资源描述：
《水分胁迫对不同基因型棉花光合特性的影响》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、ABSTRACT【Object】Theresultswasexpectedtostudytheadaptabilitytodroughtofthecotton’sphotosynthesis、yieldandqualitycharacter,thentorevealtheirrelationandalsotoselectsuperiorcottonwithgreatresistancetodroughtbyanalyzingthedifferencesofcotton’scharacteristic.Thisstud
2、ywasexpectedtoprovideatheoryforselectingcultivarsofstrongwater-limitedtolerance.【Method】Fifty-twointroducedcultivarsofprematuritycottongermplasmresourceandsixlargeareasharesmainplantcottonmaterialsofthenorthernpartofXinJiangasthetestmaterial.Inthedropwaterplant
3、ingmodeofXinJiang,usingnormalwateringanddroughtstressasthetwotreatmentsoftheexperiment.Theresponseofphotosynthesischaracter,fluorescencecharacter,yieldandqualitycharacteristicunderwaterstressduringthebudstage,flowerseason,cottonbollseasonandflocsseasonofthetest
4、cottonresourceareanalyzed.Thedroughtresistanceofthetestresourcesaregradingevaluatedbysensitivestressindexnumbermethod,differentanti-droughtgenotypiccottonphenotypewasapproached.【Results】1）Therewassignificantvariationofcottonphotosynthesisparametersatdifferentpe
5、riodunderthetwowatertreatment,andthegeneticvariationofnetphotosyntheticratechangedremarkably.2)Whenthecottonwaswellirrigated,alltheaveragevalueofnetphotosyntheticrateweremaximumatflowerperiodandbollperiod,besides,thedifferenceamongallthecottonwasminimumatthesep
6、eriods;theaveragevalueofnetphotosyntheticratewaslittleatbudperiodandthedifferencewasgreat;andthesameparameter3）Fv/Fm、PI、Fv/F0hadnosignificantchangeunderwaterstress,comparedtothecorrespondentfluorescenceparametersundernormalwatercondition.4）SPADincreasedafterwat
7、erstress,andthevariationwasrelativelydiminutive.5）Cottonproductionwasaffectmarkedly,Seedcottonyield、Bollplant、lintproductionyieldweresensitivetowaterstress,whilebollweightandlintproportionhadnosignificantchange.6）Fiberlength、fiberuniformity、fiberstrength、elonga
8、tionratedecreased5.09%、1.15%、1.52%、0.72%,respectively,afterwaterstress,whilemicronairevalueincreased13.9%，makethevariationofthetestedvarietiesincrease.【Conclusion】1)Itisbett
