the macropyle serves as the entry point for the pollen tube in plant reproduction.
大孢子孔在植物繁殖中作为花粉管的进入点。
during ovule development, the macropyle forms a small opening at the anterior end.
在胚珠发育过程中，大孢子孔在前端形成一个小开口。
the pollen tube must penetrate the macropyle to reach the embryo sac.
花粉管必须穿透大孢子孔才能到达胚囊。
in gymnosperms, the macropyle is often larger than in angiosperms.
在裸子植物中，大孢子孔通常比被子植物大。
the structure of the macropyle varies among different plant species.
大孢子孔的结构因不同植物种类而异。
researchers study the macropyle to understand pollen tube guidance mechanisms.
研究人员研究大孢子孔以了解花粉管的引导机制。
the macropyle and micropyle are both essential structures in plant ovules.
大孢子孔和小孢子孔都是植物胚珠中的重要结构。
after pollination, the pollen tube grows toward the macropyle.
授粉后，花粉管向大孢子孔方向生长。
the location of the macropyle determines the direction of pollen tube growth.
大孢子孔的位置决定了花粉管的生长方向。
some seeds can be identified by the shape of their macropyle.
某些种子可以通过其大孢子孔的形状来识别。
the macropyle develops before the other parts of the ovule mature.
大孢子孔在胚珠其他部分成熟之前发育。
scientists observe the macropyle using advanced microscopy techniques.
科学家使用先进显微镜技术观察大孢子孔。
the macropyle serves as the entry point for the pollen tube in plant reproduction.
大孢子孔在植物繁殖中作为花粉管的进入点。
during ovule development, the macropyle forms a small opening at the anterior end.
在胚珠发育过程中，大孢子孔在前端形成一个小开口。
the pollen tube must penetrate the macropyle to reach the embryo sac.
花粉管必须穿透大孢子孔才能到达胚囊。
in gymnosperms, the macropyle is often larger than in angiosperms.
在裸子植物中，大孢子孔通常比被子植物大。
the structure of the macropyle varies among different plant species.
大孢子孔的结构因不同植物种类而异。
researchers study the macropyle to understand pollen tube guidance mechanisms.
研究人员研究大孢子孔以了解花粉管的引导机制。
the macropyle and micropyle are both essential structures in plant ovules.
大孢子孔和小孢子孔都是植物胚珠中的重要结构。
after pollination, the pollen tube grows toward the macropyle.
授粉后，花粉管向大孢子孔方向生长。
the location of the macropyle determines the direction of pollen tube growth.
大孢子孔的位置决定了花粉管的生长方向。
some seeds can be identified by the shape of their macropyle.
某些种子可以通过其大孢子孔的形状来识别。
the macropyle develops before the other parts of the ovule mature.
大孢子孔在胚珠其他部分成熟之前发育。
scientists observe the macropyle using advanced microscopy techniques.
科学家使用先进显微镜技术观察大孢子孔。
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