Molecular approaches unravel the mechanism of acid soil tolerance in plants

被引:111
作者
Bian, Miao [1 ,2 ,3 ]
Zhou, Meixue [1 ]
Sun, Dongfa [2 ]
Li, Chengdao [3 ]
机构
[1] Univ Tasmania, Tasmanian Inst Agr, Kings Meadows, Tas 7249, Australia
[2] Huazhong Agr Univ, Coll Plant Sci & Technol, Wuhan 430070, Hubei, Peoples R China
[3] Baron Hay Court, Dept Agr Food WA, 3 Baron Hay Court, South Perth, WA 6155, Australia
来源
CROP JOURNAL | 2013年 / 1卷 / 02期
关键词
Soil acidity; Aluminum; Marker-assisted selection; Mechanism;
D O I
10.1016/j.cj.2013.08.002
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Acid soil is a worldwide problemto plant production. Acid toxicity is mainly caused by a lack of essential nutrients in the soil and excessive toxic metals in the plant root zone. Of the toxic metals, aluminum (Al) is the most prevalent and most toxic. Plant species have evolved to variable levels of tolerance to aluminum enabling breeding of high Al-tolerant cultivars. Physiological and molecular approaches have revealed some mechanisms of Al toxicity in higher plants. Mechanisms of plant tolerance to Al stress include: 1) exclusion of Al from the root tips, and 2) absorbance, but tolerance of Al in root cells. Organic acid exudation to chelate Al is a feature shared by many higher plants. The future challenge for Al tolerance studies is the identification of novel tolerance mechanisms and the combination of different mechanisms to achieve higher tolerance. Molecular approaches have led to significant progress in explaining mechanisms and detection of genes responsible for Al tolerance. Gene-specific molecular markers offer better options for marker-assisted selection in breeding programs than linked marker strategies. This paper mainly focuses on recent progress in the use of molecular approaches in Al tolerance research. Crown Copyright (C) 2013 Production and hosting by Elsevier B.V. on behalf of Crop Science Society of China and Institute of Crop Science, CAAS. All rights reserved.
引用
收藏
页码:91 / 104
页数:14
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