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

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Abstract

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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Acknowledgments

This work was supported by Natural Science Foundation Project of Hei Long Jiang Province (C200518) and Research Foundation of Northeast Forestry University.

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  1. Alkali Soil Natural Environmental Science Center (ASNESC), Stress Molecular Biology Laboratory, Northeast Forestry University, Harbin, 150040, P.R. China

    Yuxiang Cheng & Mei Long

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  1. Yuxiang Cheng
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  2. Mei Long
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Correspondence to Yuxiang Cheng.

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Cheng, Y., Long, M. A cytosolic NADP-malic enzyme gene from rice (Oryza sativa L.) confers salt tolerance in transgenic Arabidopsis . Biotechnol Lett 29, 1129–1134 (2007). https://doi.org/10.1007/s10529-007-9347-0

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  • DOI: https://doi.org/10.1007/s10529-007-9347-0

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