Please use this identifier to cite or link to this item: http://repositorio.ufc.br/handle/riufc/63248
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dc.contributor.authorGadelha, Cibelle Gomes-
dc.contributor.authorCoutinho, Ítalo Antônio Cotta-
dc.contributor.authorPinheiro, Sergimar Kennedy de Paiva-
dc.contributor.authorMiguel, Emilio de Castro-
dc.contributor.authorCarvalho, Humberto Henrique de-
dc.contributor.authorLopes, Lineker de Sousa-
dc.contributor.authorGomes-Filho, Enéas-
dc.date.accessioned2021-12-29T17:38:42Z-
dc.date.available2021-12-29T17:38:42Z-
dc.date.issued2021-
dc.identifier.citationGADELHA, Cibelle Gomes et al. Sodium uptake and transport regulation, and photosynthetic efficiency maintenance as the basis of differential salt tolerance in rice cultivars. Environmental and Experimental Botany, [s. l.], v. 192, 2021.pt_BR
dc.identifier.urihttp://www.repositorio.ufc.br/handle/riufc/63248-
dc.description.abstractRice (Oryza sativa L.) is among the most consumed cereals in the world. Its growth is severely affected by excessive salinity, leading to considerable negative economic impacts. Thus, BRS Esmeralda and S ̃ao Francisco rice cultivars, presenting antagonist cultivation recommendations and differential salt tolerance, were selected to examine how salt stress influences ionic homeostasis and photosynthetic capacity. Phenotypic, physiological, molecular, and morphological results indicated that S ̃ao Francisco had a better potential to withstand salt stress than BRS Esmeralda. Although salinity promoted a significant increase in Na+content, particularly in BRS Esmeralda, the harmful effects were less severe in S ̃ao Francisco. The upregulation of SOS and NHX gene ex-pressions revealed that S ̃ao Francisco used these mechanisms to control Na+accumulation in cytosol. Besides, S ̃ao Francisco plants were efficient in reducing the adverse effects of salinity on photosynthesis. Under salt stress, S ̃ao Francisco leaves exhibited better effective quantum efficiency of PSII, photochemical extinction coefficient, and electron transport rate. Besides, the relative energy excess in PSII and non-photochemical quenching were both smaller compared to BRS Esmeralda. Na+cytotoxic effects damaged the chloroplast ultrastructure in BRS Esmeralda, reducing photosynthetic capacity. In contrast, the S ̃ao Francisco cultivar’s better performance was followed by an efficient Na+exclusion and photosynthetic capacity maintenance, leading to lower growth losses. Overall, the findings are suitable for understanding salt responses and developing functional markers associated with salt stress tolerance improvement in rice.pt_BR
dc.language.isopt_BRpt_BR
dc.publisherEnvironmental and Experimental Botanypt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectSalt stresspt_BR
dc.subjectOryza sativapt_BR
dc.subjectGene expressionpt_BR
dc.subjectPhotosynthesispt_BR
dc.subjectIonic homeostasispt_BR
dc.subjectChloroplast ultrastructurept_BR
dc.titleSodium uptake and transport regulation, and photosynthetic efficiency maintenance as the basis of differential salt tolerance in rice cultivarspt_BR
dc.typeArtigo de Periódicopt_BR
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