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1.
J Occup Rehabil ; 2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38632114

RESUMEN

OBJECTIVE: Self-perceived interpersonal problems can challenge one's access to the work market, making it harder to attain and keep a job while adding to the distress of being outside of the labor market. METHODS: In this study, we compared the self-perceived interpersonal problems among long-term unemployed individuals taking part in vocational rehabilitation programs (VRPs) (N = 220) with those of the general population. In addition, we examined whether their self-perceived interpersonal problems changed while taking part in the VRPs. RESULTS: We found that participants report significantly higher levels of self-perceived interpersonal problems as measured by the Inventory of Interpersonal Problems (IIP), especially with regard to feeling cold/distanced, socially inhibited, vindictive/self-centered, and non-assertive. The participants did not report a significant decrease in self-perceived interpersonal problems after being part of VRPs for one year. CONCLUSION: These results are relevant as they may inform interventions targeted this population aimed at increasing employability and/or individual well-being. Importantly, the findings may be viewed as a reflection of both social and individual processes. Long-term unemployed individuals' tendency to feel insufficiently engaged may reflect difficulty with keeping up with a job market in constant change.

2.
Scand J Caring Sci ; 37(2): 534-548, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36522835

RESUMEN

INTRODUCTION: QUALIDEM is a dementia-specific QoL instrument that allows a proxy-based Quality of Life rating in all stages of dementia. It was originally developed in The Netherlands and has later been translated into English and German. This study endeavoured to translate, cross-culturally adapt and test important psychometric properties of a Danish version in a cross-sectional validation study with a nested test-retest design. METHOD: All items underwent forward and backward translation by bilingual academics. Persons with dementia were recruited from 28 healthcare units in a Danish municipality. The severity of dementia was determined using a pragmatic approach allowing the site team to trichotomise the disease (mild, moderate-severe and very severe) before scoring the QUALIDEM. Psychometric properties for QUALIDEM were determined for item characteristics, construct validity, internal consistency, test-retest reliability, measurement error and floor and ceiling effects. The study was approved by The Danish Data Protection Agency. RESULTS: A total of 169 persons with dementia, aged 51-103, were included. The construct validity testing showed that the overall proportion of correctly hypothesised correlations was 83%. Testing for internal consistency, Cronbach's α ranged from 0.65 to 0.85 in mild-severe dementia with three out of nine subscales having values below 0.7. For very severe dementia, Cronbach's α ranged from 0.44 to 0.81, with three out of six subscales having insufficient values. For test-retest reliability, the intra-class correlation coefficients ranged from 0.56 to 0.86. The 'scale width' method revealed a marked ceiling effect in all subscales ranging from 30.6% to 87.7%. DISCUSSION: The QUALIDEM was successfully translated and cross-culturally adapted into Danish. Most subscales show acceptable internal consistency and test-retest reliability. However, a substantial measurement error and ceiling effect was present in most subscales. CONCLUSION: With few exceptions, the subscales of the Danish version of QUALIDEM have acceptable validity and reliability. Future research should address the limitations of the ceiling effects.


Asunto(s)
Demencia , Calidad de Vida , Humanos , Reproducibilidad de los Resultados , Estudios Transversales , Encuestas y Cuestionarios , Psicometría/métodos , Dinamarca , Comparación Transcultural
3.
New Phytol ; 230(2): 804-820, 2021 04.
Artículo en Inglés | MEDLINE | ID: mdl-33421128

RESUMEN

The mechanisms of initiation and transmission of apomixis (asexual reproduction through seeds) in natural plant populations are important for understanding the evolution of reproductive variation. Here, we used the phylogenetic diversity of the genus Boechera (Brassicaceae), together with natural diversity in pollen types produced by apomictic lines, to test whether hybridization triggers the transition to asexuality, and whether a 'triploid bridge' is required for the formation of polyploid apomicts. We performed crosses between diploid sexual recipient and diploid apomictic donor lines and tested whether the mating system (interspecific hybridization vs intraspecific outcrossing) or pollen type (haploid vs diploid) influenced the transmission of apomixis from diploid apomictic donors into sexual recipients. We used genetic markers and flow cytometric analyses of embryo and endosperm in seeds to infer the reproductive mode. Within a single generation, initiation of both diploid and polyploid apomixis in sexual Boechera can occur. Diploid apomixis is transmitted through haploid pollen (infectious asexuality) and polyploids can form through multiple pathways. The three functional elements of apomixis occasionally segregate. Variation in pollen ploidy and the segregation of apomixis elements drive reproductive diversity of hybrids and outcrosses and can be utilized for apomixis initiation in crop breeding programs.


