Diurnal variation characteristics of photosynthesis and chlorophyll fluorescence of six grape varieties in greenhouse in Hotan area
[Objective]The diurnal variation characteristics of photosynthesis and chlorophyll fluorescence of greenhouse grape varieties in Hotan area were investigated,and their photosynthetic capacity was com-prehensively evaluated,in order to provide reference for the introduction and cultivation management of greenhouse grapes in this area.[Methods]Six grape varieties were introduced into Hotan greenhouse as materials.The photosynthetic active radiation(PAR),relative chlorophyll content(SPAD),photosynthe-sis,and chlorophyll fluorescence parameters of each variety were analyzed,and the principal component analysis was used to comprehensively evaluate the ability of each grape variety.[Results](1)The PAR levels of greenhouse in different positions were in the order:Before the shed＞behind the shed＞middle of the shed,while the overall performance in different trellis was in the order:On the trellis＞middle of the trellis＞under the trellis.(2)The SPAD values of grape leaves on different trellis were in the order:on the trellis＞middle of the trellis＞under the trellis,while the order from high to low among varieties:'Crimson Seedless','Summer Black','Xinyu','Hutai8','Sunshine Muscat',and'Queen Nina'.(3)The diurnal variation of Pn,Gs,and Tr of each variety showed a bimodal curve,and the diurnal variation of Ci showed a U-shaped and W-shaped variation.Fv/Fo and Fv/Fm generally showed a downward trend and then an upward trend.(4)The photosynthetic capacity of the six grape varieties was in the order:'Crimson Seedless'＞'Summer Black'＞'Sunshine Muscat'＞'Xinyu'＞'Hutai 8'＞'Queen Nina'.[Conclusion]'Crimson Seedless'and'Summer Black'have higher Pn,Gs,Tr,Fo,Fm and lower Fv/Fo and Fv/Fm,which are able to adapt to the Hotan environment of high temperature and high light intensity.
NETL
NSTL
万方数据
