- 更多网络例句与双胚珠的相关的网络例句 [注：此内容来源于网络，仅供参考]
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Embryological observations on Crawfurdia delavayi, Tripterospermum cordatum, T. chinense, Gentiana striata and Pterygocalyx yolubilis show that the group under study is greatly diverse in differentiation and development of anther wall, type of ovule and placentae, synergid and antipodal cell in embryo sac, testa and embryogeny etc. The embryological characters are different among Crawfurdia, Tripterospermum and Gentiana Sect.
胚胎学 本文对披针叶蔓龙胆C.delavayi、双蝴蝶T.chinense、峨眉双蝴蝶T.cordatum、条纹龙胆G.striata和翼萼蔓P.voiubilis作了较详细的胚胎学研究，这些类群在花药壁的分化和形成、胚珠和胎座类型、卵器中的助细胞和反足细胞、种皮以及胚发育等特征上存在差异，并且在胚胎学特征上各自拥有原始和进化的性状。
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In the late of April of the second year, male inflorescences unbound and pollinated. When female inflorescences accepted the pollen grains, ovary development was increased in early May. With the development of either of the two ovule, funiculus, integument and nucellus were differentiated. Embryo sac mother cell came into being and the meiosis begins. Then fuctional megaspore developed into matured embryo sac that contain eight nucleuses. In the end of May, double fertilization generated.
次年，4月下旬，雄花序解螺旋散粉，雌花序开花授粉；5月上旬，雌花序授粉后，迅速增长，子房膨大，两个胚珠分化出珠柄、珠被和珠心，珠心中产生孢原细胞；5月中下旬，大孢子母细胞形成并减数分裂，功能性大孢子形成成熟的八核胚囊；5月底，发生双受精。
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Although the megagametophyte formed and even the double fertilization had been finished 70 days after pollination at normal temperature, the megasporogenesis had not yet been finished at low temperature.
低温(12-18℃)处理的蝴蝶兰，授粉50d开始分化胚珠原基、60 d胚囊处于大孢子母细胞时期，比常温(20-25℃)下的推迟10-15 d；授粉70 d，常温下的蝴蝶兰植株已完成雌配子体发育和双受精，而低温处理的蝴蝶兰仍未完成大孢子的发生过程。
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Female flowers: tepals 5 or 6 or several; carpels 2 or 3; ovary superior, 2- or 3-locular; styles 2 or 3, free, persistent; stigma broadly recurved; interstylar nectaries present or lacking; ovules 2 per locule, pendent, anatropous, bitegmic, crassinucellar; micropyle formed by inner integument or by both integuments.
雌花 花被片5或者6或者几个；心皮2或3；子房上位，室2或3；花柱2-3，离生，宿存；宽的柱头下弯；花柱间的蜜腺有或者无；胚珠每室2，下垂，倒生，具双珠被，具厚珠心；珠孔由内珠被或者两层珠被形成。
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Double fertilization The fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus.
双受精：指花粉粒中的一个精子与胚珠中的卵细胞结合形成受精卵，另一个精核与极核结合形成三倍体的胚乳核。
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Could be observed on 10th day after pollination, archesporial cell on 20thday, megasporocyte on 24th day, the functional megaspore on 30th day; and 8-nucleate embryo sac on 41th day. And then double fertilization finish and early globular embryo emerg.
授粉10 d出现指状突起，20 d形成胚珠原基，24 d大孢子母细胞发生，30 d功能大孢子形成，41 d发育为成熟的八核胚囊，而后完成双受精发育成早期球形胚。
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Thpetum is the gland cell type. The pistil has two carpels, the ovules belong to straight ovules with bitegmic;77% nucellus stoped development before from the archesporial cell and disappear and 23% nucellus atrophy .so the flower cannot grow seeds.
安祖花的雌蕊是由2 心皮组成，胚珠为直生胚珠，双珠被，77%珠心细胞在胞原细胞形成之前停止发育，并且逐渐解体消失，23%珠心细胞发生萎缩，导致雌蕊败育。
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The investigation of the structures of reproductive organs,megasporogenesis,microsporogenesis and the development of male and female gametophyte in Dendrocalamus sinicus are made using normal paraffin method in this article.
通过石蜡切片的方法对巨龙竹生殖器官结构、大小孢子的发生和雌、雄配子体的发育过程进行了观察研究。巨龙竹为一心皮组成的单室单子房，子房内具有一个胚珠，倒生、双珠被、厚珠心。
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Female flowers: tepals 5 or 6; carpels 3; ovary 3-locular; styles 3, free; stigma often decurrent; interstylar nectaries or nectariferous tissue present; ovules 2 per locule, pendent, anatropous, bitegmic, crassinucellar; micropyle formed by inner integument, rudimentary aril.
雌花 花被片5或者6；心皮3；子房3室；花柱3，离生；柱头经常下延；内花柱蜜腺或分泌蜜汁的组织宿存；胚珠每室2，下垂，倒生，具双珠被，具厚珠心；珠孔形成于内珠被，假种皮不发育。
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The vascular bundle of stem is the type of double phloem. The anther is tetrasporangiate. Simultaneous cytokinesis in the microspore mother cell follows meriosis.
茎的维管束是双韧类型；雄蕊的花药四室，小孢子的形成为同时型胞质分裂，悬垂胎座，倒生胚珠，核型胚乳，果实成熟时胚仍处于球形胚阶段。
- 更多网络解释与双胚珠的相关的网络解释 [注：此内容来源于网络，仅供参考]
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diosmosis：渗透
diosmose 渗透现象 | diosmosis 渗透 | diovular 双胚珠的
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embryo：胚
简介:第八章 种子和果实 第一节 种子 一、种子的发育 ( 一 ) 胚 (embryo) 的发育 合子胚 初生胚乳核 胚乳 珠被 种皮 1. 双子叶植物胚的发育 合子经过短暂的休眠期, 顶细胞和基 细胞 . 基细胞发
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Archichlamydeae：原始花被亚纲
被子植物分为两个纲,即双子叶植物纲(Dicotyledoneae)和单子叶植物纲(Monocotyledoneae),它们的基本区别如下(表11-2):原始花被亚纲(Archichlamydeae)又称离瓣花亚纲.包括无被花,单被花,或虽为重被花,但花瓣常分离.雄蕊和花冠离生.胚珠一般有一层珠被.
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diovular：双胚珠的
diosmosis 渗透 | diovular 双胚珠的 | dioxane 二氧杂环乙烷
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diovular：双胚珠的; 双卵性的 (形)
diorama 透视画; 西洋景; 立体模型 (名) | diovular 双胚珠的; 双卵性的 (形) | dioxane 二氧杂环乙烷 (名)
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Juglandales：胡桃目
分目 胡桃目(Juglandales) 双子叶植物纲(木兰纲) 乔木,常有树脂. 羽状复叶,互生,常无托叶. 花单性同株. 单花被,雄蕊3--∞,子房下位,1室或不完全的2--4室,胚珠1个直立,无胚乳. 分科 本目包含马尾树科和胡桃科.
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Violales：堇菜目
简介 堇菜目(Violales) 双子叶植物纲(木兰纲) 木本或草本. 叶互生或对生;托叶常存在. 花常两性,整齐,双被花,5基数;雄蕊与花瓣同数或较多;雌蕊由3个(偶5)心皮组成的侧膜胎座;子房上位,胚珠多数...