Do floral traits and the selfing capacity of Mimulus guttatus plastically respond to experimental temperature changes?

Do floral traits and the selfing capacity of Mimulus guttatus plastically respond to experimental temperature changes?
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含酸浆的花性状和自交能力对实验温度变化有塑性反应吗?

DOI:
10.1007/s00442-019-04558-y
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发表时间:
2020
期刊:
影响因子:
2.7
通讯作者:
van Kleunen M.
van Kleunen M.
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Razanajatovo M;Fischer L. ;van Kleunen M.

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气候变化会对植物与传粉者的相互作用产生负面影响,并减少异花授粉。为了保证繁殖,提高自主自交的能力应有利于植物在新的温度条件下的持久性。塑料的自主自交能力对气候变化的反应可能会间接地发生,由于与这种能力相关的花性状的变化。我们测试了混合交配植物Mimulus guttatusis是否能够塑性变化的花性状,有利于自主自交,以响应温度变化。在七个生长室中,我们生长。guttatusoriginated从大范围的纬度(从37.89° N到49.95° N),从而在北美的家庭温度,并通过实验评估(自主)自交和异交能力的植物。随着白天和夜间实验测试温度与室内温度的差值的增加,花的长度和宽度减小。花大小的可塑性反应表明植物在自主自交中可能更成功。然而,我们没有发现直接证据表明M。guttatus通过增加自主自交能力对温度升高作出反应。随着温度差异的增加,种子生产的几率,种子数量和单个种子质量下降。我们的研究结果表明,全球变暖和相关的极端温度事件的增加可能是有害的繁殖,从而持久的一些植物。
Climate change can negatively impact plant–pollinator interactions, and reduce outcross pollination. For reproductive assurance, an increased capacity for autonomous selfing should benefit the persistence of plants under new temperature conditions. Plastic responses of the autonomous selfing capacity to climate change may occur indirectly due to changes in floral traits associated with this capacity. We tested whether the mixed mating plantMimulus guttatusis capable of plastic changes in floral traits favoring autonomous selfing in response to temperature changes. In seven growth chambers, we grewM. guttatusoriginating from a large range of latitudes (from 37.89° N to 49.95° N) and thus home temperatures in North America, and experimentally assessed the (autonomous) selfing and outcrossing capacities of the plants. With an increase in the difference between the overall mean daytime and nighttime experimental test temperature and home temperature, flower length and width decreased. The plastic response in flower size suggests that plants may be more successful at autonomous selfing. However, we did not find direct evidence thatM. guttatusresponded to increased temperature by an increased autonomous selfing capacity. With an increase in temperature difference, the odds of seed production, number of seeds, and individual seed mass decreased. Our results indicate that global warming and the associated increase in extreme temperature events may be detrimental to the reproduction and thus persistence of some plants.
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