Reappraisals of biological behaviors of PDGFRA mutant gastrointestinal stromal tumor / 中华病理学杂志

Objective: To investigate the biological behavior spectrum of platelet-derived growth factor alpha receptor (PDGFRA)-mutant gastrointestinal stromal tumor (GIST), and to compare the clinical values of the Zhongshan method of benign and malignant evaluation with the modified National Institutes of Health (NIH) risk stratification. Methods: A total of 119 cases of GIST with PDGFRA mutation who underwent surgical resection at Zhongshan Hospital, Fudan University from 2009 to 2020 were collected. The clinicopathological data, follow-up records, and subsequent treatment were reviewed and analyzed statistically. Results: There were 79 males and 40 females. The patients ranged in age from 25 to 80 years, with a median age of 60 years. Among them, 115 patients were followed up for 1-154 months, and 13 patients progressed to disease. The 5-year disease-free survival (DFS) and overall survival (OS) were 90.1% and 94.1%, respectively. According to the modified NIH risk stratification, 8 cases, 32 cases, 38 cases, and 35 cases were very-low risk, low risk, intermediate risk, and high risk, and 5-year DFS were 100.0%, 95.6%, 94.3%, and 80.5%, respectively. There was no significant difference in prognosis among the non-high risk groups, only the difference between high risk and non-high risk groups was significant (P=0.029). However, the 5-year OS was 100.0%, 100.0%, 95.0% and 89.0%, and there was no difference (P=0.221). According to the benign and malignant evaluation Zhongshan method, 43 cases were non-malignant (37.4%), 56 cases were low-grade malignant (48.7%), 9 cases were moderately malignant (7.8%), and 7 cases were highly malignant (6.1%). The 5-year DFS were 100.0%, 91.7%, 77.8%, 38.1%, and the difference was significant (P<0.001). The 5-year OS were 100.0%, 97.5%, 77.8%, 66.7%, the difference was significant (P<0.001). Conclusions: GIST with PDGFRA gene mutation shows a broad range of biological behavior, ranging from benign to highly malignant. According to the Zhongshan method, non-malignant and low-grade malignant tumors are common, the prognosis after surgery is good, while the fewer medium-high malignant tumors showed poor prognosis after surgical resection. The overall biological behavior of this type of GIST is relatively inert, which is due to the low proportion of medium-high malignant GIST. The modified NIH risk stratification may not be effective in risk stratification for PDGFRA mutant GIST.

Molecular detection, risk factors, and phylogenetic analysis of tick-borne pathogens in dogs from northern Vietnam

@#In tropical regions, numerous tick-borne pathogens (TBPs) play a crucial role as causative agents of infectious diseases in humans and animals. Recently, the population of companion and pet dogs has significantly increased in Vietnam; however, information on the occurrence of TBPs is still limited. The objectives of this investigation were to determine the occurrence rate, risk factors, and phylogenetic characteristics of TBPs in dogs from northern Vietnam. Of 341 blood samples tested by PCR, the total infection of TBPs was 73.9% (252/341). Babesia vogeli (18SrRNA gene – 30.5%) was detected most frequently in studied dogs followed by Rickettsia spp. (OmpA gene – 27%), Anaplasma platys (groEL gene – 22%), Bartonella spp. (16SrRNA – 18.8%), Mycoplasma haemocanis (16SrRNA – 9.4%) and Hepatozoon canis (18SrRNA gene – 1.2%), respectively. All samples were negative for Ehrlichia canis and Anaplasma phagocytophylum. Co-infection was detected in 31.4% of the samples (107/341) of which, A. platys/Bartonella spp. (34/94,10%), Rickettsia spp./B. vogeli (19/94, 5.6%), and M. haemocanis/B. vogeli (19/94, 5.6%) were recorded as the three most frequent two species of co-infection types. Statistical analysis revealed a significant correlation between TBP infection and several host variables regarding age, breed, and living area in the current study. The recent findings reported herein, for the first time in Vietnam, are essential for local veterinarians when considering the appropriate approaches for diagnosing these diseases. Furthermore, this data can be used to establish control measures for future surveillance and prevention strategies against canine TBPs in Vietnam.

