Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 49
Filter
Add more filters

Country/Region as subject
Publication year range
1.
Ecol Food Nutr ; 61(5): 576-594, 2022.
Article in English | MEDLINE | ID: mdl-35579381

ABSTRACT

The quality of food that children eat in early childhood has profound impacts on their future wellbeing. In England, many children eat the majority of meals in early years' settings including nurseries and childminders. We conducted 16 interviews with 18 stakeholders exploring food provision, the use of voluntary nutrition guidelines, and the effects of government support on the early years' sector. Key themes emerging from our thematic analysis included feeling insufficiently consulted, undervalued, support being unequally distributed, needing to fill multiple support roles for families, disagreement about the role and effect of voluntary nutrition standards, and being chronically underfunded.


Subject(s)
Food Services , Nutrition Policy , Child , Child, Preschool , England , Humans , Meals , Nutritional Status
2.
BMC Public Health ; 21(1): 1631, 2021 09 06.
Article in English | MEDLINE | ID: mdl-34488695

ABSTRACT

BACKGROUND: Hot weather leads to increased illness and deaths. The Heatwave Plan for England (HWP) aims to protect the population by raising awareness of the dangers of hot weather, especially for those most vulnerable. Individuals at increased risk to the effects of heat include older adults, particularly 75+, and those with specific chronic conditions, such as diabetes, respiratory and heart conditions. The HWP recommends specific protective actions which relate to five heat-health alert levels (levels 0-4). This study examines the attitudes to hot weather of adults in England, and the protective measures taken during a heatwave. METHODS: As part of a wider evaluation of the implementation and effects of the HWP, a survey (n = 3153) and focus groups, a form of group interview facilitated by a researcher, were carried out after the June 2017 level 3 heat-health alert. Survey respondents were categorised into three groups based on their age and health status: 'vulnerable' (aged 75+), 'potentially vulnerable' (aged 18-74 in poor health) and 'not vulnerable' (rest of the adult population) to hot weather. Multivariable logistic regression models identified factors associated with these groups taking protective measures. In-person group discussion, focused on heat-health, were carried out with 25 people, mostly aged 75 + . RESULTS: Most vulnerable and potentially vulnerable adults do not consider themselves at risk of hot weather and are unaware of the effectiveness of important protective behaviours. Only one-quarter of (potentially) vulnerable adults reported changing their behaviour as a result of hearing hot weather-related health advice during the level 3 alert period. Focus group findings showed many vulnerable adults were more concerned about the effects of the sun's ultra-violet radiation on the skin than on the effects of hot temperatures on health. CONCLUSIONS: Current public health messages appear to be insufficient, given the low level of (potentially) vulnerable adults changing their behaviour during hot weather. In the context of increasingly warmer summers in England due to climate change, public health messaging needs to convince (potentially) vulnerable adults of all the risks of hot weather (not just effects of sunlight on the skin) and of the importance of heat protective measures.


Subject(s)
Climate Change , Hot Temperature , Aged , Attitude , England/epidemiology , Humans , Seasons , Weather
3.
Biotechnol Bioeng ; 117(10): 2996-3005, 2020 10.
Article in English | MEDLINE | ID: mdl-32579250

ABSTRACT

The use of microalgal biomass for metal pollutant bioremediation might be improved by genetic engineering to modify the selectivity or capacity of metal biosorption. A plant cadmium (Cd) and zinc (Zn) transporter (AtHMA4) was used as a transgene to increase the ability of Chlamydomonas reinhardtii to tolerate 0.2 mM Cd and 0.3 mM Zn exposure. The transgenic cells showed increased accumulation and internalization of both metals compared to wild-type. AtHMA4 was expressed either as the full-length (FL) protein or just the C-terminal (CT) tail, which is known to have metal-binding sites. Similar Cd and Zn tolerance and accumulation was observed with expression of either the FL protein or CT domain, suggesting that enhanced metal tolerance was mainly due to increased metal binding rather than metal transport. The effectiveness of the transgenic cells was further examined by immobilization in calcium alginate to generate microalgal beads that could be added to a metal contaminated solution. Immobilization maintained metal tolerance, while AtHMA4-expressing cells in alginate showed a concentration-dependent increase in metal biosorption that was significantly greater than alginate beads composed of wild-type cells. This demonstrates that expressing AtHMA4 FL or CT has great potential as a strategy for bioremediation using microalgal biomass.


