STUDIES ON CAECOMYCES-COMMUNIS - MORPHOLOGY AND DEVELOPMENT

被引:13
作者
WUBAH, DA
FULLER, MS
AKIN, DE
机构
[1] USDA ARS,RICHARD B RUSSELL AGR RES CTR,ATHENS,GA 30613
[2] UNIV GEORGIA,DEPT BOT,ATHENS,GA 30602
关键词
CAECOMYCES; RUMEN FUNGI; MORPHOLOGY; MYCELIOID THALLUS; VEGETATIVE CELL;
D O I
10.2307/3759990
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The development of Caecomyces communis was studied with light and fluorescence microscopy. Caecomyces communis is a monocentric fungus which develops to form either a thallus consisting of one or more sporangia attached to a vegetative cell or a mycelioid thallus. During the formation of a vegetative cell with attached sporangia, the posteriorly uniflagellate zoospore encysts and produces a broad germ tube which develops into an incipient vegetative cell. The vegetative cell enlarges faster than the zoospore cyst which develops into an incipient sporangium. A unisporangiate thallus consists of one sporangium attached to a large, vacuolate, vegetable cell. Thallus development may terminate at this unisporangiate stage or further development into a multisporangiate thallus may occur. During multisporangiate thallus formation, the vegetative cell forms one or more outgrowths that become sporangial stalks. Nuclei occur within the vegetative cell and, at maturity, sporangia are formed at the tips of the outgrowths. Often, instead of forming sporangia at the tips of outgrowths produced by the vegetative cell, the outgrowths enlarge into thick filaments. These filaments branch extensively and nuclei occur within the branches. Sporangia are formed at the tips of such filaments which results in a mycelioid thallus. The development and morphology of C. communis and C. equi are compared.
引用
收藏
页码:303 / 310
页数:8
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