Asunto(s)
Apomixis , Fitomejoramiento , Apomixis/genética , Haploidia , Filogenia , Polen/genética , Semillas/genética
4.
Scand J Psychol ; 62(3): 365-373, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-33719040

RESUMEN

By providing a distinctive room for reflection, long-distance walks can help people similar to professional counselling. To understand reflection processes' influence on mental health, a framework focusing on personal transformations, specifically through the concept of liminality, can be used. Through nine semi-structured interviews with middle-aged and older long-distance walkers, this study answers the following question: How do middle-aged and older adults experience long-distance walking, and how do their experiences influence their reflective process? Four themes emerged during the analysis: (1) overcoming strain and achieving a sense of capability; (2) simplicity in obligations and having the time to pursue emotionally difficult experiences; (3) solitariness and reflection on oneself; and (4) calmness and embracing thoughts. These findings illustrate how going on long-distance walks may be similar to entering a liminal, or transformational, space. The findings show how long-distance walks can be helpful, or perhaps even therapeutic, in situations where personal transformation is required.


Asunto(s)
Salud Mental , Caminata , Anciano , Humanos , Persona de Mediana Edad , Investigación Cualitativa
5.
Proc Natl Acad Sci U S A ; 112(18): E2357-65, 2015 May 05.
Artículo en Inglés | MEDLINE | ID: mdl-25902513

RESUMEN

Asexual reproduction is expected to reduce the adaptive potential to novel or changing environmental conditions, restricting or altering the ecological niche of asexual lineages. Asexual lineages of plants and animals are typically polyploid, an attribute that may influence their genetic variation, plasticity, adaptive potential, and niche breadth. The genus Boechera (Brassicaceae) represents an ideal model to test the relative ecological and biogeographic impacts of reproductive mode and ploidy because it is composed of diploid sexual and both diploid and polyploid asexual (i.e., apomictic) lineages. Here, we demonstrate a strong association between a transcriptionally conserved allele and apomictic seed formation. We then use this allele as a proxy apomixis marker in 1,649 accessions to demonstrate that apomixis is likely to be a common feature across the Boechera phylogeny. Phylogeographic analyses of these data demonstrate (i) species-specific niche differentiation in sexuals, (ii) extensive niche conservation between differing reproductive modes of the same species, (iii) ploidy-specific niche differentiation within and among species, and (iv) occasional niche drift between apomicts and their sexual ancestors. We conclude that ploidy is a substantially stronger and more common driver of niche divergence within and across Boechera species although variation in both traits may not necessarily lead to niche evolution on the species scale.


Asunto(s)
Evolución Biológica , Brassicaceae/fisiología , Linaje de la Célula , Ecosistema , Ploidias , Alelos , Marcadores Genéticos/genética , Variación Genética , Geografía , Haplotipos , América del Norte , Partenogénesis , Filogenia , Filogeografía , Semillas/metabolismo
6.
Plant Physiol ; 163(4): 1640-59, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24130193

RESUMEN

In apomictic Boechera spp., meiotic diplospory leads to the circumvention of meiosis and the suppression of recombination to produce unreduced male and female gametes (i.e. apomeiosis). Here, we have established an early flower developmental staging system and have performed microarray-based comparative gene expression analyses of the pollen mother cell stage in seven diploid sexual and seven diploid apomictic genotypes to identify candidate factors for unreduced pollen formation. We identified a transcript unique to apomictic Boechera spp. called UPGRADE2 (BspUPG2), which is highly up-regulated in their pollen mother cells. BspUPG2 is highly conserved among apomictic Boechera spp. genotypes but has no homolog in sexual Boechera spp. or in any other taxa. BspUPG2 undergoes posttranscriptional processing but lacks a prominent open reading frame. Together with the potential of stably forming microRNA-like secondary structures, we hypothesize that BspUPG2 functions as a long regulatory noncoding messenger RNA-like RNA. BspUPG2 has apparently arisen through a three-step process initiated by ancestral gene duplication of the original BspUPG1 locus, followed by sequential insertions of segmentally duplicated gene fragments, with final exonization of its sequence structure. Its genesis reflects the hybridization history that characterizes the genus Boechera.


