| A fungus strain of Botrytis and its crust effect |
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| DOI：10.7606/j.issn.1000-7601.2012.05.37 |
| Key Words: Fungus exopolysaccharides microbiotic crust water retention |
| Author Name | Affiliation | | DENG Zhenshang | The Life-science Department of Yanan University, Yan'an, Shaanxi 716000, China | | ZHAO Jiafu | The Life-science Department of Yanan University, Yan'an, Shaanxi 716000, China
Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Guiyang, Guizhou 550025, China | | LEIChao | The Life-science Department of Yanan University, Yan'an, Shaanxi 716000, China | | LI Jun | Yan'an Institute of Microbiology, Yan'an, Shaanxi 716000, China | | WEI Gehong | College of Life Science, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A fungus strain was isolated from the underlayer of biological crusts in Maowusu desert. According to the analysis of morphology, this strain was identified as Botrytis. It could secrete the massive mucopol
ysaccharide during the growth, the viscosity reached 9 860 mPa·s, and the yield of mucopolysaccharide reached 19.246 g/L, after having been cultivated for 3d in liquid shake flask. Moreover, the components of polysaccharide were assayed by
use of TLC. The results showed that mucopolysaccharide released by this fungus consisted of the D-mannose and D galactose. If a fungal culturing solution was sprinkled on shifting sand surface, a microbiotic crust of 8.2 mm conglutinating sand could be formed. The crust can not only stabilize moving sand but also can slower the rate of soil moisture evaporation. These show its great application potential in desertification control, restoration and protection of the ecological environment. |
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