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Relationship between Endogenous Polyamines and Floral Bud Differentiation in Chrysanthemum morifolium under Short-day Conditions
Jun-e Guo12
,
Tian Li12
,
Xianzhi Sun12*
,
Chengshu Zheng12
,
Xia Sun12
1College of Horticulture Science and Engineering, Shandong Agricultural University
2State Key Laboratory of Crop Biology, Shandong Agricultural University
*교신저자. *Corresponding Author. 
28 February 2015. pp. 31-38
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Abstract

This study was carried out to investigate the relationship between endogenous polyamines (PAs) and floral bud differentiation in chrysanthemum (Chrysanthemum morifolium). In this study, PA content (free, bound, and conjugated) in apical buds, leaves, and roots changed appreciably during floral bud differentiation. PAs accumulated during series of processes such as floral induction, differentiation of floret primordia, and crown formation in apical buds; changes in PAs in apical buds may have a relationship with those in leaves and roots. The levels of free PAs and conjugated PAs [putrescine (Put) and spermine (Spm)] in apical buds rapidly increased during the initiation stage of floral bud differentiation, while free and conjugated spermidine (Spd) reached their highest levels at the stage of floret primordium differentiation. In the free, conjugated, and bound PA fractions, the changes in Spm content were negligible compared to those of Put and Spd throughout the experiment. These findings indicate that PAs participate in regulating the process of flower bud differentiation in chrysanthemum.

Keywords
floral initiation
microscopic observation
photoperiod induction
polyamine metabolism
HPLC

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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :한국원예학회
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 33
  • No :1
  • Pages :31-38
  • Received Date : 2014-03-10
  • Revised Date : 2014-09-17
  • Accepted Date : 2014-09-23
  • DOI :https://doi.org/10.7235/hort.2015.14043
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