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Pathogenic and biological characterization of Phytophthora capsici isolates from zucchini and pepper in Southeast Spain

机译:西班牙东南部西葫芦和辣椒的疫霉疫霉菌的致病性和生物学特性

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摘要

In this work, isolates from pepper and zucchini were tested for pathogenicity on crops commonly cultivated in Mediterranean greenhouses. Also, morphological and growing features and mating types have been studied to find any differences linked with the plant origin and pathogenicity of each isolate. Three isolates were highly pathogenic on all cucurbitaceous and solanaceous hosts tested and caused root rot and wilting. Eggplant and pepper were moderately susceptible, while zucchini, tomato and cucumber were highly susceptible. No root rot symptoms occurred on the fabaceous plants inoculated with Phytophthora capsici , including bean and pea. Moreover, the pathogen was never reisolated from the roots of fabaceous plants. Other isolate of P. capsici was less pathogenic on cucurbitaceous and solanaceous crops, causing only slight root damages. None of the isolates tested produced chlamydospores, and all belonged to A1 mating type. These findings suggest that beans or peas may be a feasible alternative crop for those Mediterranean greenhouses with a history of root rot due to P. capsici .
机译:在这项工作中,测试了胡椒和西葫芦的分离株对地中海大棚通常种植的农作物的致病性。而且,已经研究了形态和生长特征以及交配类型,以发现与每种分离株的植物起源和致病性有关的任何差异。在所有测试的葫芦科和茄科宿主上,三种分离株均具有高致病性,并导致根腐和枯萎。茄子和辣椒易感,西葫芦,番茄和黄瓜易感。接种辣椒疫霉的豆科和豌豆等豆科植物均未出现根腐病症状。此外,病原从未从未从豆科植物的根中分离出来。辣椒的其他分离株对葫芦科和茄科作物的致病性较小,仅造成轻微的根部损害。测试的所有分离株均未产生衣原体,均属于A1交配型。这些发现表明,豆类或豌豆可能是那些因辣椒引起的根腐病的地中海温室的可行替代作物。

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