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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (6): 1343-1354.doi: 10.16420/j.issn.0513-353x.2022-0349

• Cultivation Physiology & Biochemistry • Previous Articles     Next Articles

Effect of Branch Light Treatment on Prolonging the Vase Life of Cut Rose

MA Mengyu, HU Yaofang, GU Lin, LI Zhenjian, QIAN Yongqiang, JU Guansheng, LIU Junxiang(), SUN Zhenyuan()   

  1. Key Laboratory of Tree Breeding and Cultivation of National Forestry and grassland Administration,Research Institute of Forestry,Chinese Academy of Forestry,Beijing 100091,China
  • Received:2022-04-04 Revised:2023-01-16 Online:2023-06-25 Published:2023-06-27
  • Contact: * (E-mail:jxliu@caf.ac.cnsunzy@caf.ac.cn

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.

Key words: Rosa hybrida, corticular photosynthesis, vase life, cortex water uptake, soluble sugar

CLC Number: