不同生育时期低温胁迫下寒地粳稻淀粉积累规律的研究

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1、东北农业大学农学硕士学位论文ResearchonstarchaccumulationruleindifferentgrowthSageo工1aponlcarlceinc011：1reglon，’●●'●AbstractHeilongjiangProvinceisoneoftheimportantcommoditygrainproducingarea，isalsoallimportantcommoditygrainproductionbaseinChina．RiceproductioncanmeetChin

2、a’Sjaponicaricemarket，andtheworldjaponicaricemarketdemandandhavestrategicimportance．HoweverthenortheastofchinaisahighriskregionoflowtemperaturedamageandHeilongjiangProvinceasallmainplantingareafornorthjaponicariceincoldrigion，lowtemperatureharmingriceyeli

3、dandqualityseriously．Inthisthesis，Tengxi138，WuyoudaoNo．1，Dongnong423，Dongnong425，Dongnong427andSongjing6wasusedasexperimentalmaterial，anduselowtemperturewaterstressintilleringstage，bootingstageandfillingstageofricegrownkeyperiod．studythefunctionalleafchlo

4、rophyllcontent，tillerdynamicandyeildofrice．Clearanddefinitethechangeruleofstarchandstarchcomponentsaccumulatingregularity，microstructureofstarchandpastetraitsofstarch．announcetheregulationeffectofADPGpyrophosphorylaseandstarchbranchingenzymeforstarch．Prov

5、idetheoreticalbasisfortheresearchoncold．toleranceofriceinHeilongjiangProvince．Themainconclusionsofthisexperimentareasfollows：1．Chillingstressdelaythehappeningoftillers，declinethetillering-Increase-rate，tillering-decrement-rateandthenumberofproductiveear,i

6、ncreaseproductivetillerpercentage．Dongnong423isthemostsensitivetochillingstress．AndtheDongnong425isthemostinsensitivetochillingstress．2．TheperformanceofChlorophyllcontentindifferentgrowthperiodwithlowtemperaturestressisdifferent：thecontenttrendingdownward

7、safterchillingstressattilleringstage，andatbootingstagethedownwardtrendwasmoresignificantaRerchillingstress．ThecontentofChlorophyllinfillingstageislowerspeedisfasterafterchillingstress．TheperformanceofChlorophyllcontentindifferentgrowthperiodafterlowtemper

8、aturestressisdifferent：whenchillingstressWasrelievedattilleringstage，thecontentrecoveredquickly．AndatbootingstagethecontentWasSlowlyrising．Atfillingstagethecontentsustaineddownwardtrend．Differentvarietiesunderchilli