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1、中國油料作物學(xué)報2013,35(6):674—679ChineseJournalofOilCropSciencesdoi:10.7505/j.issn.1007—9084.2013.06.009干旱脅迫對不同大豆品種葉片光合及生理特性的影響徐晨,張鵬,徐克章,李大勇,季平,馮引娣,趙蘭坡(1.吉林農(nóng)業(yè)大學(xué)中藥材學(xué)院,吉林長春,130118;2.吉林農(nóng)業(yè)大學(xué)農(nóng)學(xué)院,吉林長春,130118;3.吉林農(nóng)業(yè)大學(xué)資源與環(huán)境學(xué)院,吉林長春,130118)摘要:采用盆栽試驗,研究了干旱脅迫對4個抗旱大豆品種和4個普通大豆品種葉片的光合特性、葉綠素?zé)晒馓匦院鸵恍┥?/p>
2、理特性的影響。結(jié)果表明,干旱脅迫下R2、R4、R6三個時期大豆葉片的凈光合速率(Pn)、氣孔導(dǎo)度(Gs)和蒸騰速率(Tr)均呈下降趨勢,普通品種相比抗旱品種下降更為顯著;在R2期,胞間二氧化碳濃度(ci)下降較大,普通品種的下降最為顯著,表觀葉肉導(dǎo)度(AMC)變化極??;在R4期和R6期,ci下降幅度變小,AMC呈下降趨勢,以普通品種的下降最為顯著,推測光合能力下降可能與非氣孔限制因素有關(guān)。干旱脅迫下光合電子傳遞量子效率(跚)、光化學(xué)猝滅(qP)和表觀光合量子傳遞效率(ETR)均降低,非光化學(xué)猝滅(NPQ)升高,原初光能轉(zhuǎn)化效率(/)變化不大。干旱脅
3、迫下葉片丙二醛、脯氨酸和可溶性糖含量增加。關(guān)鍵詞:大豆(GlycineinaxL.);干旱脅迫;光合作用;氣孔限制作用;水分利用效率中圖分類號:Q945.11,$565.101文獻(xiàn)標(biāo)識碼:A文章編號:1007—9084(2013)06—0674—06EfectsofdroughtstressonleafphotosynthesisandsomephysiologicaltraitsindiferentsoybeancultivarsXUChen,ZHANGPeng,XUKe—zhang,LIDa—yong,jIPing,F(xiàn)ENGYin—di,ZHA
4、OLan—po(1.CollegeofTraditionalChineseMedicine,JilinAgriculturalUniversity,Changchun130118,China;2.CollegeofAgronomy,JilinAgriculturalUniversity,Changchun130118China;3.CollegeofResourceandEnvironmentalScience,filinAgriculturalUniversity,Changchun130118,China)Abstract:Variationo
5、fphotosyntheticcharacteristics,leafchlorophyllfluorescencecharacteristicsandsomephysiologicalcharacteristicsoffourdrought——resistantsoybeanvarietiesandfourordinarysoybcanvarietieswerein-vestigatedunderdroughtstress.Theresultsshowedthatthenetphotosyntheticrate(Pn),stomatalcondu
6、ctance(Gs)andtranspirationrate(Tr)ofthreegrowthstagesweredeclinedunderdroughtstress.Theordinarysoybeanvarietiesweremoredeclinedthandrought—resistantvarieties.TheintercellularCO2concentration(Ci),especiallyoftheordinarysoybeanvarietiesdecreasedsignificantlyatR2stage.Theapparent
7、mesophyllconductance(AMC)hadnOobviouschangeatR2.TheCidecreasedlessthanR2andtheAMCdecreasedatR4andR6.neordinaryvarietiesdecreasedsignificantly.Thissuggestedthatthestomatallimitationmighthaveledtophotosynthesisde—cline.Thephotosyntheticelectrontransferquantumeficiency(PSII)andph
8、otochemicalquenching(qP)andapparentphotosyntheticquantumtrans