博文
水位变化对水生植物金银莲花幼苗更新的影响
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水位变化对水生植物金银莲花幼苗更新的影响
摘要
为调查水位变化对金银莲花有性繁殖的影响，我们调查了其种子库特点、种子萌发和幼苗存活情况。种子库在整个池塘中都存在。种子库的寿命大于3年。一旦水位下降使得种子在泥滩上暴露种子就开始发芽。幼年期，幼苗生长要求暴露于空气中，当被水淹没时幼苗死亡。这说明幼苗建立在间或发生的水位下降或水体边缘，具体时间取决于水位变化的周期和模式。本研究表明了水体边缘暴露泥滩对金银莲花成功有性繁殖中种子发芽和早期幼苗生长的重要性。
The effect of water-level fluctuations on seedling recruitmentin an aquatic macrophyte Nymphoides indica(L.) Kuntze (Menyanthaceae)
Yuki Shibayama a, Yasuro Kadono b,*
a Division of Life Science, Graduate School of Science and Technology, Kobe University, Nada, Kobe 657-8501, Japan
b Department of Biology, Faculty of Science, Kobe University, Nada, Kobe 657-8501, Japan
Abstract
We examined seed bank characteristics and seed germination and the survival of seedlings to understand the significance of water-level fluctuations on sexual regeneration in Nymphoides indica (L.)Kuntze. The seed bank existed throughout the pond. The longevity of the seed bank was more than 3 years. Seed germination started on the exposed mudflat as soon as water drawdown occurred. At the juvenile stage, exposed conditions were required for seedling growth and the young seedlings died under submergence. It was suggested that seedling establishment was successful after occasional water drawdown or along the water margin according to the period and pattern of water-level fluctuation. This study indicated the significance of the exposed mudflat at the water edge for seed germination and the growth of juvenile plants to the success of sexual regeneration in N. indica.
Keywords: Nymphoides indica (L.) Kuntze; Seed germination; Seedling establishment; Soil seed bank; Water-level fluctuation; Conservation
https://blog.sciencenet.cn/blog-272085-401320.html
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