Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC 27710.
Mol Biol Cell. 2018 Dec 15;29(26):3119-3127. doi: 10.1091/mbc.E18-08-0528. Epub 2018 Oct 24.
Studies of laboratory strains of have uncovered signaling pathways involved in mating, including information-processing strategies to optimize decisions to mate or to bud. However, lab strains are heterothallic (unable to self-mate), while wild yeast are homothallic. And while mating of lab strains is studied using cycling haploid cells, mating of wild yeast is thought to involve germinating spores. Thus, it was unclear whether lab strategies would be appropriate in the wild. Here, we have investigated the behavior of several yeast strains derived from wild isolates. Following germination, these strains displayed large differences in their propensity to mate or to enter the cell cycle. The variable interest in sex following germination was correlated with differences in pheromone production, which were due to both - and -acting factors. Our findings suggest that yeast spores germinating in the wild may often enter the cell cycle and form microcolonies before engaging in mating.
对实验室菌株的研究揭示了参与交配的信号通路,包括优化交配或出芽决策的信息处理策略。然而,实验室菌株是异核的(不能自我交配),而野生酵母是同核的。虽然使用循环单倍体细胞研究了实验室菌株的交配,但据认为野生酵母的交配涉及萌发的孢子。因此,实验室的策略是否适用于野生环境尚不清楚。在这里,我们研究了来自野生分离株的几种酵母菌株的行为。在萌发后,这些菌株在交配或进入细胞周期的倾向方面表现出很大的差异。萌发后对性的不同兴趣与信息素产生的差异有关,而这些差异是由 - 和 - 作用因子引起的。我们的发现表明,在野外萌发的酵母孢子可能经常在参与交配之前进入细胞周期并形成微菌落。