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Title 

Transgenic poplar expressing codA exhibits enhanced growth and abiotic stress tolerance

Authors 

Q KeZ WangChang Yoon JiJae Cheol JeongHaeng Soon LeeH LiB XuX DengSang Soo Kwak

Publisher 

Elsevier

Issue Date 

2016

Citation 

Plant Physiology & Biochemistry, vol. 100, no. 0, pp. 75-84

Abstract 

Glycine betaine (GB), a compatible solute, effectively stabilizes the structure and function of macromolecules and enhances abiotic stress tolerance in plants. We generated transgenic poplar plants (Populus alba×Populus glandulosa) expressing a bacterial choline oxidase (codA) gene under the control of the oxidative stress-inducible SWPA2 promoter (referred to as SC plants). Among the 13 SC plants generated, three lines (SC4, SC14 and SC21) were established based on codA transcript levels, tolerance to methyl viologen-mediated oxidative stress and Southern blot analysis. Growth was better in SC plants than in non-transgenic (NT) plants, which was related to elevated transcript levels of auxin-response genes. SC plants accumulated higher levels of GB under oxidative stress compared to the NT plants. In addition, SC plants exhibited increased tolerance to drought and salt stress, which was associated with increased efficiency of photosystem II activity. Finally, SC plants maintained lower levels of ion leakage and reactive oxygen species under cold stress compared to the NT plants. These observations suggest that SC plants might be useful for reforestation on global marginal lands, including desertification and reclaimed areas.

ISSN 

0981-9428

Link 

http://dx.doi.org/10.1016/j.plaphy.2016.01.004

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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