黃花苜蓿幼苗抗旱性及遺傳多樣性研究.pdf

1、學校代碼；10200分類號：Q948研究生學號密級東北嶧葒大孽碩士學位論文1247203103尤Y887679黃花苜蓿幼苗抗旱性及遺傳多樣性研究Droughtstressandgeneticdiversi夠ofseedlingsof脅商配朗曙D‘，鈕跆口Z缸作者：王赫指導教師學科專業(yè)研究方向?qū)W位類型周道瑋教授生態(tài)學植物分子生態(tài)學學歷碩士東北師范大學學位評定委員會2006年5月AbstractInthisp印er，basingonthem

2、o叩hologicalcharacteristics，physiologicalecologya11dmolecularbiology，dