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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Microbiol. | doi: 10.3389/fmicb.2019.01695

Effects of seasonal variation on the alkaloids of different ecotypes of Epichloë endophyte–Festuca sinensis associations

 Weihu Lin1*, Yu Kuang1, Jianjun Wang1, Dongdong Duan1, Wenbo Xu1, Pei Tian1*, Nzabanita Clement1, Meining Wang1, Miaomiao Li1 and Bihua Ma1
  • 1Lanzhou University, China

The Epichloë endophyte–Festuca sinensis association produces alkaloids which can protect the host grass F. sinensis from biotic and abiotic stresses. Alkaloid concentrations depend on the genetic predisposition of grass and endophyte, and are affected by the environment. Endophyte infected six ecotypes F. sinensis cultivars were grown in experimental field and greenhouse for two year. Their above ground plant tissues were collected each season to test for peramine, lolitrem B and ergot concentrations. The results showed that seasonal changes affected the peramine, lolitrem B and ergot concentrations of Epichloë endophyte–F. sinensis associations; and these three different alkaloids responded differently to seasonal variation. The peramine concentration of six ecotypes F. sinensis decreased significantly (P < 0.05) from spring to autumn. The lolitrem B concentration of F. sinensis was higher in autumn than in other seasons. Five ecotypes (41, 57, 84, 99 and 141) of F. sinensis ergot concentrations peaked in the summer, and lowered in spring and autumn. In addition, the ecotype has insignificant effect (P > 0.05) on the peramine and lolitrem B concentrations of F. sinensis, but it has a significant impact (P < 0.05) on the ergot concentrations. We concluded that the seasonal variation and ecotypes can influence the alkaloids produced by the F. sinensis–endophyte associations, but the effects of seasonal conditions on the alkaloid concentrations are more pronounced than ecotypes.

Keywords: Alkaloids, Festuca sinensis, Epichloë endophyte, ecotype, Season

Received: 19 Dec 2018; Accepted: 09 Jul 2019.

Edited by:

Giuliano Bonanomi, University of Naples Federico II, Italy

Reviewed by:

Tapan K. Adhya, KIIT University, India
Mohamed IDBELLA, Department of Agriculture, University of Naples Federico II, Italy  

Copyright: © 2019 Lin, Kuang, Wang, Duan, Xu, Tian, Clement, Wang, Li and Ma. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence:
PhD. Weihu Lin, Lanzhou University, Lanzhou, China, linwh17@lzu.edu.cn
Prof. Pei Tian, Lanzhou University, Lanzhou, China, tianp@lzu.edu.cn