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American Journal of Microbiology and Biotechnology

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Endophytic Bacteria from Myricaria laxiflora Before- and After- Flooding Stress and the Antioxidant Activity

American Journal of Microbiology and Biotechnology
Vol.2 , No. 1, Publication Date: Mar. 3, 2015, Page: 1-5

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Authors

[1]	Wen Zeng, Hubei Key Lab of Natural Products Research & Development, College of Life Science and Pharmacy, Three Gorges University, Yichang, P. R. China.
[2]	Ting Wang, Hubei Key Lab of Natural Products Research & Development, College of Life Science and Pharmacy, Three Gorges University, Yichang, P. R. China.
[3]	Wei Jiang, Hubei Key Lab of Natural Products Research & Development, College of Life Science and Pharmacy, Three Gorges University, Yichang, P. R. China.
[4]	Yanhong Xue, Hubei Key Lab of Natural Products Research & Development, College of Life Science and Pharmacy, Three Gorges University, Yichang, P. R. China.
[5]	Shiping Liu, Hubei Key Lab of Natural Products Research & Development, College of Life Science and Pharmacy, Three Gorges University, Yichang, P. R. China.

Abstract

Myricaria laxiflora is restricted to the riverbanks of the Yangtze River valley and will be deprived of the original habitat due to the construction of the Three Gorges Dam. These plants grow under flooding and other oxidative stress. Recently, Endophytic bacteria are considered as an important source of antioxidants. In order to dissect the relationship between the endophytic bacteria diversity and the oxidative stress, we isolated totally 84 bacteria from healthy stems, leaves and roots of M. laxiflora before- and after- flooding stress. The antioxidant capacity in vitro analysis showed that 10 endophytic bacteria have strong activity. Most highly active strains were from the host after blooding. Whether before- or after- flooding, the ability order of antioxidant from different tissues was: roots > stems > leaves. All the endeavors are helpful to understand the symbiotic relationship between endophytic bacteria and the host under oxidative stress.

Keywords

Endophytic Bacteria, Myricaria laxiflora, Flooding Stress, Oxidative Stress, Antioxidant Activity

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