...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Botany >Pre-haustorial resistance to broomrape (Orobanche cumana) in sunflower (Helianthus annuus): cytochemical studies
【24h】

Pre-haustorial resistance to broomrape (Orobanche cumana) in sunflower (Helianthus annuus): cytochemical studies

机译：向日葵（Helianthus annuus）对帚柄（Orobanche cumana）的抽烟前抗性：细胞化学研究

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

Sunflower broomrape (Orobanche cumana Wallr.) is a root holoparasitic angiosperm considered as one of the major constraints for sunflower production in Mediterranean areas. Breeding for resistance is regarded as the most effective, feasible, and environmentally friendly solution to control this parasite. However, the existing sources of genetic resistance are defeated by the continuous emergence of new more virulent races of the parasite. In this work, the interaction between sunflower and O. cumana has been analysed in order to gain insights into the mechanisms involved in resistance. Two sunflower genotypes were selected showing different behaviour against the new race F of O. cumana, HE-39998 (susceptible) and HE-39999 (resistant), and both compatible and incompatible interactions were compared. Pot and Petri dish bioassays revealed that only HE-39998 plants were severely affected, supporting a high number of successfully established broomrapes to mature flowering, whereas in HE-39999 root tubercles were never observed, resistance being associated with browning symptoms of both parasite and host tissues. Histological aspects of the resistance were further investigated. Suberization and protein cross-linking at the cell wall were seen in the resistant sunflower cells in contact with the parasite, preventing parasite penetration and connection to the host vascular system. In addition, fluorescence and confocal laser microscopy (CLM) observations revealed accumulation of phenolic compounds during the incompatible reaction, which is in agreement with these metabolites playing a defensive role during H. annuus–O. cumana interaction.
机译：向日葵b帚（Orobanche cumana Wallr。）是一种根寄生的被子植物，被认为是地中海地区向日葵生产的主要制约因素之一。抗病育种被认为是控制这种寄生虫的最有效，可行和环境友好的解决方案。但是，现有的遗传抗药性源因不断出现新的更具毒性的寄生虫而战败。在这项工作中，已经分析了向日葵和黄瓜的相互作用，以便深入了解抗药性所涉及的机制。选择了两种向日葵基因型，它们分别对新近发生的O. cumana F. HE-39998（易感）和HE-39999（抗性）表现出不同的行为，并比较了相容和不相容的相互作用。盆栽和皮氏培养皿生物测定显示，只有HE-39998植株受到严重影响，支持大量成功建立的扫帚来开花成熟，而在HE-39999中从未观察到根结节，抗药性与寄生虫和寄主的褐变症状有关。组织。抗性的组织学方面进行了进一步研究。在与寄生虫接触的抗性向日葵细胞中观察到了细胞壁上的干化和蛋白质交联，从而阻止了寄生虫的渗透和与宿主血管系统的连接。此外，荧光和共聚焦激光显微镜（CLM）观察显示不相容反应期间酚类化合物的积累，这与这些代谢产物在H.annual-O期间起防御作用相一致。 cumana互动。

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