甜椒耐熱機理及熱脅迫下生理、生化變化的研究.pdf

1、福建農業(yè)大學碩士學位論文甜椒耐熱機理及熱脅迫下生理、生化變化的研究姓名：徐劍鋒申請學位級別：碩士專業(yè)：蔬菜學指導教師：黃碧琦2003.4.1話正基林土幸碩士雪位論丘：神椒耐甚機理矗甚艫(童下生理、生侶t億秭研盤TheStudyOilHeatResistanceMechanismandonthephysiologicalandbiochemicalChangesunderhightemperaturestressinSweetPepper

2、AbstractAstudyontheeffectsofheatstressesinsweetpepperwasconductedinagrowthchamberThechangesofsomephysiologicalandbiochemicalitemsintheleavesofcultivarsofsweetpepper(heat—resistantBeiJingHaiHun3Hao，lessheat—resistantNanJi

3、ng52andheatsensitiveBaiLi300)afterheatstresswasstudiedforthesearchofphysiologicalfoundationTheresultshowed：1Underhightemperaturestress，seedvigorofsweetpepperwasbothdecreasedHoweverthedecreasingrateofheat—resistantcultiva

4、rswerelessthanthatofheatsensitiveonesThus，thereisapossibilityofusingthechangesinseedvigorastheindicatorsofassessingtheheatresistanceofvariouscultivarsinsweetPepper2Thewatercontentwasbothdecreasedandtranspirationwasincrea

5、sedinsweetpepperButtheleafcellsinheat—resistantcultivarsheldmorewatercontentandboundwaterwithhigherstomataldensityfastertranspirationratethaninheat—sensitiveonesThechangesofthephysiologicalindexesinlessheatresistantsweet

6、pepperwereatintermediatelevelsascomparedwiththoseoftheothertwocuttivars3Underhightemperaturestress，thegrowthwasinhibitedseverelyrootactivityandChlorophyllcontentweredecreased，respirationoftheleafwasenhanced，thendecreased

7、Thechangesinheatresistantwerenotobvious4Themembranedamageextent，MDAcontentandthechangeofpralineofthesweetpepperleavesunderhightemperaturestressweresuggestedastheindicatorsofassessingtheheatresistanceofvariouscultivarsins