权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Evolutionary biology of microcyclic rust fungi

微循环锈菌的进化生物学

基本信息

批准号：
09640744
负责人：
ONO Yoshitaka
金额：
$ 1.6万
依托单位：
IBARAKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640744/
关键词：
rust fungi plant parasitic fungi fungus life cycle ecology evolution taxonomy 核型

项目摘要

This study primarily concerned with the nuclear behavior associated in the metabasidium production in relation to the reduction of the life cycle in the rust fungi. In this study, the types of nuclear behaviors associated in the metabasidium production were newly observed for Puccinia circaeae Pers., P. lantanae W. G. Farlow, P. nipponica Dietel, P. patriniae P. Hennings P. tiarellaecola Hiratsuka, f. and Endophyllum paederiae Stevens & Mendiola. In P. arenariae Winter and P. horiana P. Hennings, the observed mode of the metabasidium production was the same as that has previously been reported. However, the nuclear behavior in the life cycle was different from the previous reports.Among the nuclear behavior types observed in the species, the type found in Puccinia circaeae had not been known for the Uredinales. In this species, karyogamy took place in the teliospore and the subsequent first meiotic division occurred in the metabasidium upon germination of the teliospore. The two haploid nuclei were delimited by a septum and the metabasidium became two-celled. From each of the two cells, a uninucleate basidiospore was formed. The second meiotic division took place in the basidiospore, the spore becoming haploid binucleate.It has been suggested that homothallism often evolves during the life-cycle reduction in the rust fungi. There have been only a few experimental proofs for this possibility. In this study, Kuehneola japonica (Dietel) Dietel and P. lantanae were proven to be homothallic by a single basidiospore inoculation, where the mycelium derived from a single basidiospore produced the telium and the teliospore.

本研究主要关注与锈菌生活史缩短相关的后担子生产中的核行为。在这项研究中，核行为的类型相关的metabasidium生产新观察到的柄锈菌circaeaeaeaeae。，马缨丹G. Farlow，日本紫穗槐P.nipponica Dietel，败酱P.patriniae P.Hennings P.tiarellaecola平冢，f.和鸡矢藤内生叶菌（Endophyllum paederiae Stevens & Mendiola）。在沙田虫和堀叶虫中，观察到的后担子产生模式与以前报道的相同。然而，在生活史中的核行为与以往报道的不同，在所观察到的种的核行为类型中，在Puccinia circaeae中发现的类型在Uredinales中还没有发现。在该种中，核融合发生在冬孢子中，随后的第一次减数分裂发生在冬孢子萌发后的后担子中。两个单倍体细胞核由隔膜分隔，后担子变为两细胞型。从这两个细胞中的每一个，形成一个单核担孢子。担孢子发生第二次减数分裂，孢子变为单倍的双核。只有少数实验证明了这种可能性。本研究通过单担孢子接种证明了龟纹病菌和马缨丹疫霉是同宗配合的，即由单个担孢子产生的菌丝产生冬孢子和冬孢子。