Subject(s)
Adenosine Triphosphatases/genetics , Arabidopsis Proteins/genetics , Bioaccumulation , Cadmium/metabolism , Chlamydomonas reinhardtii/metabolism , Plants, Genetically Modified/metabolism , Transgenes , Zinc/metabolism , Adenosine Triphosphatases/metabolism , Arabidopsis Proteins/metabolism , Biodegradation, Environmental , Biological Transport , Chlamydomonas reinhardtii/genetics
4.
Plant J ; 92(2): 291-304, 2017 Oct.
Article in English | MEDLINE | ID: mdl-28771859

ABSTRACT

Understanding the molecular basis of zinc (Zn) uptake and transport in staple cereal crops is critical for improving both Zn content and tolerance to low-Zn soils. This study demonstrates the importance of group F bZIP transcription factors and ZIP transporters in responses to Zn deficiency in wheat (Triticum aestivum). Seven group F TabZIP genes and 14 ZIPs with homeologs were identified in hexaploid wheat. Promoter analysis revealed the presence of Zn-deficiency-response elements (ZDREs) in a number of the ZIPs. Functional complementation of the zrt1/zrt2 yeast mutant by TaZIP3, -6, -7, -9 and -13 supported an ability to transport Zn. Group F TabZIPs contain the group-defining cysteine-histidine-rich motifs, which are the predicted binding site of Zn2+ in the Zn-deficiency response. Conservation of these motifs varied between the TabZIPs suggesting that individual TabZIPs may have specific roles in the wheat Zn-homeostatic network. Increased expression in response to low Zn levels was observed for several of the wheat ZIPs and bZIPs; this varied temporally and spatially suggesting specific functions in the response mechanism. The ability of the group F TabZIPs to bind to specific ZDREs in the promoters of TaZIPs indicates a conserved mechanism in monocots and dicots in responding to Zn deficiency. In support of this, TabZIPF1-7DL and TabZIPF4-7AL afforded a strong level of rescue to the Arabidopsis hypersensitive bzip19 bzip23 double mutant under Zn deficiency. These results provide a greater understanding of Zn-homeostatic mechanisms in wheat, demonstrating an expanded repertoire of group F bZIP transcription factors, adding to the complexity of Zn homeostasis.


Subject(s)
Basic-Leucine Zipper Transcription Factors/physiology , Membrane Transport Proteins/physiology , Triticum/metabolism , Zinc/deficiency , Arabidopsis/genetics , Arabidopsis/metabolism , Arabidopsis/physiology , Basic-Leucine Zipper Transcription Factors/genetics , Basic-Leucine Zipper Transcription Factors/metabolism , Gene Expression Regulation, Plant/physiology , Genes, Plant/physiology , Membrane Transport Proteins/metabolism , Phylogeny , Plants, Genetically Modified , Promoter Regions, Genetic/physiology , Triticum/genetics , Triticum/physiology , Zinc/metabolism
5.
Physiol Plant ; 2018 04 17.
Article in English | MEDLINE | ID: mdl-29667213

ABSTRACT

Antioxidant enzymatic responses in Citrus leaves under Cu-induced stress depends on rootstock genotypes. However, there is a lack of information about how woody plants recover growth capacity after exposure to elevated Cu and whether growth is affected by the redistribution of the metal to new vegetative parts and consequently whether photosynthesis is affected. Therefore, the biomass of plants and Cu concentrations in new leaf flushes were determined in young citrus trees grafted onto contrasting rootstocks [Swingle citrumelo (SW) and Rangpur lime (RL)]. Photosynthetic rate, chlorophyll fluorescence and antioxidant enzymatic systems were evaluated in plants previously grown in nutrient solution with Cu varying from low to high levels and with no added Cu. Both rootstocks exhibited reduced plant growth under Cu toxicity. However, trees grafted onto RL exhibited better growth recovery after Cu excess, which was dependent on the modulation of antioxidant enzyme activities in roots and leaves that maintained the integrity of the photosynthetic apparatus. In contrast, plants grafted onto SW exhibited a lower photosynthetic rate at the lowest available Cu concentration. Although the highest accumulation of Cu occurred in citrus roots, the redistribution of the nutrient to new vegetative parts was proportional to the Cu concentration in the roots.

