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首页> 外文期刊>Marine ecology >Modelling the relationship between sexual reproduction and rhizome growth in Posidonia oceanica (L.) Delile
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Modelling the relationship between sexual reproduction and rhizome growth in Posidonia oceanica (L.) Delile

机译：模拟海洋波塞冬草（L.）Delile中有性生殖与根茎生长之间的关系

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摘要

The relationship between flowering and growth performance of Posidonia oceanica (L.) Delile in meadows distributed along the south-eastern coast of Sicily (Italy) was investigated by means of a statistical model (generalized linear mixed model) combined with the lepidochronological analysis. Over a 28-year period, 67 floral stalk remains were observed. The highest flowering index was recorded in lepidochronological year 1998 (10.1%) and the Inflorescence Frequency per age showed a clear decrease corresponding to 15-year-old shoots. The sexual reproductive event had positive effects on rhizome elongation (cm year~(-1)) and leaf production (no. leaves year~(-1)) in the same flowering year, whilst no effect on the rhizome production (mg year~(-1)) was observed. Rhizome growth variables showed significant negative lagged responses in the two years following flowering. On the whole, we calculated that the effect exerted by flowering, in terms of loss on rhizome elongation and production, was about 27% and 38%, respectively. Although it has been demonstrated that recovery from the stress induced by sexual reproduction is limited to the two years after flowering, the magnitude of the reproductive cost may become quite considerable especially in comparison with the whole lifespan of individual shoots.
机译：通过统计模型（广义线性混合模型）并结合年代学分析方法，研究了西西里岛（意大利）东南沿海分布的草地波塞冬花（Posidonia oceanica（L.）Delile）的开花与生长性能之间的关系。在28年的时间里，观察到67个花茎残存。最高的开花指数记录在1998年的Lepidochronologic年（10.1％），并且每个年龄的花序频率显示出明显的下降，对应于15岁的新芽。有性生殖事件对同一开花年的根茎伸长（cm年〜（-1））和叶片产量（叶片年数〜（-1））产生积极影响，而对根茎产量（mg年〜 （-1））被观察到。开花后的两年中，根茎生长变量显示出显着的负滞后响应。总体而言，我们计算了开花损失对根茎伸长和产量的影响，分别约为27％和38％。尽管已经证明，从有性生殖引起的压力中恢复只能限于开花后的两年，但生殖成本的幅度可能变得相当可观，尤其是与单个芽的整个寿命相比。

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