萝卜花芽分化进程中形态特征与碳氮比变化的研究

Studies on the Morphological Characteristics and Changes of Carbon-nitrogen Ratio During the Process of Flower Bud Differentiation in Radish

将萝卜种子进行5℃春化处理并培育成苗后,观察萝卜植株茎尖生长锥的变化,同时测定分析其生长点和叶片的C/N比。结果表明:萝卜茎尖生长锥在花芽分化进程中发生0～5级的变化,并逐级详细描述,可为研究萝卜花芽分化各个时期植株内部生理生化变化提供参数。萝卜植株生长点的C/N峰值出现在现蕾期,叶片随花芽分化进程的加深而升高,可按萝卜栽培和育种目标提供营养调控依据。

The process of flower bud differentiation of radish was observed and carbon-nitrogen ratio in leaf and growing point of the radish were tested,after 5℃vernalization treatment of radish seeds.The results showed that the morphological characteristics of shoot-tip growth cone changed,the description of 0～5grades.This could supply parameter for the research of physiological-biochemical changes during the radish flower bud differentiation process.The carbon-nitrogen ratio in growing point reached the maximum at squaring period,and it continued increasing as flower bud differentiation process deepened in leaf,which could supply nutrient controlling technique according to cultivation and breeding aim.