其他根结线虫物种对番茄和除虫菊植株上北方根结线虫的诱导抗性

Induced Resistance to Meloidogyne hapla by other Meloidogyne species on Tomato and Pyrethrum Plants.

作者信息

Ogallo J L, McClure M A

出版信息

J Nematol. 1995 Dec;27(4):441-7.

PMID:19277310

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2619633/

Abstract

Advance inoculation of the tomato cv. Celebrity or the pyrethrum clone 223 with host-incompatible Meloidogyne incognita or M. javanica elicited induced resistance to host-compatible M. hapla in pot and field experiments. Induced resistance increased with the length of the time between inoculations and with the population density of the induction inoculum. Optimum interval before challenge inoculation, or population density of inoculum for inducing resistance, was 10 days, or 5,000 infective nematodes per 500-cm(3) pot. The induced resistance suppressed population increase of M. hapla by 84% on potted tomato, 72% on potted pyrethrum, and 55% on field-grown pyrethrum seedlings, relative to unprotected treatments. Pyrethrum seedlings inoculated with M. javanica 10 days before infection with M. hapla were not stunted, whereas those that did not receive the advance inoculum were stunted 33% in pots and 36% in field plots. The results indicated that advance infection of plants with incompatible or mildly virulent nematode species induced resistance to normally compatible nematodes and that the induced resistance response may have potential as a biological control method for plant nematodes.

摘要

用与寄主不亲和的南方根结线虫或爪哇根结线虫预先接种番茄品种“名人”或除虫菊克隆223，在盆栽和田间试验中引发了对寄主亲和性北方根结线虫的诱导抗性。诱导抗性随着两次接种之间的时间长度以及诱导接种物的种群密度增加。挑战接种前的最佳间隔时间或诱导抗性的接种物种群密度为10天，或每500立方厘米盆栽5000条感染性线虫。相对于未保护的处理，诱导抗性使盆栽番茄上北方根结线虫的种群增长减少了84%，盆栽除虫菊上减少了72%，田间种植的除虫菊幼苗上减少了55%。在感染北方根结线虫前10天用爪哇根结线虫接种的除虫菊幼苗没有发育不良，而未接受预先接种的幼苗在盆栽中发育不良33%，在田间地块中发育不良36%。结果表明，用不亲和或轻度致病的线虫物种预先感染植物可诱导对通常亲和的线虫产生抗性，并且诱导抗性反应可能具有作为植物线虫生物防治方法的潜力。