Influence of silicon pretreatment on aluminium toxicity in maize roots

被引：62

作者：

Corrales, I ^{[1
]}

Poschenrieder, C ^{[1
]}

Barcelo, J ^{[1
]}

机构：

[1] UNIV AUTONOMA BARCELONA, FAC SCI, PLANT PHYSIOL LAB, E-08193 Bellaterra, SPAIN

来源：

PLANT AND SOIL | 1997年 / 190卷 / 02期

关键词：

aluminium toxicity; hematoxylin staining; root elongation; silicon; Zea mays L;

D O I：

10.1023/A:1004209828791

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The influence of Si pretreatment on Al toxicity in an Al sensitive maize variety (Zea mays L. var. BR 201 F) was investigated using root elongation rates (RER) and hematoxylin staining as stress indicators. Plants pretreated with 1 mM Si (+ Si) and then exposed for 24 h to Al in nutrient solution without concurrent Si supply in the rooting medium exhibited higher RER than plants that were not pretreated with Si (-Si). The ameliorative effect of Si was due to lower Al uptake and to the exclusion of Al from the root tips in + Si plants. Lower Al uptake in + Si plants was not a consequence of decreased Al availability in the bulk solution. The possible mechanisms of Si-induced increase of Al resistance are discussed.

引用

页码：203 / 209

页数：7

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