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Guo, Jun-E,Li, Tian,Sun, Xianzhi,Zheng, Chengshu,Sun, Xia Korean Society of Horticultural Science 2015 원예과학기술지 Vol.33 No.1
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.
Jun-e Guo,Tian Li,Xianzhi Sun,Chengshu Zheng,Xia Sun 한국원예학회 2015 원예과학기술지 Vol.33 No.1
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.
Yaru Sun,Wenli Wang,Lan-yong Zhao,Chengshu Zheng,Fangfang Ma 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.5
Rosa rugosa ‘Shanxian’, a local variety of rose in Shandong Province, was studied for its aroma characteristics, includingchanges in aroma components and diff erential expression of aroma-related genes during fl owering. The volatiles emitted fromfl owers were collected by headspace solid-phase microextraction and analyzed by gas chromatography–mass spectrometry atthe budding stage, the early, half and full opening stages, and the withering stage. Sixty-six compounds were identifi ed, andthe full opening stage contained the highest level of every single aroma component compared with the other four stages. Themajor constituents of R. rugosa ‘Shanxian’ were alcohols, esters, ketones, aldehydes, phenols, and terpenes, with alcoholsbeing the most abundant. The aroma of R. rugosa ‘Shanxian’ was mainly characterized by rich fruit aromas, fl oral aromas, andsoft plant aromas. RrAAT , RrDXR , and RrDXS genes played a key role in monoterpene biosynthesis in R. rugosa ‘Shanxian’. The temporal and spatial expression of RrAAT , RrDXR , and RrDXS were measured at diff erent fl ower developmental stages. Among the three genes, the overall expression level of RrAAT was signifi cantly higher than that of RrDXR and RrDXS andwas associated with the accumulation of acetate esters in R. rugosa , which could be used as an important candidate gene forrose metabolism. Taken together, our results demonstrated that R. rugosa ‘Shanxian’ has better aromatic characteristics thanR. rugosa ‘Fenghua’. With a particularly prominent aroma that is strong and sweet, ‘Shanxian’ should be further investigatedas a valuable breeding material that could be used to enhance genetic diversity and develop new rose varieties.