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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

S-nitrosoglutathione spraying improves stomatal conductance, Rubisco activity and antioxidant defense in both leaves and roots of sugarcane plants under water deficit

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Author(s):
Silveira, Neidiquele M. ; Marcos, Fernanda C. C. ; Frungillo, Lucas ; Moura, Barbara B. ; Seabra, Amedea B. ; Salgado, Ione ; Machado, Eduardo C. ; Hancock, John T. ; Ribeiro, Rafael V.
Total Authors: 9
Document type: Journal article
Source: PHYSIOLOGIA PLANTARUM; v. 160, n. 4, p. 383-395, AUG 2017.
Web of Science Citations: 14
Abstract

Water deficit is a major environmental constraint on crop productivity and performance and nitric oxide (NO) is an important signaling molecule associated with many biochemical and physiological processes in plants under stressful conditions. This study aims to test the hypothesis that leaf spraying of S-nitrosoglutathione (GSNO), an NO donor, improves the antioxidant defense in both roots and leaves of sugarcane plants under water deficit, with positive consequences for photosynthesis. In addition, the roles of key photosynthetic enzymes ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC) in maintaining CO2 assimilation of GSNO-sprayed plants under water deficit were evaluated. Sugarcane plants were sprayed with water or GSNO 100 M and subjected to water deficit, by adding polyethylene glycol (PEG-8000) to the nutrient solution. Sugarcane plants supplied with GSNO presented increases in the activity of antioxidant enzymes such as superoxide dismutase in leaves and catalase in roots, indicating higher antioxidant capacity under water deficit. Such adjustments induced by GSNO were sufficient to prevent oxidative damage in both organs and were associated with better leaf water status. As a consequence, GSNO spraying alleviated the negative impact of water deficit on stomatal conductance and photosynthetic rates, with plants also showing increases in Rubisco activity under water deficit. (AU)

FAPESP's process: 12/19167-0 - INVOLVEMENT OF NITRIC OXIDE ON PHYSIOLOGICAL RESPONSES IN PLANTS OF SUGARCANE UNDER WATER DEFICIT
Grantee:Neidiquele Maria Silveira
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/13524-0 - Ozone effects in sugarcane
Grantee:Barbara Baesso Moura
Support Opportunities: Scholarships in Brazil - Post-Doctoral