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Effect of Low Temperature on Physiological Index of Cold-tolerant Casuarina glauca Clones

低温处理对耐寒粗枝木麻黄无性系生理指标的影响



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 2011,24(4):523 526
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EfectofLowTemperatureonPhysiologicalIndexof
ColdtolerantCasuarinaglaucaClones
HEGuiping1,ZHUORenying1,CHENYuchun2,HUANGYiqing3,PENGLiuqing2
(1.ResearchInstituteofSubtropicalForestry,ChineseAcademyofForestry,Fuyang 311400,Zhejiang,China;
2.CenturySunshineLandscapeEngineeringCo.Ltd.ofShangyu,Shangyu 312300,Zhejiang,China;
3.TheResearchInstituteofAgricultureofCixiCity,ZhejiangProvince,Cixi 315300,Zhejiang,China)
Abstract:ColdtolerantclonesofCasuarinaglaucawereestablishedthroughvegetativereproductionoftheplants
survivedunderlowtemperature(-5—6℃)stress.Thephysiologicalcharacteristicsoftwocoldtolerantclones
andthecontrolat4lowtemperaturegradienttreatmentsfrom -2℃ to-11℃ weretested.Theresultsshowed
thattherelativeconductivity,solubleproteincontent,MDAcontentandSODactivityofalclonesincreasedwith
thetemperaturedecrease.TherelativeconductivityoftwocoldtolerantC.glaucacloneswerelowerthanthatofthe
control,whilethesolubleproteincontent,MDAcontentandSODactivitywerehigherthanthatofthecontrol.The
relativeconductivity,thesolubleproteincontent,MDAcontentandSODactivitycanbeusedasscreeningindexfor
thecoldtoleranceidentificationofC.glauca.TheCi36clonewasstrongercoldtolerantthanCi24clone.
Keyword:Casuarinaglauca;coldtolerance;clone;physiologicalindex
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