以下为句子列表：
英文: ECMs associated with pollen tube growth include arabinogalactan proteins, extensin-like glycoproteins, proline-rich proteins, calmodulin, S-glycoproteins, pectins and those that specifically located in the ovary.
中文: 与花粉萌发和花粉管生长相关的雌蕊胞外基质种类主要包括阿拉伯半乳糖蛋白、类伸展素糖蛋白、富含脯氨酸糖蛋白、钙调素、S-糖蛋白、果胶以及子房的特异性物质等。
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英文: Generative nuclei The two gametic nuclei formed by the division of the generative cell in the pollen tube of angiosperms.
中文: 雄原核：在被子植物花粉管中的生殖细胞（应为雄原核译者注）分裂成两个配子的核。
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英文: In seed plants it is the generative cell in the pollen grain, which divides in the pollen tube to produce two sperm cells.
中文: 在种子植物中，它是在花粉粒中的生殖细胞，可以在花粉管内分裂形成两个精子。
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英文: The endosperm is usually triploid and develops from the primary endosperm nucleus, the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac.
中文: 胚乳通常是三倍体，由初生胚乳核发育而来，三倍体核来源于花粉管中的雄配子与胚囊中两个极核的融合。
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英文: Random deposition of callose along pollen tube wall and even the whole wall was observed.
中文: 花粉管中胼胝质沿管壁不规则沉积， 有的不形成胼胝质塞，或整个管壁被胼胝质所覆盖。
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