Effects of environmental stresses on genetic diversity in microalgae

环境胁迫对微藻遗传多样性的影响

• 批准号: 10680529
• 负责人: KASAI Fumie
• 金额: $ 2.24万
• 依托单位: National Institute for Environmental Studies
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680529/
• 关键词: Closterium; Microalgae; Environmental stress; Genetic variation; Allozyme; マイクロサテライト

Genetic diversity of a population is considered as one of the factors which determine whether or not organisms could conquer anthropogenic environmental stresses.Maintenance of genetic variations in populations is affected by the source of variation and population size. In this study. I examined genetic variation in local populations of the conjugating green alga Closterium ehrenbergii isolated from paddy fields, where herbicides were assumed to be applied, and from other shallow water pools like ponds and lowland wetlands, where herbicides were not assumed to be applied. Allozyme variation was observed in the populations isolated from lowLand wetlands in Okinawa lsl. , whereas the variation was not observed in the populations isolated from paddy fields in Yaeyama lsls, where herbicides were assumed to be applied. These results suggest that an environmental stress like a herbicide could reduce genetic variation in microalgal populations.

种群的遗传多样性被认为是决定生物能否克服人为环境胁迫的因素之一，种群遗传变异的维持受变异来源和种群大小的影响。本研究我研究了遗传变异的共轭绿色的新月藻ehrenberthium从稻田中分离出来，其中除草剂被认为是适用的，并从其他浅水池，如池塘和低地湿地，其中除草剂不被认为是适用的当地人口。从冲绳lsl的低地湿地分离的群体中观察到等位酶变异。而从八重山县水稻田中分离的群体中未观察到这种变异。这些结果表明，除草剂等环境压力可以减少微藻种群的遗传变异。