Asunto(s)
Apomixis/genética , Brassicaceae/crecimiento & desarrollo , Brassicaceae/genética , Secuencia Conservada , Proteínas de Plantas/genética , Polen/crecimiento & desarrollo , Polen/genética , Secuencia de Aminoácidos , Brassicaceae/citología , Quimera , Cromosomas de las Plantas/metabolismo , Flores/anatomía & histología , Flores/citología , Duplicación de Gen , Regulación de la Expresión Génica de las Plantas , Reordenamiento Génico/genética , Genes de Plantas/genética , Meiosis , Datos de Secuencia Molecular , Proteínas de Plantas/química , Proteínas de Plantas/metabolismo , Polen/citología , Biosíntesis de Proteínas/genética , Pliegue de Proteína , Estructura Secundaria de Proteína , Empalme del ARN/genética , ARN Mensajero/genética , ARN Mensajero/metabolismo , Especificidad de la Especie , Transcripción Genética
7.
Artículo en Inglés | MEDLINE | ID: mdl-36767605

RESUMEN

(1) Background: Research has shown that patients with mental health diagnoses experience less anxiety and depressive symptoms and higher levels of 'well-being' when they spend time in natural environments as part of their treatment. It has been suggested that there is a relationship between the outdoor settings and the recovery of psychiatric patients. Recovery describes an individual process, which can vary from person to person. (2) Methods: This scoping review examined the relationship between the physical environment and the recovery of psychiatric patients. Systematic searches in three online databases, namely Medline, Embase, and PsycINFO, were performed using a selection of psychiatric, environmental, and recovery terms and included both quantitative and qualitative studies. In general, 'well-being' serves as an overarching indicator when it comes to research on how outdoor settings can affect mental health. Well-being was expressed in terms of mood, social relations, and autonomy. (3) Results: A total of 8138 records were screened, 85 studies were included for full-text reading, and five articles were included in the final analysis. The review showed in general that outdoor settings, more specifically gardening, contact with nature, and a safe environment can be related to the well-being of patients on psychiatric wards. (4) Conclusions: The five reviews allow us to conclude that outdoor settings can be seen as a comprehensive resource for mental health.


Asunto(s)
Salud Mental , Naturaleza , Humanos , Ambiente
8.
Int J Qual Stud Health Well-being ; 17(1): 2110669, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-35938705

RESUMEN

PURPOSE: During the COVID-19 pandemic, older adults were portrayed as an at-risk group. While this may have been true in some respects, empirical studies on mental health, including well-being were conflicting. Some studies found that older adults demonstrated a notable emotional resilience against the impacts of the pandemic. In this study, we qualitatively examine how older adults understand well-being and how they approached pandemic's potential influence on their well-being. METHODS: 17 older adults participated in the study, out of which 14 were interviewed and three provided written responses to a set of questions. RESULTS AND CONCLUSIONS: Through Interpretative Phenomenological Analysis, three themes emerged:adaptation, control, and a sense of community. We use them to discuss three central questions within well-being theory and research: How far does well-being depend on personal traits and how far does it depend on the environment? How far do people adapt to changed circumstances, and how far is such adaption conducive to maintaining genuine well-being and not just a lowering of standards of comparison? How far does subjective well-being depend on individual and momentary experiences and how far does it depend on the larger temporal and social context of an individual?


Asunto(s)
COVID-19 , Adaptación Psicológica , Anciano , Humanos , Salud Mental , Pandemias , Personalidad
9.
Artículo en Inglés | MEDLINE | ID: mdl-35329308

RESUMEN

Self-perceived interpersonal problems are of central concern for researchers and individuals; they are at the basis of psychopathology and cause for subjective distress. In this study, we examine whether a group-based rehabilitation program in nature may reduce self-perceived interpersonal problems in a heterogeneous group of men declining participation in traditional rehabilitation offers. The intervention consisted of weekly meetings in nature, taking place over the course of nine weeks. Through a matched-control study including 114 participants in the intervention group and 39 in a treatment as usual group participating in traditional rehabilitation offers, we found that there was no statistically significant development in self-perceived interpersonal problems in the nature-based rehabilitation offer. Though promising with regards to a number of mental challenges, including relational challenges, nature-based group-rehabilitation may require a more elaborate and thoroughgoing intervention, including e.g., a therapist and more time to be an effective intervention against interpersonal problems. We conclude that perhaps due to the fundamental aspect of self-perceived interpersonal problems, exposure to nature, and being in a group of men in a similar situation for the duration that this intervention lasted, may not be enough to address such underlying perceptions of self.


