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汉语拼音：zǐ yè

种子植物胚的组成部分之一，是种子萌发时的营养器官。单子叶植物的胚只有一枚子叶，双子叶植物的胚有一对子叶，裸子植物的胚有两个或两个以上的子叶。

1. 种子植物胚的组成部分之一，是种子萌发时的营养器官。在被子植物中，单子叶植物的胚只有一枚子叶，双子叶植物的胚有一对子叶；裸子植物的胚有两枚或两枚以上的子叶。

• Dicotyledonous plants retain a series of strands.

  双子叶植物中保留着一系列的束.

• All trees except palms are dicotyledons.

  除了棕榈树,所有的树都是双子叶植物.

• The embryo consists of two large fleshy cotyledons.

  胚有两片大而肉质的子叶.

• The cotyledons of the mature embryo are either green, yellow or chalky yellow.

  成熟胚的子叶是绿色, 黄色或浅黄色.

• The dicotyledons diverged at an early stage of their evolution into two main groups.

  双子叶植物在演化的早期阶段就已分化为两大支派.

• The development of the soybean seedling is dependent on the food reserves stored in the cotyledons.

  大豆幼苗的发育依靠子叶中所贮存的养分.

• Cotyledons play an important part in the early stages of seedling development.

  子叶在种子发育的早期起到了重要的作用.

• These pests Xianchi rice leaves, and eat grains, rice straw.

  这些害虫先吃稻子叶, 又吃谷粒 、 稻秆.

• Fructification includes peel, seed coat, cotyledon and embryo 4 parts.

  果实包括果皮.种皮.子叶和胚四部分.

• There are three different tiers of initials in Diocots.

  在双子叶植物中有三层不同的原始细胞.

• Rape have established regeneration system of cotyledons, hypocotyls, protoplasts and microspore culture.

  油菜已经建立了子叶 、 胚轴 、 原生质体及小孢子培养的再生体系.

• Removal of cotyledons during germination could retard growth, but NOT stop growth.

  萌芽时去除子叶只会减慢生长, 而不会停止幼苗的生长.

• Two cotyledons have come out from the seedling.

  小苗长出了两片子叶.

• Its cotyledon node zone is telome elongation type.

  结果表明:向日葵幼苗的子叶节区类型为顶枝伸长型.

• Ginseng is a perennial dicotyledonous herbs Nightshade classes.

  人参果属茄科类多年生双子叶草本植物.