INCIDENCE OF A ROOT ROT FUNGUS IN A DISEASED ALFALFA SOIL OF CENTRAL ALBERTA

Author:

DAMIRGI SALIH M.,COOK F. D.,WEBSTER G. R.

Abstract

Alfalfa seedlings were consistently diseased by inoculating 7-day-old seedlings, grown in sterilized sand in glass culture tube assemblies, with various soil dilutions from a diseased alfalfa soil from central Alberta. The root systems of stunted plants had reddish brown lesions, and in the more advanced stages lesions were dark and expanded more than 1 cm above and below the point of initiation. Eventually water-soaked areas developed, and the tissue collapsed. Isolation from lesions on the roots of stunted alfalfa revealed that virtually all lesions contained a fungus belonging to Pythiaceae which was classified as Phytophthora megasperma. Other fungi and bacteria were also isolated from some lesions but pathogenicity tests revealed they did not produce lesions or stunting, whereas the P. megasperma produced severe lesioning and severe stunting of the seedlings. Results indicate that P. megasperma is one of the causes of a complex disease in central Alberta that has become known as "alfalfa sickness."

Publisher

Canadian Science Publishing

Subject

Soil Science

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3