A cytosolic NADP-malic enzyme gene from rice (Oryza sativa L.) confers salt tolerance in transgenic Arabidopsis

被引:0
|
作者
Yuxiang Cheng
Mei Long
机构
[1] Northeast Forestry University,Alkali Soil Natural Environmental Science Center (ASNESC), Stress Molecular Biology Laboratory
来源
Biotechnology Letters | 2007年 / 29卷
关键词
NADP-malic enzyme; Rice (; L.); Salt stress;
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中图分类号
学科分类号
摘要
NADP-malic enzyme (NADP-ME, EC 1.1.1.40) functions in many different pathways in plant and may be involved in plant defense such as wound and UV-B radiation. Here, expression of the gene encoding cytosolic NADP-ME (cytoNADP-ME, GenBank Accession No. AY444338) in rice (Oryza sativa L.) seedlings was induced by salt stress (NaCl). NADP-ME activities in leaves and roots of rice also increased in response to NaCl. Transgenic Arabidopsis plants over-expressing rice cytoNADP-ME had a greater salt tolerance at the seedling stage than wild-type plants in MS medium-supplemented with different levels of NaCl. Cytosolic NADPH/NADP+ concentration ratio of transgenic plants was higher than those of wild-type plants. These results suggest that rice cytoNADP-ME confers salt tolerance in transgenic Arabidopsis seedlings.
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页码:1129 / 1134
页数:5
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