不定胚

在含单胚和多胚颖果中，胚均位于同一胚囊的珠孔端，未见到胚囊以外存在不定胚。

Authors ' materials showed that all the single , twin and triplet embryoes were situated at the micropylar end in one embryo sac of young ovule and no adventitious embryo was seen outside the embryo sac of ovules .

ABA对水稻愈伤组织、不定胚发育及其植株再生的影响

Effect of ABA on Rice Callus and Development of Somatic Embryo and Plant Regeneration

APⅣ珠心组织出现低频率异常生长的现象，但未观察到在自然条件下由珠心细胞发育形成的不定胚。

A low frequency of abnormal nucellar growth was observed in AP ⅳ, but no embryo developed from nucellus cell was found under natural condition .

其不定胚起源于胚珠内的珠心细胞。

Their origins were assured to be from nucellar cells in ovule .

几种柑桔类果树不定胚培养的研究

Studies on the culture of the adventitious embryos for some kinds of citrus trees

栽培的胡罗卜进行长期组织培养时，对不定胚发生的唯一要求是加进植物生长素。

For long-term tissue cultures of domestic carrot the only requirement for adventive embryogeny was addition of an auxin .

子叶柄的不定胚分化率为35.3%，顶芽为6.0%。

Differentiation rate of somatic embryo is 35.3 % in cotyledon petiole explant , and 6.0 % in terminal bud .

对双13、双3、陆52和阿里希斯尼四个多胚水稻品系，进行胚胎学的研究，发现其无融合生殖中存在不定胚这种类型，而这种不定胚起源于二倍体的珠心细胞。

The polyembryony of four rice strains were investigated . Adventitious embryos derived from nucellar cells as found to be an important type of apomixis .

目前以大田植株组织或器官为材料，植株再生研究较少，尚无诱导不定胚等的报道。

At present , used plant tissues or organs in field as the materials to study on plant regeneration is very less . There is no coverage on induced indefinite embryo .

从多胚水稻、雄性不育单性结实材料以及杂交后代中已发现了不定胚发生、胚和胚乳自发形成、高频率无融合生殖等不同类型的材料。

Some apomictic phenomenan , such as adventitious embryony , autonomous formation of embryo and endosperm , and high frequency of apomixis , have been found in polyembryonic rice , parthenogenesis of male sterile and crossing offspring .

不定胚起始细胞启动分裂时，胚囊发育至2核或4核时期，8核胚囊时期，胚珠内已形成多细胞不定胚结构。

Early when tile embryo sac was in 2-nucleate or 4-nucleate stage , initial cells of the adventitious embryos started division , and then developed into embryonic structures of multiple cells while the embryo sac was in 8-nucleate stage .

在菊花再生体系建立的过程中，利用显微镜和石蜡切片对叶片外植体的不同发育时期进行形态学与组织学的观察，以期观察不定胚发生的过程。

On the basis of establishing chrysanthemum regeneration system , morphological and histological observation were proceeded during the different development stages of leaf explants via microscopic observation and paraffin section , which was in order to reveal the process of the somatic embryo formation .

同时，不定根是胚后发生的器官，节位产生的大量不定根组成了水稻地下部的主要部分。

Adventitious root is a post-embryonic organogenesis event that is formed on the nodes and gives rise to most of the underground parts of rice .