子叶和种子叶附着在胚轴上。
The cotyledons and the seed leaves are attached to the embryonic axis.
大部分热带树种的实生苗为子叶出土。
本研究还证明了禾本科植物的浆片和双子叶植物中花瓣是同源器官的观点。
Our findings corroborate the view that the lodicules of grasses are homologous to eudicot petals.
根据分子数据结合形态上近裔共性，若干分支的单系性得到支持，这些分支包括真双子叶植物、蔷薇分支和菊分支等。
Several monophyletic clades of seed plants, namely eudicots, rosids, and asterids, were supported by molecular data with their united morphological synapomorphies.
它是由大孢子叶两边融合而来的。
It has evolved by fusion of the two edges of the megasporophyll.
双子叶植物中保留着一系列的束。
成熟胚的子叶是绿色，黄色或浅黄色。
The cotyledons of the mature embryo are either green, yellow or chalky yellow.
开始时，植物幼体从子叶获得养料。
In the beginning, the baby plant will get its food from the seed leaves.
西印度羽状叶棕榈的一个单子叶植物属。
胚有两片大而肉质的子叶。
细脉的网状式样是双子叶植物的主要特征。
The reticulate pattern of minor veins is characteristic of most dicotyledonous plants.
通过器官发生途径，由大豆子叶节诱导丛生芽。
Multiple shoots were induced on cotyledon nodes of soybean by means of organogenesis.
其发育过程类似于单子叶植物合子胚的发育过程。
This kind of development was similar to that of the zygotic embryo in monocotyl.
双子叶植物在演化的早期阶段就已分化为两大支派。
The dicotyledons diverged at an early stage of their evolution into two main groups.
子叶的变异是遗传原因还是生理影响尚需进一步研究。
Whether the variations in cotyledons are caused by physiological or genetic factors must await more research.
酯酶同工酶则以子叶分化期胚为最多，成熟胚为最少。
The esterase isoenzyme bands were the most in cotyledon differentiatingembryoid, but the least in mature embryoid.
一次加倍发生在2亿年前，即单子叶和双子叶植物出现之前。
One duplication occurred 200 million years ago, just before monocots and eudicots arose.
被子植物中单子叶植物475种，双子叶植物567种。
In angiosperms there are 475 species of monocotyledon and 567 species of dicotyledon.
夏大豆绿色豆荚的光合速率很低，而子叶的光合速率却较高。
The NPR of green pods was very small, and that of cotyledon higher.
双子叶植物典型的营养叶由两个主要部分组成：叶片和叶柄。
A typical foliage leaf of a plant belonging to the dicotyledons is composed of two principal parts: blade and petiole.
水稻不仅是重要的粮食作物，还是单子叶植物中的模式植物。
Rice is not only the main food crop, but also the model plant of monocotyledonous investigation.
采用直观的烟雾显示技术成功地捕捉转子叶顶间隙泄漏流动图像。
The top blade clearance flow image of rotor was taken by intuitionistic smoke display technology successfully.
建立了以薄皮甜瓜品种‘弥河银瓜’子叶为外植体的高效再生体系。
A efficient regeneration system of plantlets was established with cotyledon as explants in melon Cucumis melo l.
该研究对压气机静子叶片锻造工艺的优化设计具有重要的指导意义。
This study is of significance to the technological design in the compressor stator blade forging process.
同转子尾迹相比，转子叶尖泄漏涡对静子尖区的影响更为明显和深远。
The rotor tip leakage vortex has a stronger influence on the downstream endwall flow than the rotor wake.
结论：榛子叶多酚可提高皮肤中胶原蛋白含量，具有延缓皮肤衰老作用。
Conclusion: Heterophylla leaf tannin help mice to raise the contents of collagen in skin and to resist skins senility.
休斯顿火箭队中锋姚明的妻子叶莉怀孕的消息已经在国内外都引起了极大关注。
News that Ye Li, wife of Houston Rockets center Yao Ming, is pregnant obviously has attracted great attention at home and abroad.
伸向子叶的子叶迹，直接由原生木质部极外面的一群薄壁组织细胞分化形成。
The extending cotyledon traces differentiate directly from the parenchymatous cells which locate on the outside of the poles of primary xylem.
在子叶节区下部存在子叶节区—根过渡区；子叶节区上部存在子叶节区—茎连接区。
The lower part of its cotyledon node zone is cotyledon node zone-root transition region, and its upper part is cotyledon node zone-stem connection region.
胚性细胞分裂产生两个细胞，进而分化发育成多细胞原胚、球形胚、心形胚及子叶胚。
Then embryogenic cell divided into two cells, which sequentially differentiated through multicell proembryo, globular, heart-shaped and cotyledonary embryo stages.
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