Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/74806
Type: Artigo de periódico
Title: Superoxide dismutase and ascorbate peroxidase improve the recovery of photosynthesis in sugarcane plants subjected to water deficit and low substrate temperature
Author: Sales, CRG
Ribeiro, RV
Silveira, JAG
Machado, EC
Martins, MO
Lagoa, AMMA
Abstract: The physiological responses of C-4 species to simultaneous water deficit and low substrate temperature are poorly understood, as well as the recovery capacity. This study investigated whether the effect of these abiotic stressors is cultivar-dependent. The differential responses of drought-resistant (IACSP94-2094) and drought-sensitive (IACSP97-7065) sugarcane cultivars were characterized to assess the relationship between photosynthesis and antioxidant protection by APX and SOD isoforms under stress conditions. Our results show that drought alone or combined with low root temperature led to excessive energetic pressure at the PSI! level. Heat dissipation was increased in both genotypes, but the high antioxidant capacity due to higher SOD and APX activities was genotype-dependent and it operated better in the drought-resistant genotype. High SOD and APX activities were associated with a rapid recovery of photosynthesis in IACSP94-2094 plants after drought and low substrate temperature alone or simultaneously. (C) 2013 Elsevier Masson SAS. All rights reserved.
Subject: Cold
Oxidative stress
Photochemical activity
Photosynthesis
Saccharum spp.
Water deficit
Country: França
Editor: Elsevier France-editions Scientifiques Medicales Elsevier
Rights: fechado
Identifier DOI: 10.1016/j.plaphy.2013.10.012
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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