Changes in phenology can alter patterns of natural selection: the joint evolution of germination time and postgermination traits
Changes in phenology can alter patterns of natural selection: the joint evolution of germination time and postgermination traits
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DOI：
10.1111/nph.18711
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发表时间：
2023-01-22
期刊：
影响因子：
9.4
通讯作者：
Donohue, Kathleen
中科院分区：
文献类型：
--
作者：
D'Aguillo, Michelle;Donohue, Kathleen
发育转变的时间（物候学）可以影响随后的生命阶段所经历的环境。当物候学导致一个生物体占据一个特定的栖息地作为一个结果的发展线索使用，它可以作为一种形式的栖息地跟踪。进化理论预测，栖息地跟踪可以改变强度，方向和模式的自然选择，随后表示traits.center点为了测试是否发芽物候改变自然选择的发芽后性状，我们操纵发芽时间种植幼苗在7个发芽队列跨越2年。我们测量了选择发芽后性状相关的干旱，冷冻，耐热性使用不同组合的拟南芥突变体和自然发生的ecotypes.center.发芽队列经历变量选择：当干燥，寒冷，炎热的环境中经历的幼苗，选择分别加强干旱，冷冻，耐热性。反过来，postgermination性状修改的最佳发芽时间，基因型发芽后，在环境中，符合他们的生理tolerances.center点我们的研究结果支持理论预测的栖息地跟踪和性状之间的反馈栖息地选择后表示的最大健身。在自然种群中，物候变化是否会改变对随后表达的性状的选择，将取决于通过物候进行栖息地跟踪的有效性。
center dot The timing of a developmental transition (phenology) can influence the environment experienced by subsequent life stages. When phenology causes an organism to occupy a particular habitat as a consequence of the developmental cues used, it can act as a form of habitat tracking. Evolutionary theory predicts that habitat tracking can alter the strength, direction, and mode of natural selection on subsequently expressed traits.center dot To test whether germination phenology altered natural selection on postgermination traits, we manipulated germination time by planting seedlings in seven germination cohorts spanning 2 yr. We measured selection on postgermination traits relating to drought, freezing, and heat tolerance using a diverse combination of Arabidopsis thaliana mutants and naturally occurring ecotypes.center dot Germination cohorts experienced variable selection: when dry, cold, and hot environments were experienced by seedlings, selection was intensified for drought, freezing, and heat tolerance, respectively. Reciprocally, postgermination traits modified the optimal germination time; genotypes had maximum fitness after germinating in environments that matched their physiological tolerances.center dot Our results support the theoretical predictions of feedbacks between habitat tracking and traits expressed after habitat selection. In natural populations, whether phenological shifts alter selection on subsequently expressed traits will depend on the effectiveness of habitat tracking through phenology.