6.
BMC Plant Biol ; 17(1): 174, 2017 Oct 27.
Article in English | MEDLINE | ID: mdl-29078753

ABSTRACT

BACKGROUND: P2- type calcium ATPases (ACAs-auto inhibited calcium ATPases and ECAs-endoplasmic reticulum calcium ATPases) belong to the P- type ATPase family of active membrane transporters and are significantly involved in maintaining accurate levels of Ca2+, Mn2+ and Zn2+ in the cytosol as well as playing a very important role in stress signaling, stomatal opening and closing and pollen tube growth. Here we report the identification and possible role of some of these ATPases from wheat. RESULTS: In this study, ACA and ECA sequences of six species (belonging to Poaceae) were retrieved from different databases and a phylogenetic tree was constructed. A high degree of evolutionary relatedness was observed among P2 sequences characterized in this study. Members of the respective groups from different plant species were observed to fall under the same clade. This pattern highlights the common ancestry of P2- type calcium ATPases. Furthermore, qRT-PCR was used to analyse the expression of selected ACAs and ECAs from Triticum aestivum (wheat) under calcium toxicity and calcium deficiency. The data indicated that expression of ECAs is enhanced under calcium stress, suggesting possible roles of these ATPases in calcium homeostasis in wheat. Similarly, the expression of ACAs was significantly different in plants grown under calcium stress as compared to plants grown under control conditions. This gives clues to the role of ACAs in signal transduction during calcium stress in wheat. CONCLUSION: Here we concluded that wheat genome consists of nine P2B and three P2A -type calcium ATPases. Moreover, gene loss events in wheat ancestors lead to the loss of a particular homoeolog of a gene in wheat. To elaborate the role of these wheat ATPases, qRT-PCR was performed. The results indicated that when plants are exposed to calcium stress, both P2A and P2B gene expression get enhanced. This further gives clues about the possible role of these ATPases in wheat in calcium management. These findings can be useful in future for genetic manipulations as well as in wheat genome annotation process.


Subject(s)
Calcium-Transporting ATPases/genetics , Plant Proteins/genetics , Triticum/genetics , Calcium/metabolism , Endoplasmic Reticulum/enzymology , Genome-Wide Association Study , Manganese/metabolism , Phylogeny , Plant Proteins/metabolism , Plant Proteins/physiology , Real-Time Polymerase Chain Reaction , Sequence Analysis, DNA , Stress, Physiological/physiology , Triticum/enzymology , Triticum/metabolism , Zinc/metabolism
7.
Plant Cell Environ ; 40(11): 2754-2770, 2017 Nov.
Article in English | MEDLINE | ID: mdl-28763829

ABSTRACT

Zinc (Zn) deficiency negatively impacts the development and health of plants and affects crop yield. When experiencing low Zn, plants undergo an adaptive response to maintain Zn homeostasis. We provide further evidence for the role of F-group transcription factors, AtbZIP19 and AtbZIP23, in responding to Zn deficiency in Arabidopsis and demonstrate the sensitivity and specificity of this response. Despite their economic importance, the role of F-group bZIPs in cereal crops is largely unknown. Here, we provide new insights by functionally characterizing these in barley (Hordeum vulgare), demonstrating an expanded number of F-group bZIPs (seven) compared to Arabidopsis. The F-group barley bZIPs, HvbZIP56 and HvbZIP62, partially rescue the Zn-dependent growth phenotype and ZIP-transporter gene regulation of an Arabidopsis bzip19-4 bzip23-2 mutant. This supports a conserved mechanism of action in adapting to Zn deficiency. HvbZIP56 localizes to the cytoplasm and nucleus when expressed in Arabidopsis and tobacco. Promoter analysis demonstrates that the barley ZIP transporters that are upregulated under Zn deficiency contain cis Zn-deficiency response elements (ZDREs). ZDREs are also found in particular barley bZIP promoters. This study represents a significant step forward in understanding the mechanisms controlling Zn responses in cereal crops, and will aid in developing strategies for crop improvement.


