ACTA AGRICULTURAE BOREALI-SINICA ›› 2019, Vol. 34 ›› Issue (S1): 143-152. doi: 10.7668/hbnxb.20190553

Special Issue: Soil fertilizer Drought and water saving

• Tillage and Cultivation·Physiology and Biochemistry • Previous Articles     Next Articles

Effects of Culturable Bacillus in Biological Soil Crust on Seed Germination and Seedling Growth of Wheat

HU Lin, JIN Xinying, LI Jinyu, LI Min, MA Li, LIU Jianli   

  1. College of Biological Sciences and Engineering, North Minzu University, Key Laboratory of Ecosystem Modelling and Application, State Ethnic Affairs Commission, Yinchuan 750021, China
  • Received:2019-07-19 Published:2019-12-28

Abstract: It is aim to reveal the effects of some culturable microorganisms in biological soil crust on plant seed germination and seedling growth. Taking Bacillus strains isolated from the biological soil crust of the southeastern margin of Tengger Desert as materials, wheat as indicator plant, it was studied the effects of culturable Bacillus strains in biological soil crust on plant seed germination and seedling growth under drought stress simulated with 30% PEG6000. The results showed that 76.4% of Bacillus in desert biological soil crusts were drought tolerance less than 50% under drought stress of simulated with 30% PEG6000, and their growth was inhibited. Besides strain Z43 which neither promoted nor inhibited wheat seed germination under simulated drought stress, others showed inhibition. All Bacillus strains in desert soil crusts increased the average total leaf area per plant of wheat seedlings under drought stress simulated with 30% PEG6000, but neither inhibited nor promoted about 7 parameters of seedlings growth and development, such as above ground plant height, main root length, number of roots, water content of aboveground plant, dry weight ratio of above ground to whole plant, fresh weight ratio of aboveground to underground plant and dry weight ratio of aboveground to underground plant. Some strains showed promoting effects on 12 parameters of seedlings growth and development, such as fresh weight of above ground plant, dry weight of above ground plant, diameter of basal stem, volume of roots, fresh weight of roots, dry weight of root, fresh weight of whole plant, water content of roots, fresh weight ratio of aboveground to whole plant, fresh weight ratio of root to whole plant, dry weight ratio of root to whole plant. X51 strain promoted seedling growth strongly. The results provide a reference for elucidating the effects of components in biological soil crust on plants.

Key words: Biological soil crust, Bacillus strains, Wheat, Drought stress

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Cite this article

HU Lin, JIN Xinying, LI Jinyu, LI Min, MA Li, LIU Jianli. Effects of Culturable Bacillus in Biological Soil Crust on Seed Germination and Seedling Growth of Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 143-152. doi: 10.7668/hbnxb.20190553.

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