摘要
采用石蜡制片法对四合木茎插穗不定根的形成进行了解剖学研究,探讨四合木生根类型、生根部位、愈伤组织与生根的关系以及不定根的形成过程。结果显示:(1)四合木具有典型的木本植物茎结构,茎皮层内未发现厚壁组织。(2)四合木茎薄壁组织含有丰富的淀粉粒和蛋白质。(3)四合木茎插穗内无潜伏根原基,不定根由诱生根原基发育形成,诱生根原基是由愈伤组织自身的薄壁细胞反分化形成。研究表明,愈伤组织是孕育不定根的前提,四合木扦插生根属于愈伤组织生根类型。
We conducted an anatomical study on the formation of adventitious roots of Tetraena mongolica stem cuttings by paraffin section method to investigate the rooting type, rooting position, and the relation- ship between rooting and callus generation, and the formation of adventitious roots. The results showed that. （1）T. mongolica has typical stem structure of woody plants and sclerenchyma was not found in the stem cortex. （2）Stem parenchyma tissues contained abundant starch grains and proteins. （3）There were no latent root primordia in stem cuttings. Root primordia were formed by the dedifferentiation of callus paren- chyma cells and finally developed into adventitious roots. These anatomical observations indicate that callus is a prerequisite for the formation of adventitious roots and T. mongolica rooting belongs to callus rooting- type.
出处
《西北植物学报》
CAS
CSCD
北大核心
2014年第2期291-297,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
内蒙古自治区科技创新引导奖励资金项目(20121607)
关键词
四合木
扦插
不定根
解剖学
Tetraena mongolica Maxim.
cutting ~ adventitious roots ~ anatomy
