cotyledon petiole

Among cotyledon, petiole of cotyledon, hypocotyl, and radicle, hypocotyl has the most responsive explants to2,4-D.

在子叶、叶柄、胚轴以及胚根四者当中，下胚轴对2,4-D的反应状况最好。

The results showed that the cotyledon petiole and hypocotyls of 4~ 6 days seedlings had higher differentiation frequency of adventitious buds.

其结果是以4~6日龄的无菌苗的子叶柄、下胚轴上端外植体适于不定芽的较高频率分化；

Among cotyledon , petiole of cotyledon, hypocotyl, and radicle, hypocotyl has the most responsive explants to 2, 4-D .

在子叶 、 叶柄 、 胚轴以及胚根四者当中, 下胚轴对2, 4-D 的反应状况最好.

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

子叶柄的不定胚分化率为35.3%，顶芽为6.0%。

Morphologic characters of the seedlings from 20 species of Magnoliaceae were described, and some specimens were made and index which based on the morphologic characteristics such as length of cotyledon petiole, cotyledons folder in endosperm and leaf blade's fold mode in shoot was compiled.

描述了20种木兰科常用绿化植物幼苗，基于子叶柄的长度、子叶在胚乳中折叠方式和幼叶在芽中卷叠方式等特征，编制了分属检索表，并制作标本。

Multiple comparisons suggested that cotyledon with petiole or 1/ 4 piece of cotyledonary laminae from 7 days old aseptic seedling had much higher shoot regeneration frequency, reaching to over 90%.

多重比较结果表明，以7d苗龄无菌苗的带柄子叶或1/4子叶片为外植体较好，出芽率较高，达90%以上。

The effects of factors such as infection time of Agrobacterium, hormone proportions in pre-culture medium and differentiation medium on regeneration of Cotyledon petiole explants of Sichuan Yellow, Purple-leaf Mustard and their near-isogenic lines aseptic seedling were studied.

本研究以芥菜型油菜紫叶芥、四川黄籽及其近等基因系无菌苗的子叶柄为外植体，研究了农杆菌感染时间、预培养基和分化培养基中激素配比等对子叶柄再生的影响。

The experiment results indicated that cellulase activity in abscission zone from petiole of bean and cotyledon petiole of cotton was increased after treatment of GA_3, but it was inhibited by IAA.

这与GA3促进菜豆叶柄和棉苗子叶柄外植体的脱落、IAA延迟脱落的效应成正相关。