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首页> 外文期刊>Science Advances >Pollen tube contents initiate ovule enlargement and enhance seed coat development without fertilization
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Pollen tube contents initiate ovule enlargement and enhance seed coat development without fertilization

机译：花粉管中的内容物可引起胚珠增大并促进种皮发育而不需施肥

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In angiosperms, pollen tubes carry two sperm cells toward the egg and central cells to complete double fertilization. In animals, not only sperm but also seminal plasma is required for proper fertilization. However, little is known regarding the function of pollen tube content (PTC), which is analogous to seminal plasma. We report that the PTC plays a vital role in the prefertilization state and causes an enlargement of ovules without fertilization. We termed this phenomenon as pollen tube–dependent ovule enlargement morphology and placed it between pollen tube guidance and double fertilization. Additionally, PTC increases endosperm nuclei without fertilization when combined with autonomous endosperm mutants. This finding could be applied in agriculture, particularly in enhancing seed formation without fertilization in important crops.
机译：在被子植物中，花粉管将两个精子细胞带向卵和中央细胞，以完成双重受精。在动物中，精子不仅需要精子，而且还需要精浆。但是，关于花粉管含量（PTC）的功能知之甚少，这类似于精浆。我们报告说，PTC在受精状态中起着至关重要的作用，并导致未受精的胚珠增大。我们称这种现象为花粉管依赖的胚珠增大形态，并将其置于花粉管引导和双重受精之间。此外，与自主胚乳突变体结合使用时，PTC可增加胚乳细胞核，而无需受精。这一发现可用于农业，特别是在重要作物不施肥的情况下增加种子的形成。

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