植物生长调节物质对一品红组织培养中器官分化的效应

以一品红 (Euphorbia pulcherrima willd)幼茎诱导出的愈伤组织为外植体 ,以 MS为基本培养基 ,设计不同浓度的 ZT,6-BA,NAA,IBA,IAA,2 ,4-D等单因子和不同比值的细胞分裂素和生长素组合实验 ,探讨不同植物生长调节物质及其组合对一品红器官 (芽、根 )分化的效应结果表明 ,在根的诱导分化时 ,单因子 MS+NAA0 .5 mg·L- 1配方最为有利 ,诱导率为 45 .6% ;组合因子配方中 MS+IBA0 .2 +NAA 0 .1 mg· L- 1 最好 ,诱导率为 89.0 % .在芽的诱导分化时 ,单因子配方 MS+ZT0 .5 mg· L- 1最高 ,组合因子配方中以 MS+ZT1 .0 mg·L- 1 +NAA0 .1 mg·L- 1最有利 ,诱导率分别为 5 2 .1 % ,95 .3 % .

兰靛果芽特性与花芽分化的研究

用石蜡切片法对兰靛果芽的特性及花芽分化特点进行研究。结果表明 ,兰靛果枝条的每个叶腋中具有 3个芽 ,为单列迭生芽 ,3个芽的形态结构、大小及生理活动状态具一定差异 ,一般下芽为活动芽 ,属于混合芽类型。花芽形态分化前后 ,各种糖类和可溶性蛋白质有规律变化 ;形态分化过程可分为分化初期、花序原基分化期和小花形成期。

银边落地生根不同组织和器官的离体培养(简报)

改变激素配比,可从叶片边缘齿间凹处直接诱导出芽丛。去掉表皮的叶肉组织可经愈伤组织途径分化成芽和根。单层离体叶片表皮不能成活。幼茎的上端节间易分化成根,而下端节间则易分化成芽。

山茶和毛叶茶的花器官形态发生

用扫描电子显微镜观察了山茶和毛叶茶的花器官形态发生,从花器官形态发生角度探讨山茶亚属和茶亚属的关系,结果表明山茶亚属比茶亚属原始。

二维自仿射变换的图形生成——植物分形及其收敛性研究

讨论一类显示植物分形结构的仿射变换，提出研究植物形态学的计算机模拟方法，同时考虑了生成图形的分形维度的算法。

Foliar modifications induced by inhibition of polar transport of auxin

The effects of auxin polar transport inhibitors, 9-hydroxy-fluorene-9-carboxylic acid (HFCA); 2, 3, 5-triiodobenzoic acid (TIBA) and trans-cinnamic acid (CA)on leaf pattern formation were investigated with shoots formed from cultured leaf explants of tobacco and cultured pedicel explants of Orychophragmus violaceus, and the seedlings of tobacco and Brassica chinensis. Although the effective concentration varies with the inhibitors used, all of the inhibitors induced the formation of trumpet-shaped and/or fused leaves. The frequency of trumpet-shaped leaf formation was related to the concentration of inhibitors in the medium.Histological observation of tobacco seedlings showed that there was only one main vascular bundle and several minor vascular bundles in normal leaves of the control, but there were several vascular bundles of more or less the same size in the trumpet-shaped leaves of treated ones.These results indicated that auxin polar transport played an important role on bilateral symmetry of leaf growth.