大氣CO-,2-濃度升高對于水稻光合作用及同化物分配的影響.pdf

1、山東大學碩士學位論文大氣CO濃度升高對于水稻光合作用及同化物分配的影響姓名：劉磊申請學位級別：碩士專業(yè)：生態(tài)學指導教師：王仁卿2000.5.1EffectsofelevatedC02onPhotosynthesisandcarbonallocationinriceAbstractAtmosphericC02concetrationisincreasingItispredictedthatbythemiddleofnextcentury，

2、C02conccn廿afionwillreach700pmolmol～EnrichedatmosphericC02couldinfluenceagricultralprducfiondirectlyRiceisoneofthemaincropsinAsiaC02enhancementmaychangericeplantdevelopingbychangingphotosynthesisSOastOaffectriceproduction

3、TheobjectiveofthestudywastotestphotosyntheticresponsesofriceplantunderelevatedC02concentrationthroughstudyingonchangesofphotosynthesisandphotosynthatesallocationpattemTherewerethreetreatmentsintheexperiments，whichwereamb

4、ientC02inopentopfieldchamber，ambientplus300tmaolmollC02inchamberandambientC02withoutchamberDuringthisstudy，rice(Jindao1187、plantsweregrowninthechambersandoutsidefieldfromtransplantingtomaturityItwasfoundthatsingleleafpho

5、tosynthesisWasstimulatedbyIlighC02duringearlygrowingstageCarbohydrates(solublesugarandstarch)wereaccumulatedintheleavesunderhighC02RubiscoactivityofriceleavesgrownunderelevatedC02decreasedaccompaniedbydecreasesinleafsolu

6、bleproteinandnitrogencontentsCarbohydrates(solublesugarandstarch)wereaccumulatedintheleavesunderhighC02MorecarbohydratesweretransportedtotherootsRoot／shootratioWasincreasedunderelevatedC02PhosphoruscontentofriceplantWasn

7、otchangedobviouslyRicegrowingdaysunderhighc02WasshortenedYieldcomponentswerestudiedandfoundthatgrainyieldWasincreasedunderhJ【ghC02GrowthofriceplantWasenhancedduringthevegetativestageYieldcomponentsweredecreasedunderhighc