摘要
重庆市涪陵榨菜根肿病标样经扫描电镜观察 ,其休眠孢子囊近球形 ,孢壁不光滑 ,直径为 2 .1～ 2 .6 μm ;休眠孢子囊萌发产生双鞭毛游动孢子。结合症状特征 ,鉴定为十字花科根肿病 (PlasmodiophorabrassicaeWoron)。该菌的休眠孢子囊萌发的最适温度为 2 4℃ ,最适pH值为 6 .2 ,致死温度为 4 5℃ 。
Scanning electron microscopic examination of the diseased stem mustard specimens collected from Fuling, Chongqing revealed that the resting sporangia of the pathogen of club root had a coarse wall and were 2.1～2.6 μm in diameter and subglobose in shape, and that they produced biflagellate zoospores when germinating. Based on such results and the symptom characteristics of the diseased hosts, the pathogen was identified as Plasmoliophora brassicae woron. The optimum temperature and pH for the germination of its resting sporangia were 24℃ and 6.2, respectively, and their lethal temperature was 45℃. Lighting significantly inhibited their germination.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2002年第6期539-541,共3页
Journal of Southwest Agricultural University
基金
1 999年度重庆市科委重大科研项目
