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时间:2020-04-18
《干旱胁迫对不同大豆品种叶片光合及生理特性的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国油料作物学报2013,35(6):674—679ChineseJournalofOilCropSciencesdoi:10.7505/j.issn.1007—9084.2013.06.009干旱胁迫对不同大豆品种叶片光合及生理特性的影响徐晨,张鹏,徐克章,李大勇,季平,冯引娣,赵兰坡(1.吉林农业大学中药材学院,吉林长春,130118;2.吉林农业大学农学院,吉林长春,130118;3.吉林农业大学资源与环境学院,吉林长春,130118)摘要:采用盆栽试验,研究了干旱胁迫对4个抗旱大豆品种和4个普通大豆品种叶片的光合特性、叶绿素荧光特性和一些生
2、理特性的影响。结果表明,干旱胁迫下R2、R4、R6三个时期大豆叶片的净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)均呈下降趋势,普通品种相比抗旱品种下降更为显著;在R2期,胞间二氧化碳浓度(ci)下降较大,普通品种的下降最为显著,表观叶肉导度(AMC)变化极小;在R4期和R6期,ci下降幅度变小,AMC呈下降趋势,以普通品种的下降最为显著,推测光合能力下降可能与非气孔限制因素有关。干旱胁迫下光合电子传递量子效率(跚)、光化学猝灭(qP)和表观光合量子传递效率(ETR)均降低,非光化学猝灭(NPQ)升高,原初光能转化效率(/)变化不大。干旱胁
3、迫下叶片丙二醛、脯氨酸和可溶性糖含量增加。关键词:大豆(GlycineinaxL.);干旱胁迫;光合作用;气孔限制作用;水分利用效率中图分类号:Q945.11,$565.101文献标识码:A文章编号:1007—9084(2013)06—0674—06EfectsofdroughtstressonleafphotosynthesisandsomephysiologicaltraitsindiferentsoybeancultivarsXUChen,ZHANGPeng,XUKe—zhang,LIDa—yong,jIPing,FENGYin—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
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