Subject(s)
Hordeum/metabolism , Plant Proteins/metabolism , Zinc/deficiency , Arabidopsis/genetics , Arabidopsis Proteins/metabolism , Cloning, Molecular , Gene Expression Regulation, Plant , Green Fluorescent Proteins/metabolism , Hydroponics , Micronutrients/metabolism , Mutation/genetics , Nucleotide Motifs/genetics , Phenotype , Phylogeny , Plant Proteins/genetics , Plants, Genetically Modified , Promoter Regions, Genetic , Protein Transport , Subcellular Fractions/metabolism
8.
Br J Nurs ; 31(17): 876-877, 2022 09 22.
Article in English | MEDLINE | ID: mdl-36149429
9.
Plant Cell ; 24(9): 3649-68, 2012 Sep.
Article in English | MEDLINE | ID: mdl-23001037

ABSTRACT

G protein-coupled receptor-type G proteins (GTGs) are highly conserved membrane proteins in plants, animals, and fungi that have eight to nine predicted transmembrane domains. They have been classified as G protein-coupled receptor-type G proteins that function as abscisic acid (ABA) receptors in Arabidopsis thaliana. We cloned Arabidopsis GTG1 and GTG2 and isolated new T-DNA insertion alleles of GTG1 and GTG2 in both Wassilewskija and Columbia backgrounds. These gtg1 gtg2 double mutants show defects in fertility, hypocotyl and root growth, and responses to light and sugars. Histological studies of shoot tissue reveal cellular distortions that are particularly evident in the epidermal layer. Stable expression of GTG1(pro):GTG1-GFP (for green fluorescent protein) in Arabidopsis and transient expression in tobacco (Nicotiana tabacum) indicate that GTG1 is localized primarily to Golgi bodies and to the endoplasmic reticulum. Microarray analysis comparing gene expression profiles in the wild type and double mutant revealed differences in expression of genes important for cell wall function, hormone response, and amino acid metabolism. The double mutants isolated here respond normally to ABA in seed germination assays, root growth inhibition, and gene expression analysis. These results are inconsistent with their proposed role as ABA receptors but demonstrate that GTGs are fundamentally important for plant growth and development.


Subject(s)
Abscisic Acid/pharmacology , Arabidopsis Proteins/genetics , Arabidopsis/genetics , Gene Expression Regulation, Plant , Plant Growth Regulators/pharmacology , Receptors, G-Protein-Coupled/genetics , Alleles , Amino Acid Sequence , Arabidopsis/drug effects , Arabidopsis/growth & development , Arabidopsis/radiation effects , Arabidopsis Proteins/metabolism , Endoplasmic Reticulum/metabolism , Fertility , Gene Expression Profiling , Germination , Golgi Apparatus/metabolism , Light , Molecular Sequence Data , Mutagenesis, Insertional , Oligonucleotide Array Sequence Analysis , Phenotype , Phylogeny , Plant Roots/drug effects , Plant Roots/genetics , Plant Roots/growth & development , Plant Roots/radiation effects , Plant Shoots/drug effects , Plant Shoots/genetics , Plant Shoots/growth & development , Plant Shoots/radiation effects , Pollen/drug effects , Pollen/genetics , Pollen/growth & development , Pollen/radiation effects , Receptors, G-Protein-Coupled/metabolism , Seedlings/drug effects , Seedlings/genetics , Seedlings/growth & development , Seedlings/radiation effects , Seeds/drug effects , Seeds/genetics , Seeds/growth & development , Seeds/radiation effects , Sequence Alignment , Nicotiana/genetics , Nicotiana/growth & development
10.
J Exp Bot ; 65(4): 1125-39, 2014 Mar.
Article in English | MEDLINE | ID: mdl-24420575

ABSTRACT

Ectopic expression in tobacco (Nicotiana tabacum v. Xanthi) of the export protein AtHMA4 (responsible in Arabidopsis for the control of Zn/Cd root to shoot translocation) resulted in decreased Cd uptake/accumulation in roots and shoots. This study contributes to understanding the mechanisms underlying this Cd-dependent phenotype to help predict the consequences of transgene expression for potential phytoremediation/biofortification-based strategies. Microarray analysis was performed to identify metal homeostasis genes that were differentially expressed in roots of Cd-exposed AtHMA4-expressing tobacco relative to the wild type. It was established that down-regulation of genes known to mediate Cd uptake was not responsible for reduced Cd uptake/accumulation in AtHMA4 transformants. The transcript levels of NtIRT1 and NtZIP1 were higher in transgenic plants, indicating an induction of the Fe and Zn deficiency status due to AtHMA4 expression. Interestingly, upon exposure to Cd, genes involved in cell wall lignification (NtHCT, NtOMET, and NtPrx11a) were up-regulated in transformants. Microscopic analysis of roots demonstrated that expression of AtHMA4 caused an induction of cell wall lignification in the external cell layers that was accompanied by enhanced H2O2 accumulation. Further study showed that the concentration of other elements (B, Co, Cu, Ni, Mo, and Zn) was reduced in AtHMA4 transformants in the presence of Cd. In conclusion, due to ectopic expression of 35S::AtHMA4, the physical apoplastic barrier within the external cell layer developed, which is likely to be responsible for the reduction of Cd uptake/accumulation.


