INFLUENCE OF SOIL MATRIC POTENTIAL ON THE DEBILITATION OF OOSPORES OF PYTHIUM-APHANIDERMATUM

被引：7

作者：

MONDAL, SN ^{[1
]}

KAGEYAMA, K ^{[1
]}

HYAKUMACHI, M ^{[1
]}

机构：

[1] GIFU UNIV,UNITED GRAD SCH AGR SCI,FAC AGR,PLANT DIS SCI LAB,GIFU 50111,JAPAN

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 1995年 / 27卷 / 10期

关键词：

D O I：

10.1016/0038-0717(95)00058-M

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

The influence of soil matric potential on the debilitation of oospores of Pythium aphanidermatum was assessed during incubation in Yanagido sandy loam and Kakamigahara clay loam soil in tensiometers at 0, -1, -5, -10 and -15 kPa psi m over a period of 80 days. Germinability in salts solution and viability in corn meal agar of oospores started to decline after 10 days incubation on both soils. Oospores incubated in water saturated soil (0 kPa psi m) rapidly declined in germinability and viability. By 80 days oospores incubated in soils at 0 kPa psi m failed to germinate in salts solution and their viability and pathogenic aggressiveness was decreased significantly (P = 0.05). However, oospores exposed to lower water potentials (-5 to -15 kPa psi m) maintained their germinability, viability and pathogenic aggressiveness.

引用

页码：1319 / 1324

页数：6