Abstract

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Title:: Growth,PhysiologicalandBiochemicalResponsesof PrimulapseudodenticulataPaxtoShading

Author(s):: SHAOChangfen1; LIDefa1; GUANWenling2; LIShifeng3; CAIYanfei3; SHONGJie3; (1.DepartmentofFinanceandBusiness，ChongqingVocationalInstituteofTourism,Chongqing409000；2.CollegeofLandscapeandHorticulture,YunnanAgriculturalUniversity,Kunming,Yunnan650201；3.FlowerResearchInstitute,YunnanAcademyofAgriculturalSciences,Kunming,Yunnan650205)

Keywords:: PrimulapseudodenticulataPax; shading; chlorophyll; photosyntheticcharacteristics; biomass

Abstract:: PrimulapseudodenticulataPaxwasusedastestmaterial.PhysiologicalandbiochemicalresponsesofPrimulapseudodenticulataPaxwasstudiedatthedifferentdegreesofshades(0%(CK),40%,65%,85%).InordertostudytheneedsandadaptabilitytosunlightofPrimulapseudodenticulataPax.Theresultsshowedthatwiththeincreasingofshadingintensity,crownwidthincreased,leafnumberandstolonnumberdecreased.Thechlorophyllcontentincreasedfirstandthendecreased.Leafwatercontent,leafbiomassratio,apparentquantumefficiencygraduallyincreased.Rootbiomassratio,rootshootratioandleafweightratiodecreased.Thelightcompensationpoint,thelightsaturationpointandthemaximumnetphotosyntheticratedecreased.TheconclusionshowedthattheshadetoleranceofPrimulapseudodenticulataPaxwasstronger,andcouldbeusedasplantingmaterialundertheforest.