REAL

Capacity to control oxidative stress-induced caspase-like activity determines the level of tolerance to salt stress in two contrasting maize genotypes

Keyster, Marshall and Klein, Ashwil and Du Plessis, Morné and Kocsy, Gábor and Galiba, Gábor (2013) Capacity to control oxidative stress-induced caspase-like activity determines the level of tolerance to salt stress in two contrasting maize genotypes. ACTA PHYSIOLOGIAE PLANTARUM, 35 (1). pp. 31-40. ISSN 0137-5881

[img] Text
art%3A10.1007%2Fs11738-012-1045-4.pdf
Restricted to Repository staff only

Download (293kB) | Request a copy

Abstract

The response of two maize (Zea mays L.) genotypes, named GR (salt-tolerant) and SK (salt-sensitive), to salt stress (150 mM NaCl) was investigated under controlled environmental growth conditions. Genotype SK experienced more oxidative damage than the GR genotype when subjected to salt stress, which corresponded to higher O2 - production rate and H2O2 content in the SK genotype than the GR genotype. Induction of caspase-like activity in response to salt stress was stronger in the SK genotype than in the GR genotype. On the other hand, induction of antioxidant enzyme activity to scavenge O2 - and H2O2 in response to salt stress was weaker in the SK genotype than in the GR genotype. Consequently, the higher level of oxidative damage in the SK genotype in response to salt stress was manifested as more extensive cell death and biomass reduction in the SK genotype than it was in the GR genotype. Our results suggest that a direct relationship exists between salt stress-induced oxidative damage and cell death-inducing caspase-like activity, with tolerance to the salt stress being controlled by the efficiency of the plant antioxidant enzymes in limiting salt stress-induced oxidative damage and thus limiting cell death-inducing caspase-like activity. © 2012 Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków.

Item Type: Article
Uncontrolled Keywords: ZEA MAYS; SALT STRESS; OXIDATIVE STRESS; Lipid Peroxidation; Cell Death; Caspase-like activity; antioxidant enzymes
Subjects: Q Science / természettudomány > QK Botany / növénytan > QK10 Plant physiology / növényélettan
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 06 Jan 2014 11:21
Last Modified: 10 Jan 2014 09:51
URI: http://real.mtak.hu/id/eprint/8368

Actions (login required)

Edit Item Edit Item