EFFECT OF TEMPERATURE, FREEZING PERIOD, AND DRYING ON THE SPORULATION OF COCHLIOBOLUS-SATIVUS ON MATURE STEM BASES OF WHEAT

被引：4

作者：

DUCZEK, LJ

WILDERMUTH, GB

机构：

[1] Research Station, Agriculture Canada, Saskatoon, Saskatchewan, S7N 0X2

[2] Queensland Wheat Research Institute, Toowoomba, QLD

来源：

CANADIAN JOURNAL OF PLANT PATHOLOGY-REVUE CANADIENNE DE PHYTOPATHOLOGIE | 1992年 / 14卷 / 02期

关键词：

D O I：

10.1080/07060669209500889

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Stem pieces (6.5-7.0 cm long) from mature wheat (Triticum aestivum) showing symptoms of common root rot (Cochliobolus sativus) were obtained from plants grown in the field at Toowoomba (Australia) and Saskatoon (Canada) and were exposed to various conditions. At the end of each treatment, stems were incubated at 20-degrees-C and production of conidia of C sativus was measured. Stems exposed for 1 week to temperatures below 1-degrees-C produced fewer conidia than stems exposed to temperatures above 1-degrees-C. Freezing reduced production of conidia but duration of the freezing period had no effect. Numbers of conidia produced on stems frozen at -20-degrees-C for 1 to 6 weeks and then incubated at 20-degrees-C were 1-3% of those that developed on stems incubated at 20-degrees-C continuously. Freezing did not reduce sporulation when stems were dry. Stems at Toowoomba, but not at Saskatoon, produced more conidia when subjected to moist/dry cycles than when kept constantly moist.

引用

页码：130 / 136

页数：7

共 23 条

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