A host plant genome (Zizania latifolia) after a century-long endophyte infection

Guo, Longbiao, Qiu, Jie, Han, Zujing, Ye, Zihong, Chen, Chao, Liu, Chuanjun, Xin, Xiufang, Ye, Chu-Yu, Wang, Ying-Ying, Xie, Hongqing, Wang, Yu, Bao, Jiandong, Tang, She, Xu, Jie, Gui, Yijie, Fu, Fei, Wang, Weidi, Zhang, Xingchen, Zhu, Qianhua, Guang, Xuanmin, Wang, Chongzhi, Cui, Haifeng, Cai, Daguang, Ge, Song, Tuskan, Gerald A., Yang, Xiaohan, Qian, Qian, He, Sheng Yang, Wang, Jun, Zhou, Xue-Ping and Fan, Longjiang (2015) A host plant genome (Zizania latifolia) after a century-long endophyte infection Plant Journal, 83 (4). pp. 600-609.

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Abstract

Despite the importance of host-microbe interactions in natural ecosystems, agriculture and medicine, the impact of long-term (especially decades or longer) microbial colonization on the dynamics of host genomes is not well understood. The vegetable crop Jiaobai' with enlarged edible stems was domesticated from wild Zizania latifolia (Oryzeae) approximately 2000years ago as a result of persistent infection by a fungal endophyte, Ustilago esculenta. Asexual propagation via infected rhizomes is the only means of Jiaobai production, and the Z.latifolia-endophyte complex has been maintained continuously for two centuries. Here, genomic analysis revealed that cultivated Z.latifolia has a significantly smaller repertoire of immune receptors compared with wild Z.latifolia. There are widespread gene losses/mutations and expression changes in the plant-pathogen interaction pathway in Jiaobai. These results show that continuous long-standing endophyte association can have a major effect on the evolution of the structural and transcriptomic components of the host genome. Significance Statement This study reports the genome of Jiaobai, a unique crop species domesticated from wild Zizania latifolia (Oryzeae) as a consequence of persistent infection by a fungal endophyte. Cultivated Z.latifolia (Jiaobai') has a significantly smaller repertoire of immune receptors compared with wild Z.latifolia, showing that continuous long-standing endophyte association can have a major effect on the evolution of the host genome.

Document Type: Article
Additional Information: Times Cited: 0
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
ISSN: 0960-7412
Projects: Future Ocean
Date Deposited: 18 Oct 2016 03:46
Last Modified: 18 Oct 2016 03:46
URI: http://eprints.uni-kiel.de/id/eprint/32500

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