Scholarlink

<p>The oomycete <i>Phytophthora cinnamomi</i> Rands is a highly destructive invasive pathogen in natural ecosystems and horticultural nurseries in China. Understanding the prevalence of this pathogen is crucial for assessing its ecological impact. This study examined the environmental factors affecting the dissemination and persistence of ST402, a highly pathogenic strain that induces severe basal rot in Chinese hickory (<i>Carya cathayensis</i> Sarg.) in eastern China. After initial growth on vegetable juice agar (V8A) plates and subsequent 24-hour immersion in an incubation solution, strain ST402 produced abundant sporangia and chlamydospores, with active zoospore release detected shortly thereafter. Temperature significantly influenced production; ST402 produced the highest number of sporangia (103.0 per mm<sup>2</sup>) at 25&#xa0;°C, but concurrently yielded the lowest number of chlamydospores (5.4 per mm<sup>2</sup>). The reproduction of ST402 also varied across different pH levels, glucose concentrations, and NaCl concentrations. Furthermore, root wash solutions from 15 plant species in Chinese hickory orchards revealed that extracts from <i>Car. cathayensis</i>, <i>Cinnamomum camphora</i>, <i>Rhododendron simsii</i>, and <i>Castanea mollissima</i> promoted sporangia production. Conversely, extracts from <i>Cin. camphora</i>, <i>Camellia sinensis</i>, <i>Phyllostachys edulis</i>, and <i>Cas. mollissima</i> significantly stimulated chlamydospore production. Our findings demonstrate that <i>P. cinnamomi</i> exhibits substantial sporulation plasticity under abiotic and biotic stresses. This adaptability facilitates its survival, rapid colonization, and subsequent spread in new ecosystems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effects of environmental factors on the in vitro sporulation of Phytophthora cinnamomi, the causal agent of basal rot of Chinese hickory

  • 期刊论文

  • 发表日期：

    2026年5月19日

查看全文
  • Jiayi Wu,
  • Yuanfan Li,
  • Siyuan Zheng,
  • Jinjuan Bai,
  • Zhouyi Tang,
  • Yongjun Wang

摘要

The oomycete Phytophthora cinnamomi Rands is a highly destructive invasive pathogen in natural ecosystems and horticultural nurseries in China. Understanding the prevalence of this pathogen is crucial for assessing its ecological impact. This study examined the environmental factors affecting the dissemination and persistence of ST402, a highly pathogenic strain that induces severe basal rot in Chinese hickory (Carya cathayensis Sarg.) in eastern China. After initial growth on vegetable juice agar (V8A) plates and subsequent 24-hour immersion in an incubation solution, strain ST402 produced abundant sporangia and chlamydospores, with active zoospore release detected shortly thereafter. Temperature significantly influenced production; ST402 produced the highest number of sporangia (103.0 per mm2) at 25 °C, but concurrently yielded the lowest number of chlamydospores (5.4 per mm2). The reproduction of ST402 also varied across different pH levels, glucose concentrations, and NaCl concentrations. Furthermore, root wash solutions from 15 plant species in Chinese hickory orchards revealed that extracts from Car. cathayensis, Cinnamomum camphora, Rhododendron simsii, and Castanea mollissima promoted sporangia production. Conversely, extracts from Cin. camphora, Camellia sinensis, Phyllostachys edulis, and Cas. mollissima significantly stimulated chlamydospore production. Our findings demonstrate that P. cinnamomi exhibits substantial sporulation plasticity under abiotic and biotic stresses. This adaptability facilitates its survival, rapid colonization, and subsequent spread in new ecosystems.