兩種砧用南瓜及其黃瓜嫁接苗耐鹽性的比較研究.pdf

1、河北農(nóng)業(yè)大學(xué)碩士學(xué)位論文兩種砧用南瓜及其黃瓜嫁接苗耐鹽性的比較研究姓名：王冉申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：蔬菜學(xué)指導(dǎo)教師：陳貴林20050619StudiesonSalttoleranceofTwoPumpkinCultivarsasRootstockandCucumberSeedlingsGraftedonThemAuthorSupervisorMajorStudyfieldWangRanChenGuilinVegetableVegetab

2、leSoillessCultureAbstractCucumberissensitivetosaltSoilsalinitydeterioratesseverelythegrowthandyieldofcucumberGraftingculturecaneffectivelyenhancetheabilityofcucumbertoresistadversityandhasbeenappliedwidelyItissignificant

3、tocomparesalttoleranceofdifferentrootstocksandstudythemechanismofsalttoleranceofgraftingcucumbecSalttoleranceandcharacteristicsoftwopumpkincultivars(CucurbitaficifoliaBoucheandCucurbitamoschataDuchexPoir)，usuallyusedasro

4、otstocksofcucumberandcucumber0inyouNo31seedlingsgraftedonthemunderNaClstresswerestudiedmainlyinosmoticadjustmentandionbalanceinordertoinvestigatesalinitytoleranceofdifferentrootstocksandoffersomereferenceforthegraftingcu

5、ltureofcucumberinpractice1Twopumpkinvarieties(Cucurbita—c和liaandCucurbitamoschata)weretreatedwithdifferentconcentrationsofNaCl(120，180，240mmol／L)，andcomparedthesalttoleranceinphraseofseedgerminationTheresultsindicatedtha

6、tCucurbitamoschatahasstrongersalt—tolerancethanCucurbitapcifoliainphraseofseedgerminationunderNaCIstress，withhighergerminationpotential，germinationrate，germinationindex，activityindexandrootactivityandlowersaltinjuryindex

7、andleakageofradicleinCucurbitamoschatathanthoseinCucurbitaticf，o“口2Salttoleranceofpumpkincultivars(Cucurbita鼻cifoliaandCucubitamoschata)underdifferentconcentrationNaCIstresswasstudiedTheresultsshowedthatinbotIlcultivarst

8、reatedwith150，300and500mmol／LNaCIfor7days，Nasalinityresultedinthedeteriorationofgrowthofshootandroot，thedecreaseofshootrelativewatercontent，andtheincreaseofMDAcontentandcellmembranepermeabilityWithincreaseofNaClconcentra

9、tion，NacontentincreasedwhileKcontentdecreaseddistinctlyinroots，stemsandleavesofbothcultivarsAndNaandKcontentsindifferentorganswereinorders：rootsstemsleavesandstemslovesrootsTherewerelessNainroot，stemandleafmorefreeprolin

10、eandsolublesugarinleaves，andhighershootrelativewatercontentinCucurbitaticf，DliathaninCucubitamoschataSotherearedifferencesbetweenCucurbita加f，DliaandCucubitamoschatainosmoticadjustmentmechanismsandthecapacityofionicselect