【摘要】 以月季‘传奇’（Rosa hybrida‘Legends’）切花为试验材料，在分析枝条皮层光合特性及其对离体枝段皮层吸水贡献的基础上，在瓶插期对浸在水中的枝条进行黑暗和光照(200μmol·m^-2·s^-1)处理，研究枝条光照处理对切花瓶插寿命的延长效应。结果表明，枝条皮层总叶绿素含量为叶片的24.30%，皮层组织的最大光化学效率显著高于木质部和髓心。在200μmol·m^-2·s^-1的光合有效辐射下，枝条皮层净光合速率达到峰值(0.15μmol·m^-2·s^-1)。对于浸在水中的离体枝段，200μmol·m^-2·s^-1光照处理使枝段皮层吸水量显著提高了50%。与黑暗处理相比，在瓶插期对浸在水中的枝条照光，可显著增加枝条皮层的可溶性糖含量，提高切花的水分平衡值，减缓花枝水势降低，抑制叶片光合速率下降，进而维持了花朵开放所需的水分和糖分，显著增大了切花花径，减缓了鲜质量下降，将瓶插寿命延长了4 d。更多还原

【Abstract】 Cut rose（Rosa hybrida‘Legends’）was used as the experimental material in this study.The photosynthetic characteristic of the branch cortex chlorenchyma and its contribution to the cortex water uptake of isolated branch segment were investigated. On the basis,the branches of cut rose immersed in water were treated with dark and light(200 μmol · m^-2 · s^-1)to study the effects of branch illumination on vase life prolonging of cut rose. Results showed that the total chlorophyll concentration in the cortex of the branch was about 24.30% of that in the leaves. And the maximum photochemical efficiency of cortex was significantly higher than that of xylem and pith in the cross section of branch.When exposed to the photosynthetically active radiation of 200 μmol · m^-2 · s^-1,the net corticular photosynthesis rate of cut rose branch peaked at 0.15 μmol · m^-2 · s^-1. In relative to dark treatment,cortex water uptake content was significantly increased by 50% in the isolated branch segments illuminated with the 200 μmol · m^-2 · s^-1 light condition. Compared with the dark treatment,light treatment significantly increased the content of soluble sugar in the cortex of water-soaked branch,improved the water balance value,slowed down the decrease of water potential and inhibited the decrease of photosynthetic rate of leaves. These effects maintained the supply of water and soluble sugar required for cut rose flowering,increasing the flowers diameter significantly,slowing down the decrease of fresh weight,and prolonging the vase life by four days.更多还原