Involvement of CDSP 32, a drought‐induced thioredoxin, in the response to oxidative stress in potato plants

FEBS Letters

Cuiné, Stéphan¹  Peltier, Gilles¹  Rey, Pascal¹  Broin, Mélanie¹ 

[1] CEA/Cadarache, DSV, DEVM, Laboratoire d'Ecophysiologie de la Photosynthèse, 13108 Saint-Paul-lez-Durance Cedex, France

关键词: Chloroplast;    Drought;    Oxidative stress;    Thioredoxin;    Solanum tuberosum;    CDSP;    chloroplastic drought-induced stress protein;    GSH and GSSG;    reduced and oxidized glutathione;    respectively;    MV;    methyl viologen;    RWC;    relative water content;    TL;    chorophyll thermoluminescence;   

DOI  :  10.1016/S0014-5793(00)01165-0

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

In animal cells, yeast and bacteria, thioredoxins are known to participate in the response to oxidative stress. We recently identified a novel type of plant thioredoxin named CDSP 32 for chloroplastic drought-induced stress protein of 32 kDa. In the present work, we measured comparable increases in the glutathione oxidation ratio and in the level of chlorophyll thermoluminescence, a specific marker for thylakoid lipid peroxidation in Solanum tuberosum plants subjected to drought or oxidative treatments (photooxidative stress, gamma irradiation and methyl viologen spraying). Further, substantial accumulations of CDSP 32 mRNA and protein were revealed upon oxidative treatments. These data show for the first time in plants the induction of a thioredoxin by oxidative stress. We conclude that CDSP 32 may preserve chloroplastic structures against oxidative injury upon drought.

【 授权许可】

Unknown