Subject(s)
Adenosine Triphosphatases/metabolism , Arabidopsis Proteins/metabolism , Arabidopsis/genetics , Cadmium/metabolism , Gene Expression Regulation, Plant , Nicotiana/metabolism , Adenosine Triphosphatases/genetics , Arabidopsis Proteins/genetics , Biological Transport , Cell Wall/metabolism , Down-Regulation , Gene Expression , Hydrogen Peroxide/metabolism , Iron/metabolism , Lignin/metabolism , Phenotype , Plant Proteins/genetics , Plant Proteins/metabolism , Plant Roots/genetics , Plant Roots/metabolism , Plant Shoots/genetics , Plant Shoots/metabolism , Plants, Genetically Modified , Nicotiana/genetics , Transgenes , Zinc/metabolism
11.
Clin Med (Lond) ; 14(2): 113-6, 2014 Apr.
Article in English | MEDLINE | ID: mdl-24715119

ABSTRACT

Physician associates (PAs) are a new profession to the UK. There has been no prior national assessment of the perspectives of doctors who work with PAs with regard to their role. Doctors who supervise PAs were surveyed in late 2012; respondents were found generally to be satisfied with the role of PAs and believed that the addition of the PA to the team benefited doctors and patients. Doctors reported that they have received positive feedback from patients about the role of PAs as well. Respondents believe that the current unregulated status of the profession impairs their ability to use their PA staff to their fullest potential.


Subject(s)
Attitude of Health Personnel , Physician Assistants , Physicians/psychology , Professional Role , Humans , Personal Satisfaction , Physician Assistants/legislation & jurisprudence , Surveys and Questionnaires , United Kingdom
12.
Plant Cell Environ ; 36(6): 1093-104, 2013 Jun.
Article in English | MEDLINE | ID: mdl-23170996

ABSTRACT

AtHMA4 was previously shown to contribute to the control of Zn root-to-shoot translocation and tolerance to high Zn. However, heterologous expression of 35S::AtHMA4 in tobacco (Nicotiana tabacum cv. Xanthi) results in enhanced Zn sensitivity. This study provides a better understanding of the development of this Zn-sensitive phenotype and demonstrates that substantial modifications of Zn homeostasis occur due to AtHMA4 expression. We show that ectopically expressing AtHMA4 in tobacco results in overloading the root and leaf apoplast with Zn. The tissue and cellular distribution of Zn, monitored using Zinpyr-1, was altered in the AtHMA4-expressing plants compared with wild type. Increased loading of the leaf apoplast with Zn in AtHMA4 transformants induced necrosis; this appeared at lower levels of Zn supply in the transgenics compared with wild type. This study suggests that Zn concentration may be sensed in the apoplast of leaves, and if concentrations are above a certain threshold then particular groups of cells accumulate Zn and necrosis is initiated. Therefore, this could be considered as a mechanism for protecting the other parts of the photosynthetically active leaf from Zn toxicity.


Subject(s)
Adenosine Triphosphatases/metabolism , Arabidopsis Proteins/metabolism , Nicotiana/metabolism , Zinc/metabolism , Fluoresceins/metabolism , Plant Leaves/metabolism , Plant Roots/metabolism , Plants, Genetically Modified/metabolism , Protoplasts/metabolism
13.
J Exp Bot ; 64(10): 2871-83, 2013 Jul.
Article in English | MEDLINE | ID: mdl-23761487