Utilization of Nikshay Poshan Yojana scheme among tuberculosis patients registered in a designated microscopy center, Bangalore

Background: Nutritional support plays an important role in the management of tuberculosis. To reduce malnutrition among those suffering from TB, the government of India started the Nikshay Poshan Yojana in 2018, offering a monthly incentive of INR 500 to each patient enrolled under the programme. Objective was to assess the utilization of financial benefits among tuberculosis patients registered under the scheme Nikshay Poshan Yojana. Methods: Descriptive study was conducted among 137 tuberculosis patients registered under Nikshay portal of designated microscopy center (DMC). Interview was conducted and obtained necessary information. Results: Among 116 responded tuberculosis patents, 83 (71.5%) received full and partly incentives throughout the course of treatment, among the beneficiary 61 (71.5%) were using their incentives for nutritional purpose. Conclusions: Beneficiaries under Nikshay Poshan Yojana received incentives but not on timely basis.

Awareness on dengue haemorrhagic fever prevention in Insein township, Yangon region, Myanmar

Background: Dengue is an epidemic-prone, vector-borne communicable disease found all over the world. Effective prevention and control of Dengue requires vector control and interrupting human-vector contact. Vector control methods can only be effective with community awareness and engagement regarding preventing dengue haemorrhagic fever (DHF). This study aimed to assess the awareness of DHF prevention in an urban township in Yangon, Myanmar. Methods: A cross-sectional study was conducted among 218 participants in an urban slum in Insein Township, Yangon, Myanmar, from July 2019 to August 2019. The knowledge level of DHF prevention was assessed using a structured questionnaire with face-to-face interviews. Results: Female respondents accounted for (n=148, 67.9%), and the average age of the respondents was 40.67 years (SD±13.25). The present study indicates that (n=176, 80.7%) had a good knowledge of DHF prevention. Most participants knew that mosquito biting is the cause of DHF, the signs and symptoms of DHF, and individual preventive activities of DHF. The participants (n=129, 59.2%) correctly identified clean water as mosquito breeding sites and a quarter of the respondents (n=56, 25.7%) provided inaccurate information about Aedes mosquitos as causal vectors of dengue fever. Some respondents (n=27, 12.3%) provided incorrect responses about the transmission of the daytime biting habit of the Aedes mosquito. Conclusions: The participants had good levels of knowledge, but insufficient knowledge and preventive practices of DHF were noted. Health promotion programs should focus more on correcting incorrect DHF knowledge and improving prevention strategies to enhance vector control and personal protection within the community.

The Effect of Sleep Quality on Psychological Distress Among Saudi Healthcare Students and Professionals

The negative impacts of the COVID-19 pandemic are evident in the literature. Yet nearly 2 years into the pandemic, little information is available about the sleep quality and psychological well-being of healthcare students and professionals in Saudi Arabia. This study aimed to assess the relationship between sleep quality and psychological distress in that population during the pandemic. A self-administered online questionnaire consisting of three sections was distributed to participants through social media platforms to evaluate sleep quality and psychological distress. The questionnaire was completed by 771 Saudi healthcare students and professionals. There was an inverse relationship between sleep quality and psychological distress (p?<?0.001, R2?=?0.138). The sleep quality score was statistically different between participants with chronic conditions and those without (5.2 (±?2.1), 5.8 (±?2.2), p?=?0.008, respectively). Severe psychological distress was reported by 35.5%, while 31.6% reported mild to moderate psychological distress. Female healthcare students were more susceptible to psychological distress than males (p?<?0.001). Healthcare students and interns/residents were more susceptible to psychological distress than medical specialists or consultants (p?=?0.001, p?=?0.033, respectively). Engaging in healthy lifestyle behaviors decreased the risk of psychological distress (p?<?0.001, p?=?0.006, respectively). The findings imply that sleep quality enhancement may decrease the risk of psychological distress among healthcare students and professionals in Saudi Arabia. Decision makers in healthcare facilities and schools could implement stress relief and coping programs to potentially reduce the risk of stress. Future in-depth qualitative research is warranted to examine the factors affecting sleep quality and psychological well-being.

