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Swainsonine-producing fungal endophytes from major locoweed species in China

Yongtao Yu, Qingmei Zhao, Jianna Wang, Jianhua Wang, Yan Wang, Yumin Song, Guoxia Geng, and Qinfan Li

Toxicon 56(3):9 (2010) PMID 20380845

Locoweeds including the toxic species of Astragalus spp and Oxytropis spp. are widely distributed in the western region of China and result in a chronic neurological disease known as locoism in animals. To determine the presence of swainsonine-producing fungal endophyte of major locoweed species in China, endophytes were isolated from 8 locoweed species that including A. variabilis, A. strictus, O. glacialis, O. kansuensis, O. ochrocepala, O. sericopetala, O. glabra and O. latibracteata. Seven species of locoweed were confirmed contain substantial amounts of swainsonine and infect swainsonine-producing fungal endophyte. These endophytes were classified as Undifilim oxytropis according to the fungal morphology and phylogenetic analysis based on sufficient ITS sequences. PCR-RFLP analysis of IGS region showed that the interspecific or intraspecific variations were present among the endophytes from different locoweed species.

Copyright © 2010 Elsevier Ltd. All rights reserved.

DOI: 10.1016/j.toxicon.2010.03.020
Version: za2963e q8zab q8zbc q8zca q8zd3 q8ze0 q8zf5 q8zg0

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