Asunto(s)
Relaciones Interpersonales , Psicopatología , Humanos , Masculino
10.
Front Plant Sci ; 13: 890038, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35720540

RESUMEN

Asexual reproduction through seeds in plants (i.e., apomixis) is a heritable trait, and apomixis- linked loci have been identified in multiple species. However, direct identification of genomic elements is typically hindered as apomixis-linked loci and are commonly found in recombination-suppressed and repetitive regions. Heterochromatinized elements, such as B chromosomes and other supernumerary chromosomal DNA fragments have long been known to be associated with asexuality in both plants and animals and are prime candidate regions for the evolution of multiple apomixis factors controlling the individual elements of apomixis. Here, we examined molecular evolution, gene regulation, and chromosomal location of a male apomeiosis factor (UPG2), a long noncoding RNA gene, in sexual and apomictic Boechera with and without male apomeiosis (i.e., balanced and unbalanced apomicts). We revealed the origin of the gene in the apomixis genome on an apomixis-specific, supernumerary heterochromatic Boechera chromosome (Boe1). The UPG2 is active in the tapetum at male meiosis. We found allele classes specific to apomictic and sexual Boechera accessions and a third class that shares the features of both and points to a convergent transition state. Sex alleles are found only in some of the sexual accessions and have higher nucleotide divergence and lower transcriptional activity compared to apo alleles. These data demonstrate selective pressure to maintain the function of UPG2 for unreduced pollen formation in apomicts as the occasional transmission of the allele from unbalanced apomicts into sexual organisms that lead to pseudogenization and functional decay of copies in sexual organisms.

11.
Artículo en Inglés | MEDLINE | ID: mdl-34360035

RESUMEN

Long-distance walking is an ancient activity practiced across cultures for many reasons, including the improvement of one's health. It has even been suggested that long-distance walking may be considered a form of psychotherapy. This scoping review examined the relationship between long-distance walking and mental health among adults. Publication trends and definitions were also examined, and the reason why long-distance walking may have therapeutic effects was discussed. Systematic searches in three online databases were performed using a selection of long-distance walking terms. Both quantitative and qualitative studies were included if they examined associations between long-distance walking and mental health in an adult population. Mental health was conceptualized in broad terms, including descriptions of mental states as well as more specific measurements or notions of mental health. A total of 8557 records were screened and 26 studies were included, out of which 15 were quantitative, 9 were qualitative, and 2 were mixed. The findings showed that long-distance walking was positively related to mental health. This was most consistent with regard to emotional distress compared to somewhat inconsistent findings regarding well-being. Therefore, long-distance walking may be more appropriately used to counter some personal or emotional struggle rather than to achieve hedonic pleasure.


Asunto(s)
Salud Mental , Caminata , Adulto , Formación de Concepto , Humanos , Psicoterapia , Investigación Cualitativa
12.
BMC Psychol ; 8(1): 131, 2020 Dec 10.
Artículo en Inglés | MEDLINE | ID: mdl-33303037

RESUMEN

BACKGROUND: Research on the relationship between resilience and loneliness is sparse. The construct of resilience has been conceptualized in multiple ways, including the measurement of resilience. The Resilience Scale for Adults (RSA) is a measure of protective factors. The present study examined whether resiliency moderates any negative relationship between loneliness and mental health and additionally examined the psychometric properties of the Danish translation of the RSA. METHODS: A Danish sample (N = 422) completed the UCLA Loneliness Scale, Hopkins Symptom Check List-25 (HSCL-25), the Sense of Coherence (SOC-13), and the RSA, Resilience Scale for Adults. RESULTS: The measure of loneliness correlated significantly and negatively with most facets of the RSA, except the subscales of family cohesion and structured style. The strongest correlation was the negative one between loneliness and SOC. The results indicated that people feeling lonely also experience their life as less meaningful. CONCLUSION: The study supports the existing six-factor structure of the Resilience Scale for Adults (RSA) in a Danish sample. The results indicate that all facets of resiliency were negatively related to loneliness. Also, the facets of perception of self and family coherence could explain a substantial amount of the variance associated with symptoms of depression in relation to loneliness.


