文档介绍：18 第三届全国农业环境科学学术研讨会论文集 2009 年 10 月
UV-B 辐射增强对水稻稻瘟病菌
(Magnaporthe grisea)生长和产孢的影响
赵颖1,2,祖艳群 1,李元1*
(1. 云南农业大学资源与环境学院,云南昆明 650201; 2. 云南农业大学农学与生物技术学院,云南昆明 650201)
摘要:在 UV-B 辐射增强条件下,在 UV-B 不同剂量作用下,研究了水稻稻瘟病菌(Magnaporthe grisea)菌丝的
生长速率、菌落直径、菌落形态、菌丝形态及产孢量。结果表明:UV-B 辐射增强可延缓稻瘟病菌的生长,导致菌
丝生长速率和产孢量均显著下降(P< )。同一 UV-B 辐射强度下,不同的辐射时间对稻瘟病菌菌丝生长速率和
菌落直径的影响没有显著性差异(P> )。在 和 kJ·m-2 强度下,不同的辐射剂量对病菌产孢量的影响有显
著性差异(P< )。在 UV-B 辐射增强条件下,病菌采取与植物类似的形态学变化来抵御 UV-B 辐射增强的伤害,
经 UV-B 辐射处理后的病菌菌落颜色加深,菌丝分布更加致密。
关键词:UV-B 辐射;稻瘟病菌;菌丝;生长速度;产孢量
Effects of Enhanced UV-B Radiation on Growth and Sporulation Quantity of Blast Isolate
Magnaporthe grisea
ZHAO Ying1,2, ZU Yan-qun1, LI Yuan1
( of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; of Agronomy
and Biotechnology, Yunnan Agricultural University,Kunming 650201, China)
Abstract: The effects of UV-B radiation on the grown character and the spore quantity of blast isolate Magnaporthe grisea were
studied. Results showed that supplemental UV-B radiation resulted in growth slowly, decreased in hypal growth rate and
sporulation quantity of Magnaporthe grisea (P< ) significantly. Under the same intensity of UV-B radiation, difference in
radiation time on hypal growth rate and colony diameter of Magnaporthe grisea was not observed (P> ). Under and
kJ·m-