烤煙品種云煙85煙葉成熟度的研究.pdf

1、福建農(nóng)林大學(xué)碩士學(xué)位論文烤煙品種云煙85煙葉成熟度的研究姓名：王峰吉申請學(xué)位級別：碩士專業(yè)：作物栽培與耕作學(xué)指導(dǎo)教師：江豪2001.5.1烤煙品種云煙85成熟度的研究MDTheslsStudiesonleafmaturityofavarietyofflue—curedtobaccoYunyan85AbstractStudiesweremadeonleafmaturityofavarietyoffluecuredtobaccoYunyan

2、85byobservingfieldgrowthdaysofYunyan85andK326neededtodifferentmaturitydissectingleafatdifferentmaturitytestingchangesofchlorophyllachlorophyllb，carotenoidcomemdeteminingchangesofactivitiesofsuperoxidedismutase(SOD)，perox

3、id筍e(POD)，catalase(CAT)，measuringchangesofmolonaldehyde(MDA)contentandrelativepermeabilityofcellmembraneduringthematurationoftobaccoleaves，andbygradingcuredleavesofdifferentmaturityTheresultsshowedthattheactivitiesofSOD，

4、POD，CATdecreasedwhileMDAcontentandrelativepermeabilityofcellmembraneincreasedwiththeincreasingofmaturityThisresultedintheaccumulationoftheactiveoxygens，whichinturnnotonlyincreasedthelipidperoxidationoftheplasmamembranean

5、dpromotedtheaccumulationofMDA，butalsoacceleratedthedestructionoftheplasmamembranethatcausedtheincreaseoftherelativepermeabilityoftheplasmamembraneItinducedthattheleavesandtheclearanceofcellsthinningdowntheSIDIcturasoflea

6、ftissuelooseningandthetomentasofepidermicfallingoffWiththeincreasingofmaturity，thechlorophyllcomemdecreasedrapidlywhilethecarotenoidcontentdecreasedslowlySOtheratioofthechlorophyllcontentandthecarotenoidcontentbecamebigg