Intrinsic and extrinsic factors acting on the reproductive process in alpine-snowbed plants: roles of phenology, biological interaction, and breeding system
Intrinsic and extrinsic factors acting on the reproductive process in alpine-snowbed plants: roles of phenology, biological interaction, and breeding system
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影响高山雪床植物繁殖过程的内在和外在因素：物候、生物相互作用和育种系统的作用
DOI：
10.1111/1442-1984.12070
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发表时间：
2015
影响因子：
1.4
通讯作者：
G. Kudo
中科院分区：
文献类型：
--
作者：
Y. Kameyama;G. Kudo
传粉媒介的活动和传粉媒介的竞争导致花粉对种子生产的定量和定性限制，并影响植物物种的繁殖成功，具体取决于其育种系统（例如，自交亲和性和异种相容性）和遗传负荷（例如，近交抑制和杂种不生存能力）。在高山生态系统中，融雪状况决定了植物群落的分布和物候。沿着融雪梯度广泛生长的植物物种通常与当地种群中的不同物种一起生长。它们的传粉者在季节中的数量、活动和行为也有所不同。这些变异可能会改变植物与传粉者以及植物与植物之间的相互作用。我们整合了对高山矮灌木Phyllodoce aleutica（杜鹃花科）的一系列研究，以阐明影响其繁殖过程的全套内在（物种特异性繁殖系统）和外在因素（雪况、传粉者活动和种间竞争）。传粉媒介活动的季节性导致早花种群的花粉数量受到限制，而在晚花种群中，高传粉媒介活动确保了授粉服务，但传粉媒介的种间竞争导致竞争性较弱的物种的花粉数量和质量受到限制。然而，当神秘的不亲和系统（即异型花粉粒优先于自花粉粒和异种花粉粒）可以有效防止胚珠和种子折扣时，非法花粉接收对种子成功率的负面影响可能会减少。我们的研究强调了植物繁殖的物种特异性反应对沿环境梯度改变传粉媒介可用性的重要性，以了解高山生态系统中授粉网络的一般特征。
Pollinator activity and competition for pollinators lead to quantitative and qualitative pollen limitations on seed production and affect the reproductive success of plant species, depending on their breeding system (e.g., self-compatibility and heterospecific compatibility) and genetic load (e.g., inbreeding depression and hybrid inviability). In alpine ecosystems, snowmelt regimes determine the distribution and phenology of plant communities. Plant species growing widely along a snowmelt gradient often grow with different species among local populations. Their pollinators also vary in their abundance, activity, and behavior during the season. These variations may modify plant–pollinator and plant–plant interactions. We integrated a series of our studies on the alpine dwarf shrub, Phyllodoce aleutica (Ericaceae), to elucidate the full set of intrinsic (species-specific breeding system) and extrinsic factors (snow condition, pollinator activity, and interspecific competition) acting on their reproductive process. Seasonality of pollinator activity led to quantitative pollen limitation in the early-blooming populations, whereas in the late-blooming populations, high pollinator activity ensured pollination service, but interspecific competition for pollinators led to qualitative and quantitative pollen limitation in less competitive species. However, negative effects of illegitimate pollen receipt on seed-set success might be reduced when cryptic incompatibility systems (i.e., outcross pollen grains took priority over self- and heterospecific pollen grains) could effectively prevent ovule and seed discounting. Our studies highlight the importance of species-specific responses of plant reproduction to changing pollinator availability along environmental gradients to understand the general features of pollination networks in alpine ecosystems.
影响因子：
5.5
作者：
M. Seifan;Eva‐Maria Hoch;S. Hanoteaux;K. Tielbörger
通讯作者：
M. Seifan;Eva‐Maria Hoch;S. Hanoteaux;K. Tielbörger