YEASTS ASSOCIATED WITH DROSOPHILA IN TROPICAL FORESTS OF RIO-DE-JANEIRO, BRAZIL

被引:45
作者
MORAIS, PB
HAGLER, AN [1 ]
ROSA, CA
MENDONCAHAGLER, LC
KLACZKO, LB
机构
[1] UNIV FED RIO DE JANEIRO,INST MICROBIOL,CCS,BL I,ILHA FUNDAO,BR-21941 RIO JANEIRO,BRAZIL
[2] UNIV FED RIO DE JANEIRO,INST BIOL,BR-21941 RIO JANEIRO,BRAZIL
关键词
YEAST COMMUNITIES; DROSOPHILA; RAIN FOREST; TROPICAL CLIMATE;
D O I
10.1139/m92-188
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The distribution and diversity of yeast species vectored by and from the crop of eight species groups of Drosophila is described for two rain forest sites and an urban wooded area in Rio de Janeiro, Brazil. The typical forest Drosophila groups guarani, tripunctata, and willistoni showed a higher diversity of yeasts than the cosmopolitan melanogaster species group, suggesting different strategies of utilization of substrates. Apiculate yeasts, including Kloeckera apis, Kloeckera javanica, and Kloeckera japonica, were the prevalent species. Geotrichum spp. and Candida citrea were also frequent isolates in the forest sites. Similarities between the yeasts from the external surfaces and crops of Drosophila suggested that the feeding substrates were the main source of the yeasts vectored by these flies. Most of the yeasts were strong fermenters and assimilated few compounds, usually sucrose, cellobiose, and glycerol. This indicated a preference of the flies for food sources such as fruits. Some yeasts were primarily isolated from one group of Drosophila; for example, Kloeckera javanica from the melanogaster group, Debaryomyces vanrijiae var. yarrowii from the tripunctata group, and Kluyveromyces delphensis from the willistoni group. These associations and differences in the yeast communities among the fly groups suggested a differentiation of diets and specialization of the yeast-Drosophila association in the tropical forests.
引用
收藏
页码:1150 / 1155
页数:6
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