Brysch-Herzberg Michael
Department of Biology, Philipps-University Marburg, 35043 Marburg, Germany.
FEMS Microbiol Ecol. 2004 Nov 1;50(2):87-100. doi: 10.1016/j.femsec.2004.06.003.
Yeast community involved in plant-bumblebee mutualism was investigated in three successive years. Yeasts were isolated from floral nectar, bumblebee queens after hibernation, bumblebee workers, and the honey provisions in nests. From the distribution of yeast species in the various microhabitats in the course of the year their ecology was assessed. Nectar of numerous plant species belonging to various plant families was analyzed in order to uncover possible impacts on the yeasts present in the nectar. Only ascomycetous yeasts were autochthonous members of the communities in the plant-bumblebee mutualism. Species in the Metschnikowia clade, the Starmarella clade, and the genera Debaryomyces and Zygosaccharomyces were associated with the mutualism. Some species appeared highly specialized, whereas others had a broader distribution. While physical and chemical properties of nectar had only limited influence on the abundance of nectar yeasts, the attractiveness of plants to the flower-visiting insects appears to have had a greater impact on the abundance and frequency of yeasts in the nectar of different plant species.
连续三年对参与植物 - 熊蜂互利共生关系的酵母群落进行了调查。从花蜜、冬眠后的熊蜂蜂王、熊蜂工蜂以及蜂巢中的蜂蜜储备中分离出酵母。根据一年中不同微生境中酵母种类的分布情况对其生态进行了评估。为了揭示对花蜜中存在的酵母可能产生的影响，对属于不同植物科的众多植物物种的花蜜进行了分析。在植物 - 熊蜂互利共生关系中，只有子囊菌酵母是群落的本地成员。梅奇尼科夫酵母属分支、星马勒酵母属分支以及德巴利酵母属和接合酵母属的物种与这种互利共生关系有关。一些物种表现出高度的专一性，而其他物种分布更广。虽然花蜜的物理和化学性质对花蜜酵母的丰度影响有限，但植物对访花昆虫的吸引力似乎对不同植物物种花蜜中酵母的丰度和频率有更大影响。
