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Study on the Relationship of Changes of the Endogenous Hormone Content in Castanea mollissima and Bud Differentiation(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2013年22期
Page:
5-9
Research Field:
Publishing date:

Info

Title:
Study on the Relationship of Changes of the Endogenous Hormone Content in Castanea mollissima and Bud Differentiation
Author(s):
CHENG Hua1; 2; LI Lin-ling1; 2; YUAN Hong-hui1; 2; XU Xiang-yang1; WANG Yan1; 3; CHENG Shui-yuan1; 2
1.Economic Forest Germplasm Improvement and Comprehensive Utilization of Resources of Hubei Key Laboratories,Huanggang,Hubei 438000;
2.College of Chemistry and Life Science,Huanggang Normal University,Huanggang,Hubei 438000;
3.Technology Education Department,Forestry Department of Hubei Province,Wuhan,Hubei 430079
Keywords:
Castanea mollissima; endogenous hormones; ratio; variation
PACS:
S 664.2
DOI:
-
Abstract:
In order to evaluate the relationship between floral bud differentiation and the hormone changes (IAA,GA3,ZR,ABA) in chestnut,the major cultivars,‘Bayuehong’,‘Wukeli’,‘Zhongguozaoli’,‘Meiguihong’ were selected as the testing materials.The relationship was analyzed by HPLC.The results showed that the IAA content had showed a rising state during the process of flower bud differentiation in chestnut and maintained at a higher revel.ABA content increased and then decreased and rised at last.GA3 content increased at first and then decreased.It maintained at a low content state at last.ZR content increased firstly and then slowed down in the process.Comprehensive analysis showed chestnut bud tip before winter required a certain concentration of IAA,IAA had larger impact on bud stage;the low level of ABA was beneficial to differentiation and growth of chestnut flower;GA3 was helpful to break dormancy and it was favorable to conversing to the inflorescence primordium and inflorescence primordium.Primordium and the flower clusters required to maintain certain levels of GA3,and high levels of ZR may had a promoting effect on the chestnut bud.In the analysis process of ZR/IAA,GA3/IAA,ABA/IAA and GA3/ZR value,ZR/IAA,GA3/IAA and ABA/IAA showed a step change.It was a process of first increase and decrease followly,while GA3/ZR value had been declining,and then maintained a lower value.The proportion of endogenous hormone in the chestnut bud in the entire process was analysed,high levels of ZR/IAA,GA3/IAA and ABA/IAA were conducive to chestnut shoots before winter breaking into flower bud dormancy period,but the period of the inflorescence rimordial into flower clusters rimordial required a lower level of ZR/IAA,GA3/IAA and ABA/IAA.Proportion of endogenous hormones through trend analysis showed that chestnut flower bud tip before winter and the various stages of the process with the endogenous hormone balance were closely linked.

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Last Update: 2014-08-06