Effects of hot and cold temperatures on the survival of oospores produced by United States strains of Phytophthora infestans

被引：28

作者：

Fay, JC ^{[1
]}

Fry, WE ^{[1
]}

机构：

[1] CORNELL UNIV,DEPT PLANT PATHOL,ITHACA,NY 14853

来源：

AMERICAN POTATO JOURNAL | 1997年 / 74卷 / 05期

关键词：

sexual reproduction; ecology; epidemiology;

D O I：

10.1007/BF02851575

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Oospores produced from matings between US strains of Phytophthora infestans were subjected to hot or cold temperatures and then evaluated for viability, based on percent germination in vitro. Of 35 crosses, 3 produced oospores with sufficient germination for replicated assessments of temperature effects. Germination rates were as high as 26%, but the maximum germination percentage varied among crosses. Two additional crosses, one involving isolates from Mexico also had sufficient germination for assessment of temperature effects. Oospores did not germinate after 2 hr treatments at or above 46C, or after 12 hr treatments at 40C. Temperature treatment at -80C suppressed germination. Temperature had a similar effect on oospore germination from all crosses.

引用

页码：315 / 323

页数：9

共 16 条

[1] SPONTANEOUS VARIABILITY OF SINGLE ISOLATES OF PHYTOPHTHORA INFESTANS .I. CULTURAL VARIATION [J].