资源描述：
《花后渍水高温交互效应对冬小麦旗叶光合特性及产量的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、作物学报ACTAAGRONOMICASINICA2012,38(6):1071−1079http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2012.01071花后渍水高温交互效应对冬小麦旗叶光合特性及产量的影响1,21,*1111吴进东李金才魏凤珍王成雨张一武文明12安徽农业大学农学院,安徽合肥230036;皖西学院,安徽六安237012摘要:渍水和高温是长江中下游麦区
2、冬小麦(TriticumaestivumL.)生育中后期的主要气象灾害因子。2009—2011年连续2个生长季盆栽烟农19,在籽粒形成期(花后5~8d)和乳熟期(花后15~18d)分别设渍水(土表水层1cm)、高温[昼(35±2)℃/夜(25±2)℃]和渍水+高温处理,探讨了渍水和高温双重胁迫对小麦开花后光合特性及产量的影响。结果表明,花后渍水、高温、渍水+高温逆境均显著降低旗叶净光合速率(Pn)、叶绿素含量(SPAD值)、气孔导度(Gs)和蒸腾速率(Tr),增加胞间CO2浓度(Ci);同时降低穗粒数、千粒重及产量,但对成穗数影响不显
3、著。渍水和高温胁迫对旗叶光合作用的主要限制因素是非气孔因素。从产量平均相对受害率看,其影响为渍水+高温逆境(37.7%)>渍水逆境(21.1%)>高温逆境(17.6%),而胁迫时期的影响为籽粒形成期(30.8%)>乳熟期(20.1%)。渍水和高温的交互效应显著,且籽粒形成期逆境不良效应显著大于乳熟期。关键词:冬小麦;渍水;高温;渍水高温交互效应;光合特性;产量EffectofInteractionofWaterloggingandHighTemperatureafterAnthesisonPhotosyntheticCharacter
4、isticsofFlagLeafandYieldinWinterWheat1,21,*1111WUJin-Dong,LIJin-Cai,WEIFeng-Zhen,WANGCheng-Yu,ZHANGYi,andWUWen-Ming12AgriculturalCollege,AnhuiAgriculturalUniversity,Hefei230036,China;WestAnhuiUniversity,Lu’an237012,ChinaAbstract:Waterloggingandhightemperaturearemainstre
5、ssfactorsduringlategrowingperiodofwinterwheat(Triticumaesti-vumL.)inYangtzeValleyregionofChina.Tounderstandtheeffectofinteractionofwaterloggingandhightemperatureonpho-tosyntheticcharacteristicsandgrainyieldofwheat,wecarriedoutapotexperiment,usingthevarietyofYannong19,in
6、continu-ousgrowingseasonsfrom2009to2011.Atgrain-forming(5–8dafteranthesis)andmilking(15–18dafteranthesis)stages,wa-terlogging(1cmofsurfacewaterlayer),hightemperature(35±2°Cofdaytime/25±2°Cofnighttime),andwaterlogging+hightemperaturestresseswereimposedtowheatplants,separ
7、ately.Waterlogging,hightemperature,andbothstressesshowedsignifi-cantlyeffectsonphotosyntheticcharacteristicsofflagleafandyieldreducingphotosyntheticrate(Pn),chlorophyllcontent(SPADreading),stomatalconductance(Gs),andtranspirationrate(Tr);enhancingintercellularCO2concent
8、ration(Ci);anddeclininggrainnumberperspike,1000-grainweight,andgrainyield.However,inthecase,spikenumberperpotw
