Effects of Four Rootstocks on Photosynthetic Characteristics of Sweet Cherry
Wei Guoqin
Fu Quanjuan
Sun Yang
Yang Xinghua
Kang Yujie
Sun Yugang
Abstract：In order to learn the effects of different rootstocks on photosynthetic characteristics of sweet cherry,taking 6 -year -old trees of Chelan as materials,which grafted with Cerasus Mahaleb,Colt,Gisela 5 and Cerasus pseudo Daqingye as rootstocks,the light response curve and diurnal variation of photosynthetic physiological parameters were measured by CIRAS -2 portable photosynthesis system.The results indicated that the variations of maximum photosynthetic rate (Pnmax ),apparent photosynthetic quantum yield (AQY) and light compensation point (LCP)were 13.279 ~21.599 μmol·m -2 ·s -1 ,0.036 ~0.046 and 20.699 ~41.619 μmol·m -2 ·s -1 respectively.The Pnmax of Chelan on Colt was the largest and showed the highest photosynthetic capacity under low intensity illumination,but the Pnmax of Chelan on Daqingye was the mini-mum.Chelan on Gisela 5 showed the lowest LCP.The diurnal variation of Pn presented a double -peak dis-tribution which means a midday depression occurred,while the transpiration rate (Tr),stomatal conductance (Gs)and carboxylation efficiency (CE)showed the similar trend.Diurnal variation of intercellular CO2 con-centration (Ci)presented a U type distribution.The water utilization efficiency (WUE)showed a gradual de-crease from 7∶00.Stomata limitation (Ls)is the main reason for the decrease of photosynthetic rate under high intensity illumination.Learn from the first peak value of the diurnal variation of photosynthesis,the Pn of Chelan on Colt was the largest (18.07 μmol·m -2 ·s -1 )and Chelan on Daqingye was the lowest 13.40μmol·m -2 ·s -1 .
Keywords：RootstockSweet cherryPhotosynthetic characteristicsPn -PAR response curveDiurnal variation of photosynthesis
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 43-47 )