Ultrastructure and phylogeny of Ustilago coicis  

作　　者：Jing-ze ZHANG Pei-gang GUAN Gang TAO Mohammad Reza OJAGHIAN Kevin David HYDE 

机构地区：[1]Institute of Biotechnology,College of Agriculture and Biotechnology,Zhejiang University [2]Guizhou Institute of Plant Protection [3]Key Laboratory of Systematic Mycology and Lichenology,Institute of Microbiology,Chinese Academy of Sciences [4]Institutue of Excellence in Fungal Research,School of Science,Mae Fah Luang University

出　　处：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》2013年第4期336-345,共10页浙江大学学报（英文版）B辑（生物医学与生物技术）

基　　金：Project supported by the National Natural Science Foundation of China(No.31070123);the Special Fund for Agro-scientific Research in the Public Interest of China(No.201003004)

摘　　要：Ustilago coicis causes serious smut on Coix lacryma-jobi in Dayang Town,Jinyun County,Zhejiang Province of China.In this paper,ultrastructural assessments on fungus-host interactions and teliospore development are presented,and molecular phylogenetic analyses have been done to elucidate the phylogenetic placement of the taxon.Hyphal growth within infected tissues was both intracellular and intercellular and on the surface of fungus-host interaction,and the fungal cell wall and the invaginated host plasma membrane were separated by a sheath comprising two distinct layers between the fungal cell wall and the invaginated host plasma membrane.Ornamentation development of teliospore walls was unique as they appeared to be originated from the exosporium.In addition,internal transcribed spacer(ITS) and large subunit(LSU) sequence data showed that U.coicis is closely related to Ustilago trichophora which infects grass species of the genus Echinochloa(Poaceae).Ustilago coicis causes serious smut on Coix lacryma-jobi in Dayang Town, Jinyun County, Zhejiang Province of China. In this paper, ultrastructural assessments on fungus-host interactions and teliospore development are presented, and molecular phylogenetic analyses have been done to elucidate the phylogenetic placement of the taxon. Hyphal growth within infected tissues was both intracellular and intercellular and on the surface of fungus-host interaction, and the fungal cell wall and the invaginated host plasma membrane were separated by a sheath com- prising two distinct layers between the fungal cell wall and the invaginated host plasma membrane. Ornamentation development of teliospore walls was unique as they appeared to be originated from the exosporium. In addition, in- ternal transcribed spacer （ITS） and large subunit （LSU） sequence data showed that U. coicis is closely related to Ustilago trichophora which infects grass species of the genus Echinochloa （Poaceae）.

关 键 词：Fungus-host interaction Molecular phylogenetics SMUT Teliospore wall development 

分 类 号：S435.19[农业科学—农业昆虫与害虫防治]