ABSTRACT

Heavy metal homeostasis is maintained in plant cells by specialized transporters which compartmentalize or efflux metal ions, maintaining cytosolic concentrations within a narrow range. OsMTP1 is a member of the cation diffusion facilitator (CDF)/metal tolerance protein (MTP) family of metal cation transporters in Oryza sativa, which is closely related to Arabidopsis thaliana MTP1. Functional complementation of the Arabidopsis T-DNA insertion mutant mtp1-1 demonstrates that OsMTP1 transports Zn in planta and localizes at the tonoplast. When heterologously expressed in the yeast mutant zrc1 cot1, OsMTP1 complemented its Zn hypersensitivity and was also localized to the vacuole. OsMTP1 alleviated, to some extent, the Co sensitivity of this mutant, rescued the Fe hypersensitivity of the ccc1 mutant at low Fe concentrations, and restored growth of the Cd-hypersensitive mutant ycf1 at low Cd concentrations. These results suggest that OsMTP1 transports Zn but also Co, Fe, and Cd, possibly with lower affinity. Site-directed mutagenesis studies revealed two substitutions in OsMTP1 that alter the transport function of this protein. OsMTP1 harbouring a substitution of Leu82 to a phenylalanine can still transport low levels of Zn, with an enhanced affinity for Fe and Co, and a gain of function for Mn. A substitution of His90 with an aspartic acid completely abolishes Zn transport but improves Fe transport in OsMTP1. These amino acid residues are important in determining substrate specificity and may be a starting point for refining transporter activity in possible biotechnological applications, such as biofortification and phytoremediation.


Subject(s)
Cation Transport Proteins/metabolism , Oryza/metabolism , Plant Proteins/metabolism , Vacuoles/metabolism , Zinc/metabolism , Amino Acid Sequence , Cation Transport Proteins/chemistry , Cation Transport Proteins/genetics , Metals, Heavy/metabolism , Molecular Sequence Data , Mutagenesis, Site-Directed , Oryza/chemistry , Oryza/classification , Oryza/genetics , Phylogeny , Plant Proteins/chemistry , Plant Proteins/genetics , Protein Transport , Sequence Alignment , Vacuoles/chemistry , Vacuoles/genetics
14.
Plant Direct ; 7(5): e495, 2023 May.
Article in English | MEDLINE | ID: mdl-37228331

ABSTRACT

Manganese (Mn) is an essential micronutrient for plant growth but becomes toxic when present in excess. A number of Arabidopsis proteins are involved in Mn transport including ECA3, MTPs, and NRAMPs; however, their relative contributions to Mn homeostasis remain to be demonstrated. A major focus here was to clarify the importance of ECA3 in responding to Mn deficiency and toxicity using a range of mutants. We show that ECA3 localizes to the trans-Golgi and plays a major role in response to Mn deficiency with severe effects seen in eca3 nramp1 nramp2 under low Mn supply. ECA3 plays a minor role in Mn-toxicity tolerance, but only when the cis-Golgi-localized MTP11 is non-functional. We also use mutants and overexpressors to determine the relative contributions of MTP members to Mn homeostasis. The trans-Golgi-localized MTP10 plays a role in Mn-toxicity tolerance, but this is only revealed in mutants when MTP8 and MTP11 are non-functional and when overexpressed in mtp11 mutants. MTP8 and MTP10 confer greater Mn-toxicity resistance to the pmr1 yeast mutant than MTP11, and an important role for the first aspartate in the fifth transmembrane domain DxxxD motif is demonstrated. Overall, new insight into the relative influence of key transporters in Mn homeostasis is provided.

15.
Sci Rep ; 13(1): 7551, 2023 05 09.
Article in English | MEDLINE | ID: mdl-37160901

ABSTRACT

Plants require copper for normal growth and development and have evolved an efficient system for copper management based on transport proteins such as P1B-ATPases, also known as heavy metal ATPases (HMAs). Here, we report HMAs in eleven different Poaceae species, including wheat. Furthermore, the possible role of wheat HMAs in copper stress was investigated. BlastP searches identified 27 HMAs in wheat, and phylogenetic analysis based on the Maximum Likelihood method demonstrated a separation into four distinct clades. Conserved motif analysis, domain identification, gene structure, and transmembrane helices number were also identified for wheat HMAs using computational tools. Wheat seedlings grown hydroponically were subjected to elevated copper and demonstrated toxicity symptoms with effects on fresh weight and changes in expression of selected HMAs TaHMA7, TaHMA8, and TaHMA9 were upregulated in response to elevated copper, suggesting a role in wheat copper homeostasis. Further investigations on these heavy metal pumps can provide insight into strategies for enhancing crop heavy metal tolerance in the face of heavy metal pollution.


