Evolutionary Ecology of Marine Yeasts as Determined by Molecular Relatedness

人们对妇女的作用认识不足， 海洋微生物是地球化学循环和其他 流程. 这部分是由于以下方面的信息不足： 这些海洋生物的基本生物学。 最近 分子生物学的进步已经提供了工具来回答 各种各样的基本问题。 本研究将探讨 海洋酵母的起源和系统发育关系。 初步调查表明，海洋酵母起源于 从陆生植物寄生虫，异杆菌， 包括锈菌和黑穗病菌等真菌的一组。 最近 研究表明异担子菌能够 生产自由生活酵母阶段，可以通过 翼或地面排水。 我们的研究，基于表型 这些特征表明，许多海洋酵母是 从植物的酵母阶段进化而来或与植物的酵母阶段相同 寄生虫 然而，基于细胞核DNA的分子研究 相关性，表明基于表型的比较 答案可能是误导性的，因为许多人的遗传基础 这些标准只存在于少数几个基因中。 我们建议 确定海洋酵母物种之间的关系， 酵母与陆生植物寄生虫的关系 通过分子关联性的研究。

There is a considerable lack of knowledge of the role of marine microorganisms is biogeochemical cycling and other processes. This is due, in part, to inadequate information on the fundamental biology of these marine organisms. Recent advances in molecular biology have made tools available to answer a variety of basic questions. This research will examine the origin and phylogenetic relationships among marine yeasts. Preliminary investigations indicate that marine yeasts originated from terrestrial plant parasites, the heterobacidiomycetes, a group that includes such fungi as the rusts and smuts. Recent studies have shown that the heterobasidiomycetes are capable of producing free living yeasts stages that may be distributed by wing or land drainage. Our studies, based on phenotypic characteristics, suggests that many of the marine yeasts are evolved from, or are identical to, the yeasts stages of the plant parasites. However, molecular studies, based on nuclear DNA relatedness, have shown that comparisons based on phenotypic responses can be misleading because the genetic bases for many of thes criteria reside in only a few genes. We propose to determine the relationships between species of marine yeasts and the relationships of yeasts to terrestrial plant parasites through studies of molecular relatedness.