Biogeography and Adaptive evolution of Streptomyces Strains from saline environments.
The genus Streptomyces is a widespread genus within the phylum Actinobacteria and has been isolated from various environments worldwide. However, little is known about whether biogeography affects distributional pattern of Streptomyces in salty environments. Such information is essential for understanding the ecology of Streptomyces. Here we analyzed four house-keeping genes (16S rRNA, rpoB, recA and atpD) and salty-tolerance related genes (ectA-ectD) of 38 Streptomyces strains isolated from saline environments in Yunnan and Xinjiang Provinces of western China. The obtained Streptomyces strains were classified into three operational taxonomic units, each comprising habitat-specific geno- and ecotype STs. In combination with expressional variations of salty-tolerance related genes, the statistical analyses showed that spatial distance and environmental factors substantially influenced Streptomyces distribution in saline environments: the former had stronger influence at large spatial scales (>700 km), whereas the latter was influential at large (>700 km) and small spatial scales (<700 km). Plus, the quantitative analyses of salty-tolerence related genes (ectA-D) indicated that Streptomyces strains from salt lakes have higher expression of ectA-D genes and could accumulate larger quantities of ectoine and hydroxyectoine than strains from salt mines, which could help them resist to salinity in the hypersaline environments.
Pharmaceutical deparment, Henan Province People's Hospital, No.7, Wei Wu Road, Zhengzhou, Henan, 450003, China.
Fei
F
Zhao
Pharmaceutical deparment, Henan Province People's Hospital, No.7, Wei Wu Road, Zhengzhou, Henan, 450003, China.
Yu-Hua
YH
Qin
Yunnan WALVAX Biotechnology Co., Ltd, Kunming, 650106, China.
Xin
X
Zheng
Pharmaceutical deparment, Henan Province People's Hospital, No.7, Wei Wu Road, Zhengzhou, Henan, 450003, China.
Hong-Wei
HW
Zhao
Pharmaceutical deparment, Henan Province People's Hospital, No.7, Wei Wu Road, Zhengzhou, Henan, 450003, China.
Dong-Yan
DY
Chai
Yuxi WALVAX Biotechnology Co., Ltd, Kunming, 653100, China.
Wei
W
Li
Yunnan WALVAX Biotechnology Co., Ltd, Kunming, 650106, China.
Ming-Xiang
MX
Pu
Pharmaceutical deparment, Henan Province People's Hospital, No.7, Wei Wu Road, Zhengzhou, Henan, 450003, China.
Xing-Sheng
XS
Zuo
Yunnan WALVAX Biotechnology Co., Ltd, Kunming, 650106, China.
Wen
W
Qian
Yunnan WALVAX Biotechnology Co., Ltd, Kunming, 650106, China.
Ping
P
Ni
Eryuan No. one high school, Dali Bai nationality Prefecture, 671202, China.
Yong
Y
Zhang
Yunnan Weather Modification Center, Kunming, 650034, China.
Han
H
Mei
Pharmaceutical deparment, Henan Province People's Hospital, No.7, Wei Wu Road, Zhengzhou, Henan, 450003, China.|Yunnan WALVAX Biotechnology Co., Ltd, Kunming, 650106, China.|Key Laboratory of Microbial Diversity in Southwest China, Ministry of Education, Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, China.
Song-Tao
ST
He
D005075:Biological Evolution; D002681:China; D017753:Ecosystem; D005798:Genes, Bacterial; D058974:Phylogeography; D055049:Salt Tolerance; D013302:Streptomyces / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology*