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Water mediates fertilization in a terrestrial flowering plant 

 
论文编号:
作者: Fan YL
刊物名称: New Phytologist
所属学科:
论文题目英文: Water mediates fertilization in a terrestrial flowering plant
年: Apr 2019
卷: online
期:
页:
联系作者: Li QJ
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影响因子: 7.433
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摘要:

Water-mediated fertilization is ubiquitous in early land plants. This ancestral mode of fertilization has, however, generally been considered to have been lost during the evolutionary history of terrestrial flowering plants.

We investigated reproductive mechanisms in the subtropical ginger Cautleya gracilis (Zingiberaceae), which has two pollen conditions: granular and filiform masses, depending on external conditions. We tested whether rain transformed granular pollen into filiform masses and whether this then promoted pollen-tube growth and fertilization of ovules. Using experimental manipulations in the field we investigated the contribution of water-mediated fertilization to seed production.

Rain caused granular pollen to form filiform masses of germinating pollen tubes which transported sperm to ovules resulting in fertilization and seed set. Flowers exposed to rain produced significantly more seeds than those protected from rain, which retained granular

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