Aluminum-induced cell death of barley-root border cells is correlated with peroxidase- and oxalate oxidase-mediated hydrogen peroxide production

被引：75

作者：

Tamás, L ^{[1
]}

Budíková, S ^{[1
]}

Huttová, J ^{[1
]}

Mistrík, I ^{[1
]}

Simonovicová, M ^{[1
]}

Siroká, B ^{[1
]}

机构：

[1] Slovak Acad Sci, Inst Bot, Bratislava 84523, Slovakia

来源：

PLANT CELL REPORTS | 2005年 / 24卷 / 03期

关键词：

aluminum; barley; cell death; hydrogen peroxide; root border cells;

D O I：

10.1007/s00299-005-0939-7

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The function of root border cells (RBC) during aluminum (Al) stress and the involvement of oxalate oxidase, peroxidase and H2O2 generation in Al toxicity were studied in barley roots. Our results suggest that RBC effectively protect the barley root tip from Al relative to the situation in roots cultivated in hydroponics where RBC are not sustained in the area surrounding the root tip. The removal of RBC from Al-treated roots increased root growth inhibition, Al and Evans blue uptake, inhibition of RBC production, the level of dead RBC, peroxidase and oxalate oxidase activity and the production of H2O2. Our results suggest that even though RBC actively produce active oxygen species during Al stress, their role in the protection of root tips against Al toxicity is to chelate Al in their dead cell body.

引用

页码：189 / 194

页数：6

共 32 条

[1]

BAKER CJ, 1994, PLANT CELL TISS ORG, V39, P7, DOI 10.1007/BF00037585

[2] Mechanisms for the generation of reactive oxygen species in plant defence - a broad perspective [J].