Subject(s)
Copper , Metals, Heavy , Copper/toxicity , Triticum/genetics , Poaceae , Phylogeny , Metals, Heavy/toxicity , Adenosine Triphosphatases
16.
SSM Qual Res Health ; 2: 100142, 2022 Dec.
Article in English | MEDLINE | ID: mdl-36606099

ABSTRACT

As childhood obesity and poor nutrition rates in England continue to rise, parents and childcare practitioners have key partnership roles in ensuring young children have healthy balanced diets. Yet little is known about parents' understanding and involvement in their childcare settings' food decisions and practices, and how this might be strengthened. Semi-structured interviews were carried out with a purposive sample of 59 parents with one or more children attending early years settings in England. Framework analysis was used to explore the interviews. Epstein's model of parental partnerships was adapted as a reflective lens for the findings, and their implication for early years' policy and practice. Parents reported a lack of two-way communication on food, and of opportunities for active, meaningful engagement around food and healthy eating outside of one-to-one discussions of their child's specific needs and requirements. Some parents reported a lack of trust in the food related information provided by their childcare setting. As young children spend more time in formal childcare, it is increasingly important that trusting collaborative relationships are built between parents and childcare practitioners to ensure that children have the best start in life. This study adds to the limited literature on parental involvement in early years settings. Findings suggest that more policy work and development is needed in the early years sector, particularly in ensuring clear and accessible guidelines on food in early years settings are readily available, and that practitioners and parents have more clarity about their mutual roles and responsibilities in this.

17.
Front Public Health ; 10: 1067635, 2022.
Article in English | MEDLINE | ID: mdl-36530724

ABSTRACT

Background: Preceded by a national media campaign, in May 2020, England switched to a soft opt-out system of organ donation which rests on the assumption that individuals meeting specific criteria have consented to organ donation unless they have expressed otherwise. We aimed to learn more about how the changes were communicated, how people responded and any discrepancies between key messages and how they were interpreted by the public. Methods: Summative content analysis of 286 stories and related reader-generated comments in leading UK online news sources (April 2019 to May 2021). Further detailed thematic analysis of 21 articles with reader-generated content, complemented by thematic content analysis coding of all 286 stories. Results: Most media coverage on both organ donation and the law change was positive, with little variation over time or between publications. The importance of organ donation, benefits of the law change, and emotive stories (often involving children) of those who had donated an organ described as "superheroes" or those who had received organs as benefiting from a "miracle" were frequently cited. In contrast, reader-generated comments were markedly more negative, for example, focusing on loss of individual freedom and lack of trust in the organ donation system. Commentators wished to be able to choose who their organs were donated to, were dismissive and blaming towards minority ethnic groups, including undermining legitimate worries about the compatibility of organ donation with religious beliefs and end of life cultural norms, understanding and acceptance of brain-stem death and systemic racism. Misinformation including use of inflammatory language was common. Conclusion: The portrayal of donors and recipients as extraordinary is unlikely to help to normalise organ donation. Undermining legitimate concerns, in particular those from ethnic minorities, can alienate and encourage harmful misinformation in underrepresented groups. The discrepancies between the tone of the articles and the readers comments suggests a lack of trust across the public, health, policy and media outlets. Easily accessible, ongoing and tailored sources are needed to mitigate misinformation and disinformation and ensure key messages are better understood and accepted in order to realise the ambitions of soft opt-out organ donation policies.


Subject(s)
Tissue and Organ Procurement , Child , Humans , Tissue Donors , Trust , Communication , Informed Consent
18.
J Biol Chem ; 285(41): 31243-52, 2010 Oct 08.
Article in English | MEDLINE | ID: mdl-20650903

ABSTRACT

Heavy metal pumps (P1B-ATPases) are important for cellular heavy metal homeostasis. AtHMA4, an Arabidopsis thaliana heavy metal pump of importance for plant Zn(2+) nutrition, has an extended C-terminal domain containing 13 cysteine pairs and a terminal stretch of 11 histidines. Using a novel size-exclusion chromatography, inductively coupled plasma mass spectrometry approach we report that the C-terminal domain of AtHMA4 is a high affinity Zn(2+) and Cd(2+) chelator with capacity to bind 10 Zn(2+) ions per C terminus. When AtHMA4 is expressed in a Zn(2+)-sensitive zrc1 cot1 yeast strain, sequential removal of the histidine stretch and the cysteine pairs confers a gradual increase in Zn(2+) and Cd(2+) tolerance and lowered Zn(2+) and Cd(2+) content of transformed yeast cells. We conclude that the C-terminal domain of AtHMA4 serves a dual role as Zn(2+) and Cd(2+) chelator (sensor) and as a regulator of the efficiency of Zn(2+) and Cd(2+) export. The identification of a post-translational handle on Zn(2+) and Cd(2+) transport efficiency opens new perspectives for regulation of Zn(2+) nutrition and tolerance in eukaryotes.


