文献类型：期刊文献

中文题名：不同浓度赤霉素处理对油桐花芽分化的影响

英文题名：Effects of different concentrations of gibberellin on fl ower bud differentiation in tung oil tree

作者：孙颖[1] 陈显[2] 刘儒[3] 李建安[1]

第一作者：孙颖

机构：[1]中南林业科技大学;[2]随州大洪山风景名胜区;[3]中国林业科学研究院亚热带林业实验中心

年份：2014

卷号：32

期号：1

起止页码：97-100

中文期刊名：经济林研究

外文期刊名：Nonwood Forest Research

收录：CSTPCD;;北大核心:【北大核心2011】；

基金：国家林业局行业公益性专项"红壤丘陵区经济林生态经营关键技术研究"(201104052);湖南省研究生创新基金项目"赤霉素对油桐成花调控"(CX2012B320)

语种：中文

中文关键词：赤霉素;油桐;花芽分化

外文关键词：gibberellin; tung oil tree; flower bud differentiation

分类号：S605.9;S794.3

摘要：为给以赤霉素调控油桐花期而提供理论依据,在油桐花芽生理分化期前,以浓度分别为50、100、200mg?L-1的外源赤霉素对油桐叶面进行喷施试验,并以未喷施赤霉素的作为对照(CK),分析了不同浓度赤霉素处理对油桐成花率、花芽分化临界期、有机营养成分(糖、淀粉)含量、内源激素(吲哚乙酸、脱落酸)含量的影响情况。结果表明:经过外源赤霉素处理的油桐植株其成花率均低于未喷施赤霉素的对照处理(CK),其中喷施了浓度为100 mg?L-1的赤霉素的油桐成花率高于其余两组处理;就花芽分化临界期而言,与对照处理(CK)相比,喷施了浓度为200 mg?L-1的赤霉素的油桐植株其花芽分化临界期延后时间为5 d,长于其余两组处理;在花芽生理分化过程中,油桐叶片中的可溶性糖含量,赤霉素处理各组的含量均低于对照处理(CK),其中,以浓度为100 mg?L-1的赤霉素处理的油桐其叶片中的含量高于其他两组处理;不同浓度外源赤霉素对油桐叶片中可溶性淀粉积累的抑制作用程度不同,200 mg?L-1外源赤霉素的抑制作用最为明显;对内源脱落酸(ABA)形成的抑制作用随着外源赤霉素浓度的增加而抑制作用显著增强,外源赤霉素处理有利于花芽生理分化期油桐叶片吲哚乙酸(IAA)的形成,且赤霉素的浓度越低越有利于吲哚乙酸(IAA)的形成。
In order to learn the effects of exogenous GA3 during tung oil tree flower bud differentiation process, and provide a theoretical basis for chemical regulation of the tung oil tree flowering phase, foliage spray experiments were done by using GA3 solution at different concentrations （50, 100, 200 mg · L^-1 and CK） before physiological differentiation period of tung oil tree flower buds. The effects of different concentrations of GA3 on flowering rate, critical period of flower bud differentiation, contents of organic nutrient （sugars and starch）, contents of endogenous hormone （IAA and ABA） were analyzed. The results show that flower ratioes in the GA3 treatments are lower than CK, and that in 100 mg · L^-1 GA3 treatment is higher than the other two treatments. The critical period of flower bud differentiation in 200 mg · L^-1 GA3 treatment is delayed for five days compared with CK, which is longer time than the other two treatments. Soluble sugar contents of leaves in the GA3 treatments are lower than CK during the flower bud physiological differentiation, and that in 100 mg · L^-1 GA3 treatment is higher than the other two treatments. Inhibition degrees of the GA3 treatments on soluble starch content of leaves are different, and inhibition effect of the 200 mg · L^-1 treatment is the most obvious. The inhibition to ABA is significantly strengthened with increasing the concentration of exogenous GA3. Exogenous GA3 is in favor of IAA formation in leaves during flower bud physiological differentiation, and the lower concentration of GA3 is more helpful to IAA formation.