Asunto(s)
Soledad/psicología , Psicometría , Resiliencia Psicológica , Adulto , Dinamarca , Depresión/psicología , Femenino , Humanos , Masculino , Salud Mental
13.
Trends Biotechnol ; 36(2): 123-127, 2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-28893405

RESUMEN

Global food security is increasingly challenging in light of population increase, the impact of climate change on crop production, and limited land available for agricultural expansion. Here we outline how genome editing provides excellent and timely methods to optimize crop plants, and argue the urgency for societal acceptance and support.


Asunto(s)
Agricultura/métodos , Productos Agrícolas/genética , Abastecimiento de Alimentos/métodos , Edición Génica/métodos , Sistemas CRISPR-Cas , Cambio Climático , Humanos , Internacionalidad
14.
Plant Reprod ; 26(2): 65-81, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23686220

RESUMEN

Pollen size is often used as a biological parameter to estimate the ploidy and viability of mature pollen grains. In general, pollen size quantification is performed one- or two-dimensionally using image-based diameter measurements. As these approaches are elaborate and time consuming, alternative approaches that enable a quick, reliable analysis of pollen size are highly relevant for plant research. In this study, we present the volume-based particle size analysis technique as an alternative method to characterize mature pollen. Based on a comparative assay using different plant species (including tomato, oilseed rape, kiwifruit, clover, among others), we found that volume-based pollen size measurements are not biased by the pollen shape or position and substantially reduce non-biological variation, allowing a more accurate determination of the actual pollen size. As such, volume-based particle size techniques have a strong discriminative power in detecting pollen size differences caused by alterations in the gametophytic ploidy level and therefore allow for a quick and reliable estimation of the somatic ploidy level. Based on observations in Arabidopsis thaliana gametophytic mutants and differentially reproducing Boechera polyantha lines, we additionally found that volume-based pollen size analysis provides quantitative and qualitative data about alterations in male sporogenesis, including aneuploid and diploid gamete formation. Volume-based pollen size analysis therefore not only provides a quick and easy methodology to determine the somatic ploidy level of flowering plants, but can also be used to determine the mode of reproduction and to quantify the level of diplogamete formation.


Asunto(s)
Gametogénesis en la Planta/genética , Magnoliopsida/citología , Ploidias , Polen/citología , Alelos , Arabidopsis/citología , Arabidopsis/genética , Brassica/citología , Brassica/genética , Tamaño de la Célula , Diploidia , Citometría de Flujo , Magnoliopsida/genética , Mutación , Polen/genética , Poliploidía , Tetraploidía
15.
Plant Reprod ; 26(4): 309-15, 2013 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-23783772

RESUMEN

The genetic mechanisms causing seed development by gametophytic apomixis in plants are predominantly unknown. As apomixis is consistently associated with hybridity and polyploidy, these confounding factors may either (a) be the underlying mechanism for the expression of apomixis, or (b) obscure the genetic factors which cause apomixis. To distinguish between these hypotheses, we analyzed the population genetic patterns of diploid and triploid apomictic lineages and their sexual progenitors in the genus Boechera (Brassicaceae). We find that while triploid apomixis is associated with hybridization, the majority of diploid apomictic lineages are likely the product of intra-specific crosses. We then show that these diploid apomicts are more likely to sire triploid apomictic lineages than conspecific sexuals. Combined with flow cytometric seed screen phenotyping for male and female components of apomixis, our analyses demonstrate that hybridization is an indirect correlate of apomixis in Boechera.


