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  • CN 62-1070/P
  • ISSN 1000-694X
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Influence of Exopolysaccharides from Dominant Cyanobacteria in Microbiotic Crusts on Seed Germination of Several Desert Herbaceous Plants

  • Gong Jian ,
  • Zhang Bingchang ,
  • Suo Feiya
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  • 1. College of Life Science and Technology, Xinjiang University, Urumqi 830046, China;
    2. Key Laboratory of Biogeography and Bioresources in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China

Received date: 2013-12-31

  Revised date: 2014-03-26

  Online published: 2015-05-20

Abstract

Desert cyanobacteria are important component in microbiotic crusts. Several dominant cyanobacteria species, including Microcoleus vaginatus, Scytonema ocellatum, and Nostoc commune were selected to extract ex-polysaccharides (EPS) and their effects on seed germination of desert plants were investigated. The results indicated that low concentration EPS of M. vaginatus, and S. ocellatum inhabited seed germination of Salsola subcrassa, whereas high concentration EPS promoted seed germination of S. subcrassa. EPS of N. commune showed significant effects on seed germination of S. subcrassa with high concentration (p<0.05). EPS of M. vaginatus showed no obvious effects on seed germination of Nepeta micrantha, however, EPS of S. ocellatum, and N. commune had negative effects on seed germination of N. micrantha. EPS of M. vaginatus, S. ocellatum, and N. commune inhabited seed germination of Hyalea pulchella. EPS of the different cyanobacteria had different effect on seed germination, which could be explained by the differences of composition content of EPS and biological character of different seed.

Cite this article

Gong Jian , Zhang Bingchang , Suo Feiya . Influence of Exopolysaccharides from Dominant Cyanobacteria in Microbiotic Crusts on Seed Germination of Several Desert Herbaceous Plants[J]. Journal of Desert Research, 2015 , 35(3) : 639 -644 . DOI: 10.7522/j.issn.1000-694X.2014.00037

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