...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Forest Pathology >Histopathology of primary needles and mortality associated with white pine blister rust in resistant and susceptible Pinus strobus
【24h】

Histopathology of primary needles and mortality associated with white pine blister rust in resistant and susceptible Pinus strobus

机译：抗药性和易感性松花tro中白松疱疱锈病的主要针头组织病理学和死亡率

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

White pine blister rust caused by Cronartium ribicola is a damaging non-native disease of five-needled pines in North America. Efforts to control the disease and mitigate damage to date have been only somewhat effective. Recent efforts to improve the health of eastern white pine and reestablish the tree as a dominant species in the North Central United States have focused on identification and propagation of disease-free eastern white pine (Pinus strobus) growing in areas with a high incidence of blister rust. Many of these selections have been shown to resist infection following artificial inoculation with C. ribicola. In this study, 13 eastern white pine families derived from controlled pollination of selections previously determined to possess putative resistance as well as susceptible selections were inoculated with C. ribicola. Mortality data from inoculation studies show superior survivability in three families with over 60% of seedlings able to survive the 52 week post-inoculation monitoring period compared to 0-10% survival of the most susceptible families. Primary needles were collected for histological analysis from all inoculated families 4 weeks after inoculation and from selected families 6.5 weeks and 38 weeks after inoculation. Histological observations of infection sites show distinct resistance reactions in the families more likely to survive infection based on mortality data. Analysis of the reactions in susceptible families revealed extensive hyphal colonization of the vascular bundle and adjacent mesophyll cells that appear uninhibited by tree responses. In resistant families, collapsed cells adjacent to infection sites, heavy deposition of phenolic compounds and abnormal cell growth were documented more frequently and appear to play an integral role in the ability of these eastern white pine families to impede growth of C. ribicola in primary needle tissue.
机译：北美灰沙门氏菌引起的白松水泡锈病是北美五针松的一种有害的非本土疾病。迄今为止，控制疾病和减轻损害的努力只是有些有效。最近为改善东部白松的健康状况和将其重新树立为美国中北部的主要树种而进行的努力已集中在鉴定和繁殖在水泡高发地区生长的无病东部白松（Pinus strobus）。锈。这些选择中的许多已经显示出在人工接种核糖衣杆菌后能够抵抗感染。在这项研究中，对13个东部白松科家族进行了接种，该家族来自以前确定具有推定抗性的选择的受控授粉，以及易感选择。接种研究的死亡率数据显示，三个科的存活率更高，超过60％的幼苗能够在接种后52周的监测期内存活，而最易感科的存活率为0-10％。在接种后4周，从所有接种的家庭收集原始针，用于组织学分析，在接种后6.5周和38周，从选定的家庭收集主针。感染部位的组织学观察显示，根据死亡率数据，家庭中更有可能幸免于感染的独特耐药性反应。对易感家庭反应的分析表明，血管束和邻近的叶肉细胞大量菌丝菌落，似乎不受树的反应抑制。在耐药家庭中，感染部位附近的细胞坍塌，酚类化合物的大量沉积和异常细胞生长的报道更为频繁，并且似乎在这些东部白松家庭阻止原虫针状衣原体生长的能力中起着不可或缺的作用。组织。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号