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1、作物学报ACTAAGRONOMICASINICA2008,34(8):1459−1463http://www.chinacrops.org/zwxb/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2008.01459棉花源库比对中、下部果枝叶生理活性及铃重的影响*孙红春李存东张月辰路文静(河北农业大学/河北省作物生长调控实验室,河北保定071001)摘要:以转基因抗虫杂交棉中棉所29(CCRI29)为材料,通过去叶和去蕾处理,研究改变
2、源库比对大田棉花中、下部果枝叶生理活性的影响。结果表明：减库处理可以提高中、下部果枝叶片中蛋白质的含量,促进后期果枝叶中叶绿素的合成,延长叶片功能期。减源处理促进中、下部果枝叶生长前期果枝叶中叶绿素含量,表现出暂时性的超补偿效应,但是在果枝叶生长后期,叶绿素含量快速下降;并且减源处理不利于叶片中蛋白质的合成。提高源/库比、降低源/库比均降低了中、下部果枝叶中SOD和POD活性,对MDA含量的影响为：减源＞CK＞减库。源库比例的改变影响叶片的寿命和功能,改变棉花源库比,打破了源库平衡,其叶片的生理活性也会发生相应变化。受源器官生理特性变化的影响
3、,不同处理单铃重差异较大,表现为减库＞CK＞减源。关键词:棉花;源库比;果枝叶;生理活性EffectsofSource/SinkRatioonBollWeightandPhysiologicalActivitiesofLeavesatMiddleandLowerFruitingBranchesinCotton*SUNHong-Chun,LICun-Dong,ZHANGYue-Chen,andLUWen-Jing(HebeiKeyLaboratoryofCropGrowthRegulation/AgriculturalUniversityofH
4、ebei,Baoding071001,Hebei,China)Abstract:Cottonisoneofimportantcashcrops,butsofar,fewstudiesonthebollandleafsystematthesamenodepositionincottonwerereported.Inthisstudy,theeffectsofsource/sinkratioongrowthanddevelopmentandphysiologicalcharacteristicsincottonwereevaluatedusing
5、CCRI29,aBT-transgenichybridcottoncultivar.Threetreatmentsweredesignedintheexperiment:pickingoffbudsonthefruitbranchat8dafteranthesisforleavingtwoorthreeleavestosupportoneboll(PB),pickingoffsomeleavesonthefruitbranchat8dafteranthesisforleavingoneleaftosupporttwobolls(PL),and
6、normaltrainingmanagements(CK).TheresultsindicatedthatinPBtreatment,thecontentofsolubleproteinincreasedandthechlorophyllcontentinthelatergrowthstageboostedinmiddleandlowerfruitbranchleaves,prolongingthefunctionperiodoftheleaves.InPLtreatment,thechlorophyllcontentofleaveswasp
7、romotedintheearliergrowthstage,anddecreasedsharplyinthelatergrowthstage,andthesolubleproteincontentofleaveswasthelowestamongthethreetreatments,suggestingthattherewasatemporarilyphysiologicalcompensationeffectinfruitbranchleaves,buttheleafsenescencewasacceleratedbycuttinglea
8、vesatlategrowthstage.Alteredtheratioofsource/sinkalsoaffectedtheSODandPODactivitie
