酸性土壤上植物应对铝胁迫的过程与机制

应用生态学报

酸性土壤上植物应对铝胁迫的过程与机制

赵天龙,解光宁,张晓霞,邱林权,王娜,张素芝^**

(四川农业大学玉米所农业部西南玉米生物学与遗传育种重点实验室, 成都 611130)

出版日期:2013-10-18 发布日期:2013-10-18

Process and mechanism of plants in overcoming acid soil aluminum stress.

ZHAO Tian-long, XIE Guang-ning, ZHANG Xiao-xia, QIU Lin-quan, WANG Na, ZHANG Su-zhi

(Ministry of Agriculture Key Laboratory of Biology and Genetic Improvement of Maize in Southwest Region, Maize Research Institute, Sichuan Agricultural University, Chengdu 611130, China)

Online:2013-10-18 Published:2013-10-18

摘要/Abstract

摘要： 铝胁迫是酸性土壤上影响作物产量最重要的因素之一.目前,全球土壤酸化程度进一步加剧了铝胁迫.植物可通过将铝离子与有机酸螯合储藏于液泡和从根系中排出铝毒.排出铝毒主要通过苹果酸转运蛋白ALMT和柠檬酸转运蛋白MATE的跨膜运输来实现.编码ABC转运蛋白和锌指转录因子的基因与植物抗铝胁迫有关.这些抗铝毒基因的鉴别使得通过转基因和分子标记辅助育种等生物技术来提高农作物的抗铝毒能力成为可能.最后提出了植物抗铝胁迫研究中需要解决的关键问题及今后的研究方向.

关键词: 酸性土壤, 铝胁迫, 柠檬酸, 苹果酸

Abstract: Aluminum (Al) stress is one of the most important factors affecting the plant growth on acid soil. Currently, global soil acidification further intensifies the Al stress. Plants can detoxify Al via the chelation of ionic Al and organic acids to store the ionic Al in vacuoles and extrude it from roots. The Al extrusion is mainly performed by the membranelocalized anion channel proteins Al³⁺activated malate transporter (ALMT) and multidrug and toxin extrusion (MATE). The genes encoding ABC transporter and zinc-finger protein conferred plant Al tolerance have also been found. The identification of these Alresistant genes makes it possible to increase the Al resistance of crop plants and enhance their production by the biological methods such as gene transformation and mark-associated breeding. The key problems needed to be solved and the possible directions in the researches of plant Al stress resistance were proposed.

Key words: acid soil, aluminum stress, malate, citrate.

赵天龙,解光宁,张晓霞,邱林权,王娜,张素芝**. 酸性土壤上植物应对铝胁迫的过程与机制[J]. 应用生态学报.

ZHAO Tian-long, XIE Guang-ning, ZHANG Xiao-xia, QIU Lin-quan, WANG Na, ZHANG Su-zhi. Process and mechanism of plants in overcoming acid soil aluminum stress.[J]. Chinese Journal of Applied Ecology.

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