HR: 0800h
AN: B41C-0209    [Abstracts]
TI: Studies on Actinomycetal Resources under Extreme Environments in the West of China
AU: * Li, W
EM: wjli@ynu.edu.cn
AF: Yunnan Institute of Microbiology, Yunnan University, No.2 North Road of Green Lake, Kunming, 650091 China
AB: Abstracts: Actinomycetes play a quite important role in natural ecological system and they are also profile producers of antibiotics, antitumor agents, enzymes, enzyme inhibitors and immunomodifiers. which have been widely applied in industry, agriculture, forestry and pharmaceutical industry. In the past, the research work on actinomycetes was mainly concentrated on that of common habitats. Actinomycetes resources under extreme environments (including extreme high and low temperature, extreme high or low pH, high salt concentration etc.) have received comparatively little attention from microbiologists. Actinomycetes are regarded as one kind of sideline microorganisms and those under extreme environments are better materials for biological evolution and phylogenetic development in research. There are much more unknown species and much more worth researching for actinomycetes under extreme environments. There are many extreme environmental resources in the west of China. For example, wide range snow-mountains, basified soil and lakes, widely distributed acid and alkaline hot-springs in Yunnan provinces; more than 73.3 million hektares basified soil and salt lakes in Xinjiang Province and many unusual environments in Qinghai Province and other western Provinces. They were mostly precious natural resources and were destroyed, relatively fewer can provided us with unique conditions for study on actinomycetal resources under extreme environments. In recent years, our main work was focusing on study of extremophilic actinomycetal resources in the west of China by using conventional cultivation-methods and culture-independent methods (PCR-clone and DGGE/TGGE, etc), Results showed that large amount of unknown microbial resources (including actinomycetal resources) existed in natural extreme environments. Additionally, lots of new taxa were isolated and characterized using a polyphasic approach. Further, we got some new compounds with different bioactivities from these Actinomyceteal resources. Herewith some results of our research work in these years.
UR: http://www.ynu.edu.cn
DE: 0456 Life in extreme environments
SC: Biogeosciences [B]
MN: Fall Meeting 2005