Effect of the Epichloё endophyte on the soil nematode community in the rhizosphere of Achnatherum inebrians

doi:10.11686/cyxb2015308

Abstract

Abstract: The aim of this study was to determine the effect of the Epichloё endophyte on soil nematodes and their community characteristics in the rhizosphere of Achnatherum inebrians. Soil nematodes were isolated and identified from the rhizosphere of A. inebrians plants grown with (E+) or without (E-) the Epichloё endophyte. A total of 11889 soil nematodes were collected, belonging to 37 genera, 22 families, six orders, and two classes. The individual density of soil nematodes was higher in soil of E+ plants than in soil of E- plants. The generic number, Shannon-Wiener index, Pielou index, and Margalef index were lower in E+ soil than in E- soil, whereas the diversity index did not differ significantly between the two treatments. The results suggested that the Epichloё endophyte had a limited effect on the diversity of soil nematodes of A. inebrians. The maturity index (MI) of soil nematodes was significantly higher in the E+ soil than in the E- soil, whereas the plant parasite index (PPI) and PPI/MI were significantly lower in the E+ soil than in the E- soil. The presence of the Epichloё endophyte had a significant effect on MI, PPI, and PPI/MI. These results show that the Epichloё endophyte can change the composition of functional groups of soil nematodes, especially that of plant-parasitic nematodes.

GUO Chang-Hui, LI Xiu-Zhang, LIU Li, CAO Jian-Xin, LI Chun-Jie. Effect of the Epichloё endophyte on the soil nematode community in the rhizosphere of Achnatherum inebrians[J]. Acta Prataculturae Sinica, 2016, 25(4): 140-148.

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