NDLI: Overexpression of Tamarix albiflonum TaMnSOD increases drought tolerance in transgenic cotton

Content Provider	Springer Nature Link
Author	Zhang, Dao Yuan Yang, Hong Lan Li, Xiao Shuang Li, Hai Yan Wang, Yu Chen
Copyright Year	2014
Abstract	Drought is a major environmental stress that limits cotton (Gossypium hirsutum L.) production worldwide. TaMnSOD plays a crucial role as a peroxidation scavenger. In this study, TaMnSOD cDNA of Tamarix albiflonum was overexpressed in the cotton cultivar fy11 by Agrobacterium tumefaciens-mediated transformation. The transformed plants were assessed by gDNA PCR, RT-PCR and DNA gel blot analysis. The physiological and biochemical characters of two independent transgenic lines and control plants were tested and compared, and the morphological traits (biomass, root and lateral root length, leaf number) were also detected after recovery from water-withholding stress. When water was withheld from pot-grown 6-week-old seedlings for 18 days (watering to 8 % of field capacity), transgenic cotton plants accumulated more proline and soluble sugar than wild-type plants (WT). The activity of antioxidant enzymes such as superoxide dismutase and peroxidase was enhanced in transgenic plants under drought stress. Cell membrane integrity was also considerably improved under water stress, as indicated by reduced malondialdehyde content relative to control plants. Furthermore, net photosynthesis, stomatal conductance and transpiration rate were increased in transgenic plants compared with wild type. Transgenic cotton showed increases in biomass as well as root and leaf systems compared with WT after 2 weeks recovery from stress. These results suggest that TaMnSOD transgenic cotton plants acquired improved drought tolerance through enhanced development of the root and leaf system and the regulation of superoxide scavenging.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	34
Issue Number	1
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-21
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Overexpression TaMnSOD Transgenic cotton Drought tolerance Physiology Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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