植物对硒的吸收转运和形态转化机制

阐述了植物对不同形态硒的吸收、转运和形态转化机制。植物主要吸收水溶性硒,包括部分有机硒、硒酸盐和亚硒酸盐。多数研究表明植物对硒酸盐的主动吸收是通过高亲和力的硫酸盐转运子完成,最近的研究表明磷酸盐可以调节亚硒酸盐的吸收,磷酸盐转运子在亚硒酸盐的主动吸收过程中有重要作用;植物吸收的硒酸盐很快从根部转移到地上部,在叶片中被还原成亚硒酸盐,进而转化为有机硒化物进入其他组织;而亚硒酸盐及其代谢产物主要积累在根部,极少转移到地上部。进入植物体中的硒转化为含硒氨基酸和硒蛋白参与植物的代谢。...

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Published in农业资源与环境学报 Vol. 31; no. 6; pp. 539 - 544
Main Author 王晓芳 陈思杨 罗章 黄青青 乔玉辉 孙宏杰 李花粉
Format Journal Article
LanguageChinese
Published 农业农村部环境保护科研监测所 25.12.2014
中国农业生态环境保护协会
Subjects
吸收
形态
植物
硒
转运
植物
硒
吸收
形态
转运
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ISSN2095-6819
2095-6819

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Summary:阐述了植物对不同形态硒的吸收、转运和形态转化机制。植物主要吸收水溶性硒,包括部分有机硒、硒酸盐和亚硒酸盐。多数研究表明植物对硒酸盐的主动吸收是通过高亲和力的硫酸盐转运子完成,最近的研究表明磷酸盐可以调节亚硒酸盐的吸收,磷酸盐转运子在亚硒酸盐的主动吸收过程中有重要作用;植物吸收的硒酸盐很快从根部转移到地上部,在叶片中被还原成亚硒酸盐,进而转化为有机硒化物进入其他组织;而亚硒酸盐及其代谢产物主要积累在根部,极少转移到地上部。进入植物体中的硒转化为含硒氨基酸和硒蛋白参与植物的代谢。
Bibliography:12-1437/S
WANG Xiao-fang, CHEN Si-yang, LUO Zhang, HUANG Qing-qing, QIAO Yu-hui, SUN Hong-jie, LI Hua-fen（ 1.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; 2.Agricultural Comprehensive Development Office of Boshan, Zibo 255200, China）
In this review, we summarized the uptake, translocation and metabolism mechanisms of selenium（Se）in plants. Water-soluble Se, including selenate, selenite and some organic selenium, was the predominant form taken up by plants. The active uptake of selenate in plant could be mediated by high affinity sulfate transporters. The mechanism of selenite uptake was not well understood, however, recent studies suggested that selenite uptake was probably mediated by Pi transporters. The translocation of Se from root to shoot was dependent on the form of Se supplied. The selenate taken up by plants was readily translocated to the shoots and reduced to selenite in leaves, then converted to organic Se compound. By contrast, most of the se
ISSN:2095-6819
2095-6819