Determinants of tuberculosis in Central Region of Eritrea: a matched case-control study

Background: The WHO has recommended the need for holistic approach towards TB, including addressing the underlying socio-economic determinants in conjunction with direct observed treatment short-course (DOTS). However, there is lack of epidemiological data in Eritrea regarding factors that are associated with TB and this study aimed to assess such factors. Methods: A matched case-control study was used to assess factors that are associated with TB in the Central Region of Eritrea. A structured questionnaire was used to collect data about socio-demographic characteristics, living status, housing conditions, and medical history of the study participants. All TB patients in the eight DOTS treatment centers and two age-and-sex-matched controls for each case were included. Bivariate and multivariable conditional logistic regression models were used to identify the main risk factors of TB. Results: The study recruited 67 cases and 134 controls. Bivariate analyses indicated that BCG vaccination scar, past alcohol drinking habit, history of hospital admission, previous history of TB, and family history of TB were found to be factors associated with TB. Moreover, results of multivariable analysis showed that, absence of BCG vaccination scar, family history of TB, past drinking habit, and history of hospital admission were found to be factors associated with TB among the study participants. Conclusions: This is the first study in the Central Region of Eritrea that assessed the determinant of tuberculosis. Absence of BCG vaccination scar, family history of TB, past alcohol consumption and history of hospital admission were found to be independent risk factors for TB.c

Quality of life in children with cerebral palsy

Background: Cerebral palsy (CP) is the most common motor disability in childhood. Quality of life (QOL) has emerged as an important concept in childhood, especially for children with disabilities. CP has an impact on a child’s capacity to do activities of daily living thus affecting QOL of patients and their families. Aims and Objectives: The objective of present study was to assess the QOL in children with CP. Materials and Methods: In this study, 29 children with CP in the age group of 4–12 years were evaluated for QOL was assessed using CPQOL-Child Primary Caregiver Questionnaire (4–12 years). The questionnaire was completed by one of the parents or their caregiver. Scores for each domain of QOL were converted to a scale ranging from 0 to 100 and analyzed. Results: The scores as reported by the parents were low for each of the domains with maximum effect seen in functioning domain and least in pain domain. Girls had better QOL than boys. The QOL scores were negatively related to the severity of CP which was assessed by gross motor function classification system suggesting that severity of disability had negative impact on QOL. Conclusion: QOL of children with CP was found to be poor and was influenced by age, sex and motor functioning

Research status and prospect of immunotherapy in gastrointestinal stromal tumors / 中华胃肠外科杂志

Tyrosine kinase inhibitors (TKI) significantly reduce the risk of recurrence and metastasis and prolong survival in patients with gastrointestinal stromal tumors (GIST), but drug resistance is often inevitable. Immunotherapy has been proven effective in multiple solid tumors, but the efficacy in GIST is unclear. The efficacy of immunotherapy depends on the tumor microenvironment (TME). Tumor-infiltrating immune cells and immune checkpoints are important components of TME, which not only participate in the regulation of tumor immune response but are also the key target of immunotherapy. A comprehensive analysis of them can clarify the mechanism of tumor immune escape. This review found that there are abundant tumor-infiltrating immune cells in GIST, which play an important role in tumor immune surveillance and escape. Although early clinical studies have shown that patients with GIST have a good tolerance to immunotherapy, the curative effect is not satisfactory. Therefore, how to select the responders of immunotherapy and coordinate the relationship between immunotherapy and TKIs is the key issue to be explored. At the same time, the gradual deepening of basic research and large sample prospective clinical trials will certainly provide more strategies for the application of immunotherapy in GIST.

