文献类型：期刊文献

中文题名：6-BA、GA_3调控春石斛花芽分化的效应

英文题名：Physiological Effects of 6-BA and GA_3 on Flower Bud Differentiation of Nobile Type Dendrobium

作者：李振坚[1] 王雁[1] 彭镇华[1] 王彩云[2] 缪崑[1] 于耀[3]

第一作者：李振坚

机构：[1]中国林业科学研究院林业研究所国家林业局林木培育重点实验室;[2]华中农业大学园艺林学学院;[3]山西农业大学园艺学院

年份：2009

卷号：38

期号：1

起止页码：15-18

中文期刊名：亚热带植物科学

外文期刊名：Subtropical Plant Science

基金：中央级公益性科研院所专项基金(2060302);"948"国家林业局引进项目(2006-4-C07);科技部"十一五"科技支撑计划项目(No.2006BAD07B05)资助

语种：中文

中文关键词：春石斛;生长调节剂调控;6-BA;GA3;花芽分化

外文关键词：nobile type dendrobium; hormonal regulation; 6-benzylaminopurine（6-BA）; gibberellin（GA3）; floral bud differentiation

分类号：S682.31;Q946.885

摘要：调查了春石斛假鳞茎封顶和增粗的生长情况,并以不同浓度6-BA、GA3溶液进行灌根处理,观测其对花芽分化的效应。结果表明,假鳞茎的增粗阶段在9月15日至10月10日,经过约50 d增粗生长,假鳞茎粗度迅速增加。其间,6-BA、6-BA+GA3处理对春石斛花芽分化有促进作用。3种6-BA浓度作用效果明显,最佳为400 mg/L;6-BA添加低浓度GA3,对花芽分化有增效作用,其中以6-BA 200 mg/L添加GA3 50 mg/L效果最佳。GA3作用效果不稳定,浓度为25 mg/L时叶片脱落不明显,高于50 mg/L则叶片大量脱落。
Based on the investigation of pseudobulbs horizontal elongation and growth of nobile type dendrobium, the effects of growth regulators such as GA3, 6-BA on the floral bud differentiation were studied. The results showed that the rapidly thickening stage of the pseudobulbs were from September 15th to October 10th, about 50 d. The growth regulators of 6-BA, 6-BA＋GA3 improved the floral bud differentiation of nobile type dendrobium during this period. Three different concentration treatments of 6-BA promoted floral bud differentiation significantly, and the concentration of 400 mg/L was the best. Proper concentration of 6-BA plus GA3 also promoted flower bud initiation. The optimum concentration of the three treatments was 6-BA 200 mg/L＋ GA3 50 mg/L. The effects of GA3 on the flower bud initiation were not steady. The defoliation phenomena was not obvious under GA3 concentration below 25 mg/L while large numbers of leaves fallen off with GA3 concentration above 50 mg/L.