Over-expression of PaSOD in transgenic potato enhances photosynthetic performance under drought
Over-expression of PaSOD in transgenic potato enhances photosynthetic performance under drought
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DOI：
10.1007/s10535-012-0277-x
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发表时间：
2013-06
影响因子：
1.5
通讯作者：
A. Pal;K. Acharya;S. K. Vats;S. Kumar;P. Ahuja
中科院分区：
文献类型：
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作者：
A. Pal;K. Acharya;S. K. Vats;S. Kumar;P. Ahuja
Drought stress enhances the production of superoxide radical (O2._) and superoxide dismutase catalyses dismutation of it to H2O2and O2, and hence provides a first line of defense against oxidative stress. Over-expression of a cytosoliccopper-zinc superoxide dismutase, cloned fromPotentilla atrosanguinea(PaSOD), in potato (Solanum tuberosumssp.tuberosumL. cv. Kufri Sutlej) resulted in enhanced net photosynthetic rates (PN) and stomatal conductance (gs) compared to that in the wild type (WT) plants under control (irrigated) as well as drought stress conditions. Drought stress declined leaf water potential, PN, gs, photosystem II activity, and chlorophyll content, but increased proline and O2._content more in WT than transgenic potato plants (SS5). The significantly higher SOD activity in SS5 coincided well with lower O2._content suggesting its role in maintaining higher gsand PNin transgenic potato plants.
