摘要
以牡丹(Paeonia suffruticosa)品种‘洛阳红’和‘胡红’为材料,研究了花开放和衰老过程中花瓣可溶性糖及其代谢相关酶活性的变化。结果表明:伴随花瓣的迅速生长展开,总可溶性糖呈现迅速增加的趋势,特别是己糖(葡萄糖和果糖)含量显著增加,盛开后己糖水平达到最高,而蔗糖含量呈现逐渐下降的变化。己糖和蔗糖降解指数(SDI)与花枝质量呈现极显著的正相关;花瓣酸性转化酶活性维持较高水平,开花过程中活性逐渐升高,开放后逐渐下降。经主成分回归分析,可溶性糖的代谢依赖于酸性转化酶、中性转化酶、蔗糖合成酶和蔗糖磷酸合成酶的共同作用。结果提示,牡丹花瓣中己糖的积累在花开放和衰老过程中起着重要作用。
To clarify the mechanism of flower opening and senescence in tree peony （Paeonia suffruticosa）‘Luoyanghong＇ and ‘Huhong＇ , we investigated sugar metabolism in the petals of two tree peony cuhivars. The results showed that total soluble sugar content increased rapidly with the cell enlargement in the petals and during flower senescence. The contents of hexoses （glucose and fructose） markedly increased during flower opening and reached a highest level at full-opening, but the content of sucrose dropped gradually. The hexose content and sucrose degradation index （SDI） were positively correlated with the fresh weight of flower. The activity for acid invertase （AI） increased during flower opening and decreased after the flowers opened. Based on regression analyses, the soluble sugar metabolism was related to the actions of the 4 enzymes, viz. acid invertase （AI）, neutral invertase （NI）, sucrose synthase （SS） and sucrose phosphate synthase （SPS）. Our results suggest that hexose accumulation in the petal might be important for flowering opening and senescence in tree peony.
出处
《园艺学报》
CAS
CSCD
北大核心
2009年第8期1184-1190,共7页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(30740013)
河南省自然科学基金项目(0611030600)
洛阳市重点实验室专项(0901063A)
关键词
牡丹
花发育
转化酶
伸长生长
糖
代谢
Paeonia suffruticosa
flower development
invertase
elongation growth
sugar
metabolism