Interventions to improve health literacy in Nigeria: systematic review of effectiveness and policy recommendations

Background: Health literacy plays a crucial role in enabling individuals to navigate and make informed decisions within the healthcare system. It encompasses the ability to understand, interpret, and act upon medical information and instructions, as well as the capacity to source and analyse relevant health information for preventive measures and self-care. This paper explores the interventions aimed at improving health literacy in Nigeria and synthesizes policy recommendations for the Nigerian government. Method: A systematic literature review based on the PRISMA methods was carried out to identify published interventions and reported effectiveness in the Nigerian population. A search strategy using key words health literacy and health interventions was executed in PubMed, Embase and African Index Medicus. A total of 268 records were screened for relevance and 18 were identified. Results: Of the 18 reports identified, 13 interventions were effective, 3 interventions had mixed results reporting effectiveness in some domains and ineffectiveness in other important domains, while 2 interventions were not effective. The nature of effectiveness in the interventions was based on the outcomes as reported in the identified studies. Conclusion: The health literacy situation in Nigeria provides a background into some of the challenges faced in achieving universal health coverage and promoting health in Nigeria. Low literacy rates, particularly in its many rural areas, the lack of functional, communicative, and critical health literacy competencies among many adults, as conceptualised in literature pose a significant obstacle to health literacy development in Nigeria. Many of the health literacy interventions have been effective to address various aspects of health literacy on a rather small scale. To comprehensively address the problem, collaborative efforts involving the government, healthcare professionals, non-governmental organisations, media, and the community are necessary.

Secondary Metabolites and Mineral Elements of Manotes expansa and Aframomum alboviolaceum Leaves Collected in the Democratic Republic of Congo

Background and Aims: Manotes expansa Sol. ex Planch. and Aframomum alboviolaceum (Ridl.) Schum. are two plants belonging respectively to the family Connaraceae R.Br. and Zingiberaceae Martino widely used in traditional medicine for the treatment of eye diseases, fever, headaches, gastritis as well as asthma. The aim of the present study is the valorization of these two plants collected in the Democratic Republic of Congo by a quantitative and qualitative analysis of secondary metabolites and mineral elements in their leaves. Materials and Methods: The determination of secondary metabolites in the leaves of Manotes expansa and Aframomum alboviolaceum was carried out by UV-Visible spectrophotometry and X-ray fluorescence spectrophotometry for the identification and quantitative analysis of mineral elements. Results: The results showed that the leaves of these two plants are rich in phenolic compounds, i.e. 442.2 mgEqAG/g for the leaves of A. alboviolaceum, 370.64 mgEqAG/g for the red leaves and 282.64 mgEqAG/g green leaves of M. expansa. Although being part of the same plant, the red and green leaves of M. expansa presented a totally different phytochemical profile. The contents of condensed tannins, anthocyanins and flavonoids are respectively 0.3%, 0.68% and 3.29% for the leaves of A. alboviolaceum; 0.58%, 0.36% and 6.89% for the red leaves, and 0.65%, 0.26% and 7.55% for the green leaves of M. expansa. The mineral content in the leaves of both plants remains dominated by the high concentration of potassium (K), calcium (Ca), Magnesium (Mg), Manganese (Mn) and Iron (Fe). Conclusion: The high content of phenolic compounds and essential trace elements makes the leaves of M. expansa and A. alboviolaceum potential candidates to alleviate several health problems in Africa in general and particularly in the Democratic Republic of Congo.

Localization and Distribution of Two Invasive Alien Species Eichhornia crassipes and Echinocloa pyramidalis in the Pool Malebo Eco-region, Democratic Republic of the Congo

