Phosphate Uptake from Phytate Due to Hyphae-Mediated Phytase Activity by Arbuscular Mycorrhizal Maize

Frontiers in Plant Science
Xin-Xin WangThomas W Kuyper

Abstract

Phytate is the most abundant form of soil organic phosphorus (P). Increased P nutrition of arbuscular mycorrhizal plants derived from phytate has been repeatedly reported. Earlier studies assessed acid phosphatase rather than phytase as an indication of mycorrhizal fungi-mediated phytate use. We investigated the effect of mycorrhizal hyphae-mediated phytase activity on P uptake by maize. Two maize (Zea mays L.) cultivars, non-inoculated or inoculated with the arbuscular mycorrhizal fungi Funneliformis mosseae or Claroideoglomus etunicatum, were grown for 45 days in two-compartment rhizoboxes, containing a root compartment and a hyphal compartment. The soil in the hyphal compartment was supplemented with 20, 100, and 200 mg P kg(-1) soil as calcium phytate. We measured activity of phytase and acid phosphatase in the hyphal compartment, hyphal length density, P uptake, and plant biomass. Our results showed: (1) phytate addition increased phytase and acid phosphatase activity, and resulted in larger P uptake and plant biomass; (2) increases in P uptake and biomass were correlated with phytase activity but not with acid phosphatase activity; (3) lower phytate addition rate increased, but higher addition rate decreased hyphal length...Continue Reading

References

May 25, 2002·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Benjamin L TurnerIan D McKelvie
Jan 12, 2011·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Guillermo A GalvánOlga E Scholten

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Citations

Sep 13, 2019·The New Phytologist·François P TesteIan A Dickie
Jun 28, 2018·Environmental Science and Pollution Research International·Fangdong ZhanYoushan Wang
Mar 27, 2021·Canadian Journal of Microbiology·Fei WuLinping Zhang

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