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1、中国水稻科学(ChinJRiceSci),２０１６,３０(５):５２５－５３１http://www．ricesci．cnDOI:１０．１６８１９/j．１００１Ｇ７２１６．２０１６．５１８３５２５淹涝条件下水温对水稻幼苗形态和生理的影响向镜陈惠哲张玉屏张义凯朱德峰∗(中国水稻研究所水稻生物学国家重点实验室,杭州３１０００６;∗通讯联系人,EＧmail:cnrice＠qq．com)MorphologicalandPhysiologicalResponsesofRiceSeedlingstoWaterTemperＧature
2、UnderCompleteSubmergenceXIANGJing,CHENHuiＧzhe,ZHANGYuＧping,ZHANGYiＧkai,ZHUDeＧfeng∗(StateKeyLaboratoryofRiceBiology,ChinaNationalRiceResearchInstitute,Hangzhou３１０００６,China;∗Correspondingauthor,EＧmail:cnrice＠qqc．om)XIANGJing,CHENHuizhe,ZHANGYuping,etal．Morphologic
3、alandphysiologicalresponsesofriceseedlingstowatertemperatureundercompletesubmergence．ChinJRiceSci,２０１６,３０(５):５２５Ｇ５３１．Abstract:Torevealtheeffectsoffloodwatertemperatureonmorphologyandphysiologyofriceseedlings,ricegenotypeswithdifferentsubmergencetolerancewereused
4、:IR６４Sub１(tolerant),IR４２(sensitive),Gangyou７２５andTaiyou３９８(maincultivar)．SeedlingsweresubmergedtwentyＧfivedaysaftersowingattwowatertemperaturefor０,３,６,９and１２days．Theresultsshowedthattheoxygenconcentrationinthe２０℃floodwaterwashigherthanthatin３０℃floodwater,theoxyg
5、enconcentrationdecreaseddrasticallyin３０℃floodwaterthan２０℃floodwaterwithincreasingsubmergencedays．Theshootelongationpercentagewashigherwhenseedlingsweresubmergedin３０℃floodwaterthan２０℃floodwatercondition．ThesameresponsewasfoundinthetolerantvarietyIR６４Sub１,butthesh
6、ootelongationpercentagewasthelowestamongfourvarieties．ThedifferenceinshootelongationofIR４２betweentwofloodwatertemperaturewasbiggestafter９Ｇdayand１２Ｇdaysubmergence．NonＧstructuralcarbohydrateconcentrationsandleafSPADvaluewerelowerunder３０℃floodwatertemperaturethan２０
7、℃temperaturefloodwatercondition．Thisfindingshelptounderstandthecauseofhighsurvivalofricesubmergedinlowtemperaturefloodwater．Keywords:flooding;watertemperature;sugarconcentration;starchconcentration;survivalpercentage向镜,陈惠哲,张玉屏,等．淹涝条件下水温对水稻幼苗形态和生理的影响．中国水稻科学,２０１６,
8、３０(５):５２５Ｇ５３１．摘要:为了研究淹涝水温对具有不同耐淹能力水稻材料形态和生理的影响,明确淹涝水温对水稻幼苗耐涝能力影响的机理,采用盆栽试验,选取导入耐淹基因的耐淹品种IR６４Sub１和淹水敏感品种IR４２以及耐淹能力较强的品种冈优７２５和泰优３９８,设计２０℃和３０℃两种水温进行淹水处理,淹水时间分为０,３,６,９和１２
