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2013 | 35 | 01 |

Tytuł artykułu

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

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
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 scavengeO2-andH2O2 in response to salt stresswasweaker 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.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

35

Numer

01

Opis fizyczny

p.31-40,fig.,ref.

Twórcy

autor
  • Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
  • Institute for Plant Biotechnology, Stellenbosch University, Private Bag X1, Matieland, South Africa
autor
  • Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
autor
  • Institute for Plant Biotechnology, Stellenbosch University, Private Bag X1, Matieland, South Africa
autor
  • Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
autor
  • Institute for Plant Biotechnology, Stellenbosch University, Private Bag X1, Matieland, South Africa
autor
  • Agricultural Institute, Hungarian Academy of Sciences, Center for Agricultural Research, P.O. Box 19, Martonva´sa´r 2462, Hungary
autor
  • Agricultural Institute, Hungarian Academy of Sciences, Center for Agricultural Research, P.O. Box 19, Martonva´sa´r 2462, Hungary
autor
  • Department of Biotechnology, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa

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Typ dokumentu

Bibliografia

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