Aim: To study the distribution of two invasive alien plants and associated plants as well as their distribution in the Malebo Pool eco-region. Methodology: The study was carried out by direct observation by circulating on a motorized canoe. Plant samples were randomly harvested (n=6) in August 2020 depends on the sites. Plant species identification was performed on the field, and those species of which the identification was difficult, were brought to the laboratory for proper identification according to APG III. Results: 19 species, including two Pteridophytes and 17 Angiosperms, belonging to 19 families and 12 orders were identified. The site of Molondo was the most diversified with 15 plant species, followed respectively by the sites of Mipongo (13 species), Japon (12 species) and Kingabwa (07 species). The plant species Ludwigia abyssinica A. Rich., Ipomoea aquatica Forsk, Eichhornia crassipes (Mart), Pistia stratiotes L, Echinochloa pyramidalis (Lam) and Salvinia molesta D.S. Mitchell were present in all four prospected sites. E. pyramidalis and E. crassipes constitute a serious threat for the environment and are source of erosion/loss of aquatic biodiversity. Physiologically, these species form a mono-specific carpet and eliminate native or autochthonous species of aquatic flora.Conclusions and Suggestions: The invasion of alien species is a consequence of human activities and a concern, as it affects all sectors of society. These plants can alter, disrupt, and degrade many ecosystem services like the disturbing of habitats and the alteration of the environmental and biological conditions around them. They can also reduce light and diversity of native aquatic plant species. Controlling invasive alien species is thus a challenge for the Congolese society. Political decision-makers are therefore invited to take appropriate measures for managing and protecting the local aquatic flora and valorize the invasive plants as potential medicinal remedy.

Review of the Literature on Oral Cancer: Epidemiology, Management and Evidence-based Traditional Medicine Treatment

Oral cavity cancers are part of the upper aerodigestive tract cancers and represent a significant burden worldwide. Its epidemiology varies from country to country with high frequencies in South East Asian countries. Tobacco and alcohol are the main risk factors. Survival of oral cancer is low i.e., less than 40% in the advanced stage (stage III and IV), diagnosis of oral cavity cancer is based on a complete clinical examination of the oral cavity complete with biopsy, bio-markers are an adjunct to screening and diagnosis of oral cavity cancers, surgery, radiotherapy, chemotherapy and immunotherapy are part of the therapeutic armamentarium of oral cancer but also have limitations. Traditional medicine is an important and proven alternative in the treatment and support of patients with oral cavity cancer. Prevention of oral cavity cancers includes not only early detection of precancerous and cancerous lesions but also control of risk factors and education of the population. Surgery, radiotherapy, chemotherapy and immunotherapy are part of the therapeutic strategy of oral cancer treatment but also have limitations. Traditional Medicine is an important and proven alternative in the treatment and support of patients with oral cavity cancer. It is thus desirable to scientifically validate phytochemicals in order to integrate alternative medicine as part of national cancer management strategy. In silico advanced studies on secondary metabolites of medicinal plants traditionally used to treat oral cancer are in progress.

Analysis of the Anti-inflammatory and Antioxidant Potential of the Fractions Obtained From the Ethyl Acetate Partition of the Leaves of Diplopterys Pubipetala

Aims: The objective of this work was to analyze the anti-inflammatory, cytotoxic and antioxidant activity of the fractions of ethyl acetate from the leaves of D. pubipetala. Methodology: Liquid-liquid partitioning was performed, the ethyl acetate partition was eluted in classical liquid chromatography, followed by thin layer chromatography. Antioxidant activity was performed by the DPPH photochlorimetric method and the levels of interleukin (IL?6), tumor necrosis factor ? (TNF??), interleukin-10 (IL-10) and nitric oxide (NO) were identified in supernatants of cell cultures. Results: Fractions F4, F5 and F10 showed antioxidant activity. The F10 fraction indicated efficient anti-inflammatory activity by the production of IL-10 and nitric oxides. Fractions F4, F5 and F9 stimulated the production of IL-6 and TNF-?. Conclusion: These results indicate a possible synergistic action of the extract and the partition of ethyl acetate, since after fractionation the potential presented in previous studies was lower.

Ethno-botanical Survey and Chemical Study of Medicinal Plants Traditionally used to Treat Anemia in Yakoma Territory (Nord Ubangi), Democratic Republic of the Congo

