Abe Tomoyuki, Tachiki Yuuya, Kon Hirokazu, Nagasaka Akiko, Onodera Kensuke, Minamino Kazuhiro, Han Qingmin, Satake Akiko
Hokkaido Research Organization, Forestry Research Institute, Higashiyama, Koshunai, Bibai, 079-0198, Japan.
Department of Biology, Faculty of Science, Kyushu University, Fukuoka, 819-0395, Japan.
Ecol Lett. 2016 Sep;19(9):1129-39. doi: 10.1111/ele.12651. Epub 2016 Jul 24.
Synchronised and fluctuating reproduction by plant populations, called masting, is widespread in diverse taxonomic groups. Here, we propose a new method to explore the proximate mechanism of masting by combining spatiotemporal flowering data, biochemical analysis of resource allocation and mathematical modelling. Flowering data of 170 trees over 13 years showed the emergence of clustering with trees in a given cluster mutually synchronised in reproduction, which was successfully explained by resource budget models. Analysis of resources invested in the development of reproductive organs showed that parametric values used in the model are significantly different between nitrogen and carbon. Using a fully parameterised model, we showed that the observed flowering pattern is explained only when the interplay between nitrogen dynamics and climatic cues was considered. This result indicates that our approach successfully identified resource type-specific roles on masting and that the method is suitable for a wide range of plant species.
植物种群同步且波动的繁殖现象，即大年结实，在不同分类群中广泛存在。在此，我们提出一种新方法，通过结合时空开花数据、资源分配的生化分析和数学建模来探究大年结实的近因机制。170棵树13年的开花数据显示出聚类现象的出现，即给定聚类中的树木在繁殖上相互同步，这一现象通过资源预算模型得到了成功解释。对投入到生殖器官发育的资源分析表明，模型中使用的参数值在氮和碳之间存在显著差异。使用一个完全参数化的模型，我们表明只有当考虑氮动态与气候线索之间的相互作用时，才能解释观察到的开花模式。这一结果表明，我们的方法成功地识别了资源类型对大年结实的特定作用，并且该方法适用于广泛的植物物种。
