Effects of interactions between a grass endophyte and an arbuscular mycorrhizal fungus on perennial ryegrass growth

doi:10.11686/cyxb2016445

Abstract

Abstract: The aim of this study was to determine the effects of interactions between an arbuscular mycorrhizal (AM) fungus and an endophyte on the growth of perennial ryegrass (Lolium perenne). Ryegrass plants were grown in pots in a greenhouse and inoculated with the AM fungus Claroideoglomus etunicatum, Rhizophagus intraradices, and a mixture of C. etunicatum and R. intraradices, and then plant height, root length, biomass, phosphorus content, soluble sugars content, soluble protein content, and photosynthetic indexes were monitored. The results showed that the average AM colonization by C. etunicatum, R. intraradices, and the mixture of both species was 44.04%, 34.13%, and 41.13%, respectively. The average AM colonization was 22.28% lower in endophyte-infected ryegrass than in endophyte-free ryegrass. Both the AM fungus and the endophyte increased the morphological, physiological, and biochemical indexes of perennial ryegrass. The total P content, total dry weight, photosynthetic rate, total soluble sugars content, and soluble protein content was 48.21%, 21.12%, 73.53%, 147.12%, and 24.27% higher, respectively, in the plants co-inoculated with C. etunicatum and grass endophyte than in uninoculated plants. Both fungi enhanced shoot growth and root growth, but in general, the AM fungus significantly increased shoot and root growth, while the endophyte mainly increased the shoot growth of perennial ryegrass.

LI Fang, LI Yan-Zhong, DUAN Ting-Yu. Effects of interactions between a grass endophyte and an arbuscular mycorrhizal fungus on perennial ryegrass growth[J]. Acta Prataculturae Sinica, 2017, 26(9): 132-140.

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