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Two Arbuscular Mycorrhizal Fungi Colonizing MaizeUnder Different Phosphorus Regimes in aCompartment Cultivation SystemEnglish Full Text

CHEN BAODONG1, LI XIAOLIN1,2 and P. CHRISTIE21Department of Plant Nutrition, College of Agriculturul Resources and Environmental Sciences, ChinaAgricultural University, Beijing 100094 (China)2Department of Agricultural and Environmental Science, The Queen

Abstract: A modified glass bead compartment cultivation system was used to compare some chemical and biolog-ical properties of the two arbuscular mycorrhizal (AM) fungi Glomus mosseae and Glomus versiforme usingmaize (Zea mays) as the host plant with four added levels of available phosphorus (P). The proportion ofhost plant root length infected was determined at harvest. Shoot and root yields and nutrient concentra-tions were determined, together with the nutrient concentrations in the AM fungal external mycelium. Themorphology of various mycorrhizal structures of the two AM fungi was also compared by microscopic obser-vation. Inoculation with G. mosseae gave higher plant yields than that with G. versghrme, and the two fungiresponded differently in infection rate to areilable phosphorus level. Root infection rate of mycorrhizal maizecolonized by G. mosseae decreased markedly with increasing P level, and there was very poor developmentof the extraradical mpcelium at the highest rate of P addition. In contrast, G. versghrme showed greatertolerance to increasing P level. Elemental analysis showed that phosphorus, copper and zinc concentrationsin the external mycelium differed between the two fungi and were much higher than those in the host plant.Differences in the morphology of the two fungi were also observed.
  • Series:

    (D) Agriculture; (A) Mathematics/ Physics/ Mechanics/ Astronomy

  • Subject:

    Biology; Fundamental Science of Agriculture; Agronomy

  • Classification Code:

    S154.3

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