头花蓼茎枯病病原的鉴定及生物学特性  

Identification and biological characteristics of Polygonum capitaturn stem wilt pathogen

作　　者：任静[1] 曾桂萍[1,2] 宋莉莎 赵致 李忠[1,2] REN Jing1, ZENG Gui-ping1,2, SONG Li-sha1, ZHAO Zhi1,2, LI Zhong1,2(1Agricultural Col- lege, Guizhou University, Guiyang 550025, China; 2Guizhou Key Laboratory of Propagation and Cultivation on Medicinal Plants, Guiyang 550025, Chin)

机构地区：[1]贵州大学农学院,贵阳550025 [2]贵州省药用植物繁育与种植重点实验室,贵阳550025

出　　处：《植物病理学报》2018年第2期271-274,共4页Acta Phytopathologica Sinica

基　　金：科技部科技惠民计划项目(2013GS520101-08);贵州省药用植物繁育与种植人才基地项目(黔人领发[2013]15号);科技基础性工作专项(2014FY120100);贵州省中药材现代农业产业体系建设项目(GZCYTX2015-0202)

摘　　要：头花蓼（Polygonumcapitatum）系蓼科（Polygo—naceae）蓼属（Polygonum）多年生草本植物，是贵州省苗族人民的“特色苗药”之一，以全草或地上部分人药，具有解毒止痛、利尿通淋之功效。A new fungal disease of stem wilt was found on Polygonum capitatum. The isolate was obtained from diseased field sample. This study was to identify and characterize the isolate. Based on analysis of ITS, EF-1α and β-tubulin sequences, the isolate was placed in Fusarium equiseti clade in phylogenetic tree. In combination of morphological characteristics the fungal isolate was identified as F. equiseti, a new pathogen on Polygonum capitatum. To determine the optimal nutritional and cultural conditions for the pathogen, the biological charac- teristics test was conducted. The results showed that the optimal carbon and nitrogen sources were fructose and sodium nitrate, respectively, and the mycelia was not sensitive to light with the optimum growth temperature was at 28℃ and favorable pH value at 7, while the lethal temperature for mycelia growth was 65℃ for 10 minutes.

关 键 词：头花蓼 生物学特性 茎枯病 多年生草本植物 鉴定 病原 地上部分 利尿通淋 

分 类 号：S432.44[农业科学—植物病理学]