在Caenorhabditis elegans中跨环境的雌雄性精子生产的发育可塑性
Clotilde Gimond1, Nausicaa Poullet1,2, Anne Vielle1
1Université Côte d'Azur, CNRS, Inserm, IBV, Nice, France.
PloS one
|November 7, 2025
概括
凯诺拉布狄氏菌的雌雄性体表现出塑性精子生产,但自我受精通常受到卵细胞的限制,而不是精子. 环境因素比精子数量更多地影响发育.
科学领域:
- 进化生物学 进化生物学
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
背景情况:
- 有机体调整资源分配以在不同环境中进行繁殖.
- 雌雄性动物面临复杂的性别分配决策,平衡卵细胞和精子的生产.
- 凯诺拉布狄氏素 elegans 两性化动物连续产生精子,然后是卵子,使精子生产对自我受精至关重要.
研究的目的:
- 为了研究C. elegans hermaphrodites的自我精子生产的环境可塑性.
- 为了确定精子生产是否被调整以优化各种条件下的自我受精.
- 为了比较精子生产与其他生殖特征的环境敏感性.
主要方法:
- 在多种不同的实验环境中直接量化雌雄性自我精子生产.
- 评估受精的开始,自我后代数,发育时间和生殖线的扩散.
- 通过不同基因背景 (N2实验室菌株与野生菌株) 的生殖可塑性的比较.
主要成果:
- 精子生产表现出发育可塑性,但这并没有持续增加自我后代,这表明卵细胞受限.
- 增加的精子生产并没有延迟整个环境的受精开始.
- 轻微的饮食限制影响了发育时间和生殖线的增殖,但没有影响精子的生产.
- 精子和生殖系特征的可塑性在实验室和野生C. elegans菌株之间有显著的差异.
结论:
- 与其他繁殖特征相比,C. elegans中的雌雄性精子生产对环境变化相对不敏感.
- 自我受精的成功更可能受到卵细胞的可用性而不是精子数量的限制.
- 遗传背景在C. elegans的生殖特征的可塑性中起着至关重要的作用.
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