Asunto(s)
Apomixis/genética , Brassicaceae/genética , Hibridación Genética , Brassicaceae/fisiología , Diploidia , Genética de Población , Genotipo , Fenotipo , Semillas/genética , Semillas/fisiología , Triploidía
16.
BMC Res Notes ; 4: 303, 2011 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-21851639

RESUMEN

BACKGROUND: Apomixis, a natural form of asexual seed production in plants, is considered to have great biotechnological potential for agriculture. It has been hypothesised that de-regulation of the sexual developmental pathway could trigger apomictic reproduction. The genus Boechera represents an interesting model system for understanding apomixis, having both sexual and apomictic genotypes at the diploid level. Quantitative qRT-PCR is the most extensively used method for validating genome-wide gene expression analyses, but in order to obtain reliable results, suitable reference genes are necessary. In this work we have evaluated six potential reference genes isolated from a 454 (FLX) derived cDNA library of Boechera. RNA from live microdissected ovules and anthers at different developmental stages, as well as vegetative tissues of apomictic and sexual Boechera, were used to validate the candidates. RESULTS: Based on homologies with Arabidopsis, six genes were selected from a 454 cDNA library of Boechera: RPS18 (Ribosomal sub protein 18), Efalpha1 (Elongation factor 1 alpha), ACT 2 (Actin2), UBQ (polyubiquitin), PEX4 (Peroxisomal ubiquitin conjugating enzyme) and At1g09770.1 (Arabidopsis thaliana cell division cycle 5). Total RNA was extracted from 17 different tissues, qRT-PCRs were performed, and raw Ct values were analyzed for primer efficiencies and gene ratios. The geNorm and normFinder applications were used for selecting the most stable genes among all tissues and specific tissue groups (ovule, anthers and vegetative tissues) in both apomictic and sexual plants separately. Our results show that BoechRPS18, BoechEfα1, BoechACT2 and BoechUBQ were the most stable genes. Based on geNorm, the combinations of BoechRPS18 and BoechEfα1 or BoechUBQ and BoechEfα1 were the most stable in the apomictic plant, while BoechRPS18 and BoechACT2 or BoechUBQ and BoechACT2 performed best in the sexual plant. When subgroups of tissue samples were analyzed, different optimal combinations were identified in sexual ovules (BoechUBQ and BoechEfα1), in anthers from both reproductive systems (BoechACT2 and BoechEfα1), in apomictic vegetative tissues (BoechEfα1 and BoechACT2) and sexual vegetative tissues (BoechRPS18 and BoechEfα1). NormFinder ranked BoechACT2 as the most stable in the apomictic plant, while BoechRPS18 was the best in the sexual plant. The subgroups analysis identified the best gene for both apomictic and sexual ovules (BoechRPS18), for anthers from both reproductive system (BoechEfα1) and for apomictic and vegetative tissues (BoechACT2 and BoechRPS18 respectively) CONCLUSIONS: From a total of six tested genes, BoechRPS18, BoechEfα1, BoechACT2 and BoechUBQ showed the best stability values. We furthermore provide detailed information for the accurate normalization of specific tissue gene expression analyses of apomictic and sexual Boechera.

17.
Gene ; 484(1-2): 1-12, 2011 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-21641974

RESUMEN

Mob1 genes are primarily involved in the cell cycle progression and mitosis exit in yeasts and animals. The function of a Mob1-like gene (At5g45550) from Arabidopsis thaliana was investigated using RNAi and immunological staining. AtMob1-like RNAi silenced lines showed a reduced radial expansion of the inflorescence stem and a reduced elongation zone of the primary root. Morphological features of plant organs were accompanied by a reduction in cell size. The fertility of AtMob1-like RNAi silenced lines was very low as seed production was strongly reduced. About 2% of the progeny of AtMob1-like RNAi silenced plants were tetraploid. The female and male sporogenesis was affected differentially. The ovules developed irregularly and one third of the megaspores and embryo sacs degenerated prematurely. Up to 20% of the ovules produced binucleated megaspores that failed to develop further, being their degeneration likely accompanied with a delayed programmed cell death. The anthers produced about 30% of aborted pollen grains, showing also a strong variation in their size. Together, the results show that Arabidopsis MOB1-like is required to regulate cell expansion and cell division, presumably by affecting the mitotic as well as the meiotic cell cycle.


Asunto(s)
Arabidopsis/genética , Genes de Plantas , Genes cdc , Óvulo Vegetal/genética , Polen/genética , Fertilidad/genética , Silenciador del Gen , Raíces de Plantas/anatomía & histología , Raíces de Plantas/genética , Tallos de la Planta/anatomía & histología , Tallos de la Planta/genética , Esporas/genética
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