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1、中国水稻科学(ChinJRiceSci),２０１６,３０(２):１６１－１６９http://www．ricesci．cnDOI:１０．１６８１９/j．１００１Ｇ７２１６．２０１６．５１３７１６１水稻器官形态和干物质积累对穗分化不同时期高温的响应王亚梁＃张玉屏＃朱德峰∗向镜陈惠哲张义凯(中国水稻研究所水稻生物学国家重点实验室,杭州３１０００６;＃共同第一作者;∗通讯联系人,EＧmail:cnrice＠qq．com)ResponseofRiceOrganMorphologyandDryMatterAccumulationtoHighTemperatureatD
2、ifferentPanicleInitiationStagesWANGYaＧliang＃,ZHANGYuＧping＃,ZHUDeＧfeng∗,XIANGJing,CHENHuiＧzhe,ZHANGYiＧkai(StateKeyLaboratoryofRiceBiology,ChinaNationalRiceResearchInstitute,Hangzhou３１０００６,China;＃Theauthorscontributedequallytothiswork;∗Correspondingauthor,EＧmail:cnrice＠qqc．om)WANGYa
3、liang,ZHANGYuping,ZHUDefeng,etal．Responseofriceorganmorphologyanddrymatteraccumulationtohightemperatureatdifferentpanicleinitiationstages．ChinJRiceSci,２０１６,３０(２):１６１Ｇ１６９．Abstract:ApotexperimentincontrolledＧenvironmentchamberswasconductedtodeterminetheeffectsofhightemperature(４０℃)o
4、nthericeorganmorphologyanddrymatteraccumulationduringpanicleinitiationstage．TwomidＧindicaricecultivars(Huanghuazhan,heatＧtolerant;Fengliangyou６,heatＧsensitive)wereplantedandexposedtohightemperature(４０℃,１０:００－１５:００),andnormaltemperature(３２℃,１０:００－１５:００)duringbranchＧspikeletdifferen
5、tiationstage(I)andpollenmothercellformationＧmeiosisstage(Ⅱ),meanwhilericewasgrowninambientconditionsasCK．Theresultsindicatedthat,１)atstageIhightemperatureinhibitedpanicleinitiation,extendingthepanicleinitiationstageby２．５－８．８d,whileatstageⅡ,by６．８－７．１d,whichshortenedthelengthoftheto
6、pinternodeandreducedtheheadingdegree,especiallyinFengliangyou６．２)Heatstressatpanicleinitiationstagesignificantlydecreasedthenumberandthesizeofspikelets,whichmightbeduetothesignificantdifferenceintreatmentperiod．HightemperatureatstageIinhibitedspikeletdifferentiation,whileatstageⅡ,
7、heatstressmainlypromotedspikeletdegeneration,thedegenerationrateofthetwocultivarswereupto５０％,with‘Fengliangyou６’havingahigherratio．HightemperatureexposureatstageⅡalsosignificantlydeclinedthesizeofanther,andthespikeletfertility．３)Hightemperaturepromotedthegrowthofthetopthreeleaves,
8、especiallyatstageⅡ．Heatstressatth
