...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mycologia >A STUDY OF THE FUNGAL ENDOPHYTE ACREMONIUM COENOPHIALUM IN THE ROOTS OF TALL FESCUE SEEDLINGS
【24h】

A STUDY OF THE FUNGAL ENDOPHYTE ACREMONIUM COENOPHIALUM IN THE ROOTS OF TALL FESCUE SEEDLINGS

机译：高羊茅幼苗根部真菌内生真菌RE骨CO的研究

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

Tall fescue has formed a mutualistic relationship with the fungal endophyte Acremonium coenophialum. Endophyte-infected plants can have increased growth and survival when compared with endophyte-free plants. Responses to endophyte infection vary and may be host genotype and fungal biotype specific. The mechanism(s) by which endophyte infection confers increased growth and survival is not understood. This research determined the occurrence, distribution, and ultrastructure of endophyte hyphae in the roots of axenically grown tall fescue seedlings. Acremonium coenophialum was recovered from excised roots of endophyte-infected seedlings grown on diverse agar media and from sterile coarse sand. Successful recovery of the isolate varied with seedling age, root type, and growth medium. Overall, 67% of 218 endophyte-infected seedlings contained endophyte in their roots. Root-fungal ultrastructure of agar grown seedlings revealed epiphytic hyphae bearing conidiophores with typical conidia and an electron dense matrix that adhered hyphae to each other and to the root epidermal cell wall. Hyphae were found in regions previously occupied by root epidermal cells, but no direct penetration of intact cells was observed. Electron dense granules within the fungal cytoplasm contained high amounts of phosphorous relative to adjacent tissues. This may benefit endophyte-infected plants in low soil phosphate conditions. [References: 32]
机译：高羊茅已与真菌内生菌顶头孢霉（Acremonium coenophialum）形成了相互关系。与无内生菌的植物相比，被内生菌感染的植物可以提高生长和存活。对内生菌感染的反应各不相同，并且可能是宿主基因型和真菌生物型特异的。尚不了解内生菌感染赋予生长和存活率的机制。这项研究确定了内生真菌高根羊茅幼苗根中内生菌丝的发生，分布和超微结构。从在各种琼脂培养基上生长的内生菌感染幼苗的切下根部和无菌粗砂中回收制顶头孢霉。分离株的成功回收率随幼苗年龄，根系类型和生长培养基的不同而不同。总体而言，在218种受内生菌感染的幼苗中，有67％的根部含有内生菌。琼脂幼苗的根真菌超微结构显示带有附生孢子的附生菌丝，其具有典型的分生孢子和电子密集的基质，该菌丝彼此之间以及与根表皮细胞壁的粘附。在先前被根表皮细胞占据的区域中发现了菌丝，但未观察到完整细胞的直接穿透。相对于邻近组织，真菌细胞质内的电子致密颗粒含有大量的磷。在低土壤磷酸盐条件下，这可能会使受内生细菌感染的植物受益。 [参考：32]

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