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cje ›› 2012, Vol. 31 ›› Issue (5): 1136-1142.

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Responses of signal transduction substances of Didymodon vinealis  and Bryum argenteum  in biological soil crust to gradual drought stress.

SHI Yong1,2, YANG Xiao-ju1,2, ZHAO Xin1,2**, LI Xin-rong1   

  1. (1Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2Laboratory of Plant Stress Ecophysiology and Biotechnology, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China)
  • Online:2012-05-10 Published:2012-05-10

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Abstract: Didymodon vinealis andBryum argenteum were sampled from biological soil crusts to study the responses of their signal transduction substances to gradual drought stress. With increasing drought stress, the activities of TP H+ATPase and PM H+ATPase in D. vinealis and B. argenteum increased. As a result, the K+ content and turgor pressure increased, and the biosynthesis of drought resistance signal transduction substances were stimulated. ABA had no obvious effects on the signal transduction mechanisms of D. vinealisand B. argenteum. NO was involved in the signal transduction mechanisms of B. argenteum, but had no obvious effects on D. vinealis. Ca2+ played an important role in the signal transduction mechanisms of D. vinealis,butdid not forB. argenteum.

Key words: evaluation of ecological restoration, indicators system, monitoring.