Infection Behavior of Venturia nashicola, the Cause of Scab on Asian Pears.
Infection Behavior of Venturia nashicola, the Cause of Scab on Asian Pears.
复制标题
亚洲梨黑星病病原文丘里氏菌 (Venturia nashicola) 的感染行为。
DOI：
10.1094/phyto.2000.90.11.1209
复制
发表时间：
2000
期刊：
影响因子：
3.2
通讯作者：
S. Umemoto
中科院分区：
文献类型：
--
作者：
P. Park;H. Ishii;Y. Adachi;S. Kanematsu;H. Ieki;S. Umemoto
梨黑星病菌是引起亚洲梨黑星病的病原菌。用光学显微镜和电子显微镜观察了中国梨（P.ussuriensis）的抗虫性，以确定梨的抗病机制。感染的早期阶段是相似的敏感品种。Kosui，抗性cv。Kinchaku，和非主机欧洲梨（P. communis）品种。佛兰芒美人梨生轮枝菌仅能穿透梨叶片的角质层，在3个品种上均能形成表皮下菌丝。菌丝主要分布于叶片的果胶层中，不能穿透表皮细胞的细胞质。这种对真菌生长的限制表明，由感染菌丝或表皮下菌丝释放的果胶酶可能在感染中起重要作用。抗病梨品种果胶层的表皮下菌丝发生了超微结构的改变，并伴随着真菌细胞的死亡。相反，在感病梨品种中真菌细胞完整，表明存在抗性机制。
ABSTRACT The infection of Japanese pear by Venturia nashicola, the cause of scab on Asian pears (Japanese pear, Pyrus pylifolia var. culta; Chinese pear, P. ussuriensis), was examined using light and electron microscopy to determine the mechanism of resistance in pears. Early stages of infection were similar on the susceptible cv. Kosui, the resistant cv. Kinchaku, and the nonhost European pear (P. communis) cv. Flemish Beauty. V. nashicola penetrated only the cuticle layer on pear leaves and formed subcuticular hyphae on all three cultivars. Hyphae were localized in the pectin layer of pear leaves and never penetrated into the cytoplasm of epidermal cells. This restriction of fungal growth suggested that pectinases released by infection hyphae or subcuticular hyphae may be important in infection. Subcuticular hyphae were modified ultrastructurally in the pectin layer of resistant pear cultivars accompanied by fungal cell death. In contrast, fungal cells appeared intact in susceptible pear cultivars, suggesting the existence of resistance mechanisms.
在高pH值中使用柠檬酸铅作为电子显微镜中的电子斑点。
影响因子：
7.8
作者：
REYNOLDS, E S
通讯作者：
REYNOLDS, E S