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Effect of Soil Drought Stress on the Ultramicrostructures of Chloroplasts and Mitochondria in Three Desert Plants with Different Photosynthetic Types

干旱胁迫对3种不同光合类型荒漠植物叶绿体和线粒体超微结构的影响



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,2016,36(6):1155-1162
犃犮狋犪犅狅狋.犅狅狉犲犪犾.犗犮犮犻犱犲狀狋.犛犻狀.
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犈犳犳犲犮狋狅犳犛狅犻犾犇狉狅狌犵犺狋犛狋狉犲狊狊狅狀狋犺犲犝犾狋狉犪犿犻犮狉狅狊狋狉狌犮狋狌狉犲狊狅犳犆犺犾狅狉狅狆犾犪狊狋狊犪狀犱
犕犻狋狅犮犺狅狀犱狉犻犪犻狀犜犺狉犲犲犇犲狊犲狉狋犘犾犪狀狋狊狑犻狋犺犇犻犳犳犲狉犲狀狋犘犺狅狋狅狊狔狀狋犺犲狋犻犮犜狔狆犲狊
WENZhibin1,LAZITIKuliku2,ZHANGMingli1,3
(1XinjiangInstituteofEcologyandGeography,ChineseAcademyofSciences,KeyLaboratoryofBiogeographyandBioresource
inAridLand,Urumqi830011,China;2ColegeofLifeScience,XinjiangNormalUniversity,Urumqi830054,China;3Institute
ofBotany,ChineseAcademyofSciences,Beijing100093,China)
犃犫狊狋狉犪犮狋:Threedesertplantswithdifferentphotosynthetictypes,includingC3plant犛犪犾狊狅犾犪犼狌狀犪狋狅狏犻犻,C3
C4plant犛.犾犪狉犻犮犻犳狅犾犻犪andC4plant犛.犪狉犫狌狊犮狌犾犪,wereusedtoinvestigatetheeffectofsoildroughtstress
ontheultramicrostructureofmesophylcelsunderpotcultureconditionusingtransmissionelectronmi
croscope.Theresultsshowedthat:(1)Underthenormalwaterstate,theorganelesofmesophylcels
keptintegrity.(2)Undertheslightdroughtstress,theultramicrostructureofthreeplantswerenotdam
aged.(3)Undertheconditionofmoderatedroughtstress,for犛.犼狌狀犪狋狅狏犻犻and犛.犾犪狉犻犮犻犳狅犾犻犪,wal
boundaryofmesophylcelswerenotclearandthethylakoidsexpanded,butthedifferencesbetweenthese
twoplantswerethatmitochondriaof犛.犼狌狀犪狋狅狏犻犻firstlyappeareddegradation,anditsinclusionswere
partlylost.For犛.犾犪狉犻犮犻犳狅犾犻犪,theoutermembraneofmitochondriawasdeformedandtheridgeswerere
duced.Themitochondriaof犛.犪狉犫狌狊犮狌犾犪remainednormal,butthechloroplastsslightlyexpanded.(4)
Undertheseveredroughtstress,thechloroplastsof犛.犼狌狀犪狋狅狏犻犻and犛.犾犪狉犻犮犻犳狅犾犻犪weredamagedandmi
tochondriaweredegraded.For犛.犪狉犫狌狊犮狌犾犪,thechloroplastsexpanded,theoutermembraneofmitochon
driawasdeformedandtheridgeswerereduced.Theseresultshaveshowedthatthedamagedegreeof犛.
犪狉犫狌狊犮狌犾犪inchloroplastsandmitochondriaunderdifferentdegreeofdroughtstresswasthelowest;For犛.
犼狌狀犪狋狅狏犻犻and犛.犾犪狉犻犮犻犳狅犾犻犪,thedamagedegreeofchloroplastsunderdroughtstresswassimilar;themi
tochondriahadbettertolerancetodroughtstressthanchloroplastsin犛.犾犪狉犻犮犻犳狅犾犻犪and犛.犪狉犫狌狊犮狌犾犪.
犓犲狔狑狅狉犱狊:soildroughtstress;chloroplast;mitochondria;photosynthetictype;desertplant;Chenopodi
aceae
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Fig.2 Ultramicrostructuresofchloroplastsandmitochondriainmesophylcelsofthreespeciesunderslightdroughtstress
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Fig.3 Ultramicrostructuresofchloroplastsandmitochondriainmesophylcelsofthreespeciesundermoderatedroughtstress
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