Aims of the Study: To identify plant species traditionally used to treat anemia in Yakoma territory and to evaluate their chemical composition. Place and Duration: Yakoma Territory (survey) and University of Kinshasa (Phytochemical study), from August and October 2019. Methods: Ethnobotanical survey according to the "snowball" sampling technique among traditional healers (based on the free consent of the respondents), chemical analyses of plant materials (chemical screening, TLC, phytomarkers content, minerals composition) according to standard methods. ED-XRF was used for mineral analysis. Microsoft Excel version 2010, Origin version 8.5 Pro and IBM SPSS statistics version 20 software packages were used for data processing and analysis. Results and Discussion: The survey showed that 18 plant species are traditionally used by Ngbandi traditional healers to treat anemia in Yakoma territory. They belong to 16 families and 17 genera. The most used organs are the leaves (68.4%) and the roots (10.5%). Decoction and infusion are the most used mode of preparation (33.3% each), followed by cooking (22.2%) and maceration (11.1%). The oral route (77.8%) is the most used mode of administration followed by the enema (16.7%) and the anal route (5.6%). Morphological types consist of herbs and trees (33.3% each) and shrubs and lianas (16.7% each). The biotope types consist of forest plants (44.4%), cultivated plants/Crops (38.9%), marshy ground plants (11.1%) and ruderal plants (5.6%). These plants belonging to five biological types: erected therophytes (44.4%), mesophanerophytes (27.8%), microphanerophytes and climbing phanerophytes (11.1% each) and lianescent phanerophytes (5.56%). These anti-anemic plant species are mostly Pantropical and Afro-tropical (39% of species each) followed by Guineo-Congolese (17% of species) and American (5%). Chemical analysis revealed the presence of alkaloids, anthocyanins, flavonoids, anthraquinones and terpenoids and various minerals including iron, zinc, copper, calcium, magnesium and manganese. Conclusion: In the current state of knowledge, the survey of anemic plants from this part of the Democratic Republic of the Congo is reported for the first time.

Chemical Composition of Palm Oil Mill Sludge-Biodegraded Sweet Orange Peel Meal Mixture and Its Effect as Dietary Energy Source on Nutrient Digestibility by Broiler Chickens

A feeding trial, which lasted for seventy days, was conducted in which palm oil mill sludge and biodegraded sweet orange peel mixture was fed to substitute maize in broiler chicken diet at 0%, 5%, 10%, 15%, 20% and 25%. Sweet orange (Citrus sinensis) fruit peel was fermented by soaking for 48 h in retted cassava waste water (CWW) and sundried, to obtain biodegraded sweet orange peel (BSOP). Palm oil mill effluent was filtered with a 0.30 mm pore plastic mesh sieve, poured into a 0.75 ?m pore fine cheesecloth bag and allowed to stand for five hours to produce a paste of palm oil mill sludge (POMS). The POMS was mixed with BSOP in ratio 1:1, sundried, milled to produce a POMS-BSOP mixture. One hundred and eighty day-old Cobb 700 broilers divided into six equal parts, and three replicates of 10 birds each were used. Each part was assigned to one of 6 diets compounded with 0% (T1), 5% (T2), 10% (T3), 15% (T4), 20% (T5) and 25% (T6) of POMS-BSOP mixture. The microbial composition of retted CWW, chemical composition of the POMS-BSOP mixture, and the digestibility of nutrients by the broiler chickens were determined. Isolated from CWW were; Staphylococcus aureus, Streptococcus spp., Salmonella spp., Escherichia coli (bacteria), Aspergillus spp. (fungus) and Candidia spp. (yeast). POMS-BSOP was high in energy (4415.69 kcalME/kg), ether extract (41.50%), crude fibre (25.63%) and dry matter (92.28%), moderate in crude protein (6.83%), low in indigestible lignin (4.90% ADL), alkaloid (0.01%), tannin (0.02%), saponin (0.03%), phytate (0.05%), oxalate (0.15%) and flavonoid (0.17%). Dietary treatments significantly (P<0.05) affected digestibility of ether extract and metabolisable energy and crude protein digestibility by broiler chickens. Dietary maize can be replaced at up to 25% with a POMS-BSOP mixture to improve energy digestibility by broiler chickens.

