Isolation of Pythium oligandrum from Egyptian soil and its mycoparasitic effect on Pythium ultimum var. ultimum the damping-off organism of wheat

被引：13

作者：

Abdelzaher, HMA ^{[1
]}

Elnaghy, MA ^{[1
]}

Fadl-Allah, EM ^{[1
]}

机构：

[1] El Minia Univ, Fac Sci, Dept Bot, El Minia City, Egypt

来源：

MYCOPATHOLOGIA | 1997年 / 139卷 / 02期

关键词：

antagonism; biological control; damping-off; Pythium oligandrum; Pythium ultimum var. ultimum;

D O I：

10.1023/A:1006836703594

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Pythium oligandrum Drechsler bearing spherical sporangia with complex subglobose elements was isolated for the first time in Egypt from agricultural field soil cultivated with alfalfa (Trifolium alexandrinum) in El-Minia, Egypt. This fungus was found to be an active bio-control agent against P. ultimum var. ultimum, the damping-off organism of wheat. In agar plates, P. oligandrum parasitized P. ultimum var. ultimum hyphae with the aid of thin haustorial branches or infection pegs, eventually leading to host destruction. Incorporation of P. oligandrum into carboxymethylcellulose seed coating successfully eliminated pre-emergence damping-off of wheat caused by P. ultimum var. ultimum, whereas Post-emergence damping-off was prevented by adding inocula of P. oligandrum to the soil.

引用

页码：97 / 106

页数：10

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