Influence of Salt Stress on Growth of Transgenic Maize Seedlings with TaNHX2 Gene

doi:10.7668/hbnxb.2014.02.031

Abstract

Abstract: The growth performance, morphological traits and physiology indices between transgenic and non- transgenic maize seedlings (cv. Chang 7-2) under various concentrations of NaCl stress were investigated by Hoag- land solution culture. The results showed that transgenic maize seedlings exhibited resistance to salt, and their growth performance was superior compared to the non-transgenic seedlings. With the increase of salt concentration, the seedling height, root length, fresh weight, dry weight and chlorophyll content of both transgenic maize seedlings and non-transgenic controls decreased, and MDA content increased. But the changing ranges of transgenic maize seedlings were relatively narrower. Under almost all stress concentrations, the seedling height, root length, fresh weight, dry weight and chlorophyll content of transgenic maize seedlings were significantly higher than those of non- transgenic ones, and MDA contents were lower. Therefore, transgenic maize seedlings were apparently more toler- ant to salt stress than the non-transgenic ones.

Key words: Transgenic maize, TaNHX2 gene, Salt stress, Seedling growth, Physiology index

CLC Number:

S513.01

WANG Xiao-li, ZHAO Xin-mei, ZHANG Huan-huan, DONG Yan-hui, SUN Yi. Influence of Salt Stress on Growth of Transgenic Maize Seedlings with TaNHX2 Gene[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(2): 165-169. doi: 10.7668/hbnxb.2014.02.031.

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