Arbuscular mycorrhizal fungi improved plant growth and nutrient acquisition of desert ephemeral Plantago minuta under variable soil water conditions

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• 作者：ZhaoYong Shi (1) (2) (3)
  Bede Mickan (3)
  Gu Feng (2)
  YingLong Chen (3) (4)
  
  1. College of Agriculture ; Henan University of Science and Technology ; Luoyang ; 471003 ; China
  2. College of Resources and Environmental Sciences ; China Agricultural University ; Beijing ; 100094 ; China
  3. School of Earth and Environment ; the University of Western Australia ; Crawley ; WA ; 6009 ; Australia
  4. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau ; Institute of Soil and Water Conservation ; Chinese Academy of Sciences and Ministry of Water Resources ; Yangling ; 712100 ; China
  
• 关键词：Plantago minuta ; soil water availability ; nutrient acquisition ; desert ephemeral ; Junggar Basin
• 刊名：Journal of Arid Land
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：7
• 期：3
• 页码：414-420
• 全文大小：707 KB
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• 刊物主题：Physical Geography; Plant Ecology; Sustainable Development;
• 出版者：Springer Berlin Heidelberg

文摘

Desert ephemeral plants play an important role in desert ecosystem. Soil water availability is considered as the major restrictive factor limiting the growth of ephemeral plants. Moreover, arbuscular mycorrhizal fungi (AM fungi) are widely reported to improve the growth of desert ephemerals. The present study aimed to test the hypothesis of that AM fungi could alleviate drought stress of desert ephemeral Plantago minuta, and AM fungal functions reduced with the improvement of soil water content. A pot experiment was carried out with three levels of soil water contents (4.5%, 9.0%, and 15.8% (w/w)), and three AM inoculation treatments (Glomus mosseae, Glomus etunicatum and non-inoculation). The results indicate that mycorrhizal colonization rate decreased with the increase of soil water availability. Inoculation improved plant growth and N, P and K acquisition in both shoots and roots regardless water treatments. When comparing the two fungi, plants inoculated with G. mosseae performed better than those inoculated with G. etunicatum in terms of plant growth and nutrient acquisition. These results showed that ameliorative soil water did not suppress arbuscular mycorrhizal fungal functions in improving growth and nutrient acquisition of desert ephemeral Plantago minuta.