不同生育时期的牡丹叶片和花瓣光合相关生理指标变化分析  

Changes on physiological index related to photosynthesis in leaves and petals of tree peony at different developmental stage

作　　者：崔洋[1] 张凌[1] 李永华[1] 杨秋生[1] 

机构地区：[1]河南农业大学林学院,河南郑州450002

出　　处：《河南农业大学学报》2014年第1期29-33,共5页Journal of Henan Agricultural University

基　　金：科技部农业科技成果转化资金项目(2011GB2D000014);河南省科技攻关重点项目(102102110033)

摘　　要：以牡丹(Paeonia suffruticosa Andr.)品种‘胡红’为试材,测定了牡丹开花前后不同生育时期叶片和花瓣中糖组分含量和光合作用变化.结果表明:叶片和花瓣中葡萄糖与果糖含量变化均呈先上升后下降的趋势,叶片中葡萄糖和果糖含量在破绽期达到最高,与风铃期相比分别升高44.63%与49.06%;花瓣中葡萄糖和果糖含量开花期达到最高,分别升高66.49%与72.53%,花瓣中果糖含量比叶片高27.64%.叶片破绽期蔗糖含量比风铃期升高42.9%,开花期达到最低点(下降25.31%);花瓣中蔗糖含量逐渐上升,但一直低于叶片.叶片和花瓣淀粉含量的变化一致,叶片高于花瓣.叶片净光合速率表现出先升后降的趋势,在破绽期达到最高值,这与葡萄糖和果糖的变化趋势一致.叶片中净光合速率与蔗糖含量变化趋势相似,开花期叶片中蔗糖向花瓣转移,为牡丹开花提供能量.Using tree peony （Paeonia suffruticosa Andr. ） cultivar ＇ HuHong＇ as experimental materials,the contents of sugar component and photosynthesis in leaves and petals were determined at 5 developmental stages in order to discuss the transport mechanism of sugar component. The results showed that the content of glucose and fructose in leaves and petals ascended first and then descended, and the content of glucose and fructose ：in leaves reached the maximum at flawing stage which were 44.63% and 49.06% higher than those at companula stage respectively; However, at blooming stage, those in petals reached the maximum which were 66.49% and 72.53% higher, content of glucose in petals was 27.64% higher than that in leaves. Sucrose content in leaves increased by 42.9% at flawing stage in contrast to that at companula stage, and this index reached its minimum （ decreased by 25.31% ） at blooming stage. At 5 developmental stages, sucrose content in petals increased gradually, but was lower than that in leaves. Starch content in leaves and petals appeared similar changing trend, which was higher in leaves than in petals. The photosynthetic rate in leaves reached the maximum at flawing stage, its changing trend similar to that of glucose and fructose. The changing trend of net photosynthetic rate （Pn） in leaves is similar to that of sucrose content in leaf, namely, the sucrose transforms from leaf to petal at full blooming stage in order to provide energy for flowering.

关 键 词：牡丹 叶片 花瓣 糖组分 光合生理 

分 类 号：S685.11[农业科学—观赏园艺]