Subject(s)
Adenosine Triphosphatases/metabolism , Arabidopsis Proteins/metabolism , Arabidopsis/metabolism , Cadmium/metabolism , Cation Transport Proteins/metabolism , Zinc/metabolism , Adenosine Triphosphatases/genetics , Arabidopsis/genetics , Arabidopsis Proteins/genetics , Cation Transport Proteins/genetics , Ion Transport/physiology , Protein Structure, Tertiary , Saccharomyces cerevisiae/genetics , Saccharomyces cerevisiae/metabolism
19.
Plant Biotechnol J ; 9(1): 64-74, 2011 Jan.
Article in English | MEDLINE | ID: mdl-20492550

ABSTRACT

Genetic modification of Zn/Cd accumulation in roots and shoots for biofortification or phytoremediation is a focus of this manuscript. We expressed AtHMA4 (a P(1B) ATPase involved in Zn and Cd transport), AtHMA4-trunc (lacking the C-terminal region) and AtHMA4-C terminus (the C-terminal region alone) in tobacco under the CaMV 35S constitutive promoter and examined accumulation and tolerance to both metals. Expression of AtHMA4 enhanced Zn translocation to the shoots only at 10 µM Zn but not at 0.5, 100 and 200 µM Zn. AtHMA4-trunc did not show this effect and instead reduced Zn translocation to the shoot. AtHMA4-expressing plants showed a decrease in cadmium uptake when exposed to 0.25 and 5 µM Cd; this was also observed with AtHMA4-trunc-expressing lines, although to a lesser extent. Expression of AtHMA4-C-terminus containing potential metal binding sites increased cadmium and zinc concentrations in roots and shoots up to fourfold. We have demonstrated that both AtHMA4 and AtHMA4 C-terminus could be candidate genes/sequences for engineering modifications of zinc and cadmium root/shoot partitioning. However, the phenotype of transformants depended on the external metal concentration, thus it might be difficult to engineer a plant displaying the desired metal-related phenotype when grown under varying conditions of metal supply.


Subject(s)
Adenosine Triphosphatases/genetics , Adenosine Triphosphatases/physiology , Arabidopsis Proteins/physiology , Cadmium/metabolism , Nicotiana/physiology , Plant Roots/physiology , Zinc/metabolism , Arabidopsis Proteins/genetics , Biological Transport , Gene Expression , Gene Expression Regulation, Plant , Plants, Genetically Modified , Nicotiana/genetics
20.
Hisp Health Care Int ; 19(2): 112-117, 2021 06.
Article in English | MEDLINE | ID: mdl-33256476

ABSTRACT

INTRODUCTION: Hispanic women are affected by HIV. "Love, Sex & Choices" (LSC) is an innovative 12-episode urban soap opera video series targeting young adult Black women streamed to smartphones. This study purpose was to determine whether LSC is an acceptable HIV prevention intervention for female Hispanic college students in South Florida. METHOD: After institutional review board approval, female Hispanic college students were recruited from two campuses to watch the LSC video series and complete an online evaluation survey. RESULTS: Study participants (n =101) evaluated LSC as definitely/probably important for women (97.0%), helpful for making relationship decisions (86.2%), changing attitudes about having sex (79.2%), asking partners to use a condom (80.2%), leaving partners who won't use condoms (74.2%), handling oneself in tough situations in a relationship (79.2%), and getting an HIV test (83.2%). Participants liked/related to LSC and thought their friends would also like the series. CONCLUSIONS: Results indicated that young Hispanic women related to the video series, were likely to get HIV tested after watching the video series, found the story lines realistic, and thought their friends would like the series. The next step is to test the effectiveness of LSC to change behaviors of young Hispanic women at risk of HIV.


Subject(s)
HIV Infections , Love , Black or African American , Female , HIV Infections/prevention & control , Hispanic or Latino , Humans , Students , Young Adult
SELECTION OF CITATIONS
SEARCH DETAIL