摘要
在雌花芽分化阶段,应用气液色谱-电子捕获或氢焰离子技术,对3年生早、晚实类型核桃实生幼树分别检测了雌花芽和营养芽中内源细胞分裂素、赤霉素、生长素和脱落酸的水平。依次用它们的相对量来表示,两种芽中激素水平的变化可以简单描述如下: 雌花芽:(+,-,-,-); 营养芽:(-,+,+,+)。这个模式揭示:(1)雌花芽分化是四种激素作用于芽分生组织的某一特定平衡的结果;(2)细胞分裂素与赤霉素的比值与这些组织形成雌花原基的理论和实际能力有正相关的关系,雌花芽的比值为“+/-”或3.0,营养芽为“-/+”或1.2。对内源激素模式的实际意义,以及核桃童性的本质问题等也进行了讨论。
The endogenous hormone levels of cytokinin, gibberellin, auxin and abscisic acid in pistillate floral and vegetative buds,collected from early and late-fruiting types of 3-year-old walnut seedlings respectively,were measured using GLC-ECD or FTD at the stage of pistillate flower differentiation. Expressed sequentially as their relative amounts, the changes of these hormonal levels in both buds can be described simply and directly as follows, pistillate floral bud, (+,-,-,-); vegetative bud (-, +, +.+).
This pattern suggests that (1) pistillate flower differentiation is the result of a specific balance of the four hormones acting in bud meristem tissues, and (2) the ratio of cytokinins to gibberellins appears to be positively correlated with the theoretical and practical ability of these tissues to form pistillate floral primordia, where the ratio of pistillate floral bud was '+/-' or 3.0,and vegetative bud was '-/+' or 1.2.In this paper, the practical significance of the endogenous hormone pattern, and the nature of juvenility for walnut were also discussed.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1991年第4期401-409,共9页
Scientia Silvae Sinicae
基金
"七五"国家科技攻关项目"核桃早实丰产技术的研究"
关键词
核桃
花芽分化
内源激素
模式
Juglans regia L.
Flower bud differentiation
Cytokinin
Gibberellin
Auxin
Abscisic acid
Hormonal balance
GLC-ECD