Pneumopericardium, pneumomediastinum and surgical emphysema in spontaneous pneumothorax

Spontaneous pneumothorax leading to pneumomediastinum, pneumopericardium and surgical emphysema is a benign condition. Progression to the development of epidural pneumatosis is rare. We report a 19-year-old man who presented with dyspnoea and swelling of the chest wall following a bout of cough. Bilateral subcutaneous emphysema was palpated on the anterior chest wall from the sternum to the midaxillary regions. His chest X-ray revealed subcutaneous emphysema and pneumopericardium. His computed tomography of the thorax to rule out life-threatening conditions revealed bilateral subcutaneous emphysema, pneumomediastinum, pneumo-pericardium and pneumothorax. He was transferred to the intensive care unit. An intercostal drainage tube was inserted in the left pleural cavity. The patient was followed up with repeat chest X-rays. The patient’s symptom got relieved and was discharged after day 9. Diagnosis of pneumomedia-stinum may not be as lamentable as it is seen. Close cardio-pulmonary monitoring is mandatory for complications and accompanying conditions. Most patients with uncomplicated spontaneous pneumomediastinum respond well to oxygen and conservative management. In this case, the patient’s symptoms and severe tachypnoea prompted the insertion of an intercostal drainage tube.

Osmoprotection in Salvia hispanica L seeds under water stress attenuators / Osmoproteção em sementes de Salvia hispanica L sob atenuadores do estresse hídrico

Salvia hispanica cultivation is recent in Brazil and occurs in the off-season, when there is lower water availability in the soil. Water deficit is one of the abiotic factors that most limit germination for compromising the sequence of metabolic events that culminate with seedling emergence. Several attenuating substances have been used to mitigate the effects resulting from this stress and give higher tolerance to the species. Thus, the objective of this study was to evaluate the action of different agents as water stress attenuators in the germination and accumulation of organic compounds in S. hispanica seedlings. The treatments consisted of pre-soaking the seeds for 4 hours in salicylic acid (1 mM.L-¹), gibberellic acid (0.4 mM.L-¹), distilled water and control treatment (without soaking). The seeds were germinated at osmotic potentials of 0.0, -0.1, -0.2, -0.3 and -0.4 MPa, using PEG 6000 as an osmotic agent. The variables germination percentage, germination speed index, shoot and primary root lengths, total dry mass, proline, total soluble sugars and total free amino acids were analyzed. Salicylic acid and gibberellic acid led to the best results among the attenuators tested, increasing germination, length, dry mass and biochemical components of S. hispanica seedlings under water deficit. Therefore, salicylic and gibberellic acids are efficient in mitigating water stress in S. hispanica seeds up to the potential of -0.4 MPa.

O cultivo da Salvia hispanica é recente no Brasil e se dá no período de entressafra, quando há menor disponibilidade hídrica no solo. O déficit hídrico é um dos fatores abióticos que mais limitam a germinação por comprometer a sequência de eventos metabólicos que culminam com a emergência da plântula. Diversas substâncias atenuadoras têm sido empregadas com a finalidade de mitigar os efeitos resultantes desse estresse e conferir maior tolerância às espécies. Desse modo, objetivou-se avaliar a ação de diferentes agentes como atenuadores do estresse hídrico na germinação e acúmulo de compostos orgânicos em plântulas de S. hispanica. Os tratamentos consistiram na pré-embebição das sementes durante 4 horas em ácido salicílico (1 mM.L-¹), ácido giberélico (0,4 mM.L-¹), água destilada e o tratamento controle (sem embebição). As sementes foram germinadas sob os potenciais osmóticos 0,0, -0,1, -0,2, -0,3 e -0,4 MPa, utilizando PEG 6000 como agente osmótico. Analisaram-se as variáveis porcentagem de germinação, índice de velocidade de germinação, comprimento da parte aérea e da raiz primária, massa seca total, prolina, açúcares solúveis totais e aminoácidos livres totais. O ácido salicílico e o ácido giberélico apresentaram os melhores resultados, dentre os atenuadores testados, incrementando a germinação, o comprimento, a massa seca e os componentes bioquímicos de plântulas de S. hispanica sob déficit hídrico. Logo, os ácidos salicílico e giberélico são eficientes na mitigação do estresse hídrico em sementes de S. hispanica até o potencial -0,4 MPa.