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Journal of Microbiology

, Volume 53, Issue 7, pp 454–461 | Cite as

Arbuscular mycorrhizal fungal diversity, root colonization, and soil alkaline phosphatase activity in response to maize-wheat rotation and no-tillage in North China

  • Junli Hu
  • Anna Yang
  • Anning Zhu
  • Junhua Wang
  • Jue Dai
  • Ming Hung Wong
  • Xiangui LinEmail author
Microbial Ecology and Environmental Microbiology

Abstract

Monitoring the effects of no-tillage (NT) in comparison with conventional tillage (CT) on soil microbes could improve our understanding of soil biochemical processes and thus help us to develop sound management strategies. The objective of this study was to compare the species composition and ecological function of soil arbuscular mycorrhizal (AM) fungi during the growth and rotation of crops under NT and CT. From late June 2009 to early June 2010, 32 topsoil (0–15 cm) samples from four individual plots per treatment (CT and NT) were collected at both the jointing and maturation stages of maize (Zea mays L.) and wheat (Triticum aestivum L.) from a long-term experimental field that was established in an Aquic Inceptisol in North China in June 2006. The AM fungal spores were isolated and identified and then used to calculate species diversity indices, including the Shannon- Wiener index (H’), Evenness (E), and Simpson’s index (D). The root mycorrhizal colonization and soil alkaline phosphatase activity were also determined. A total of 34 species of AM fungi within nine genera were recorded. Compared with NT, CT negatively affected the soil AM fungal community at the maize sowing stage, leading to decreases in the average diversity indices (from 2.12, 0.79, and 0.82 to 1.79, 0.72, and 0.74 for H’, E, and D, respectively), root mycorrhizal colonization (from 28% to 20%), soil alkaline phosphatase activity (from 0.24 to 0.19 mg/g/24 h) and available phosphorus concentration (from 17.4 to 10.5 mg/kg) at the maize jointing stage. However, reductions in diversity indices of H’, E, and D were restored to 2.20, 0.81, and 0.84, respectively, at the maize maturation stage. CT should affect the community again at the wheat sowing stage; however, a similar restoration in the species diversity of AM fungi was completed before the wheat jointing stage, and the highest Jaccard index (0.800) for similarity in the species composition of soil AM fungi between CT and NT was recorded at the wheat maturation stage. Our results also demonstrated that NT resulted in the positive protection of the community structure of AM fungi and played an important role in maintaining their functionality especially for maize seedlings.

Keywords

functionality jointing stage maturation stage restoration species richness spore density 

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Copyright information

© The Microbiological Society of Korea and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Junli Hu
    • 1
    • 3
  • Anna Yang
    • 2
  • Anning Zhu
    • 1
  • Junhua Wang
    • 1
    • 3
  • Jue Dai
    • 1
    • 3
  • Ming Hung Wong
    • 3
    • 4
    • 5
  • Xiangui Lin
    • 1
    • 3
    Email author
  1. 1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil ScienceChinese Academy of SciencesNanjingP. R. China
  2. 2.Provincial Key Laboratory of Biotic Environment and Ecological Security in AnhuiCollege of Life Sciences, Anhui Normal UniversityWuhuP. R. China
  3. 3.Joint Open Laboratory of Soil and the Environment, Hong Kong Baptist University and Institute of Soil ScienceChinese Academy of SciencesNanjingP. R. China
  4. 4.Croucher Institute for Environmental SciencesDepartment of Biology, Hong Kong Baptist UniversityKowloon Tong, Hong Kong SARP. R. China
  5. 5.Consortium on Health, Environment, Education and Research, Department of Science and Environmental StudiesThe Hong Kong Institute of EducationTai Po, Hong Kong SARP. R. China

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