ALUMINIUM SILICON INTERACTIONS IN BARLEY (HORDEUM-VULGARE L) SEEDLINGS

被引：95
|
作者：
HAMMOND, KE
EVANS, DE
HODSON, MJ
机构：
[1] School of Biological and Molecular Sciences, Oxford Brookes University, Headington, OX3 OBP, Oxford, Gipsy Lane
来源：
PLANT AND SOIL | 1995年 / 173卷 / 01期
关键词：
ALUMINUM; BARLEY; HIGHER PLANT; SILICON;
D O I：
10.1007/BF00155521
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
The response of seedlings of the monocot Hordeum vulgare L. cv. Bronze to 0,25 and 50 mu M aluminium in factorial combination with 0, 1.4, 2.0 and 2.8 mM Si was tested in hydroponic culture at pH 4.5. Nutrient solution (500 mu M calcium nitrate) and Al/Si treatments were designed to avoid the precipitation of Al from solution. Silicon treatments gave significant amelioration of the toxic effects of Al on root and shoot growth and restored calcium levels in roots and shoots at harvest to levels approaching those of control plants. Aluminium uptake by roots was also significantly diminished in the presence of Si. Silicon alone gave a slight stimulation of growth, insufficient to explain its ameliorative effect on Al toxicity. The mechanism of the Si effect on Al toxicity in monocotyledons awaits further investigation.
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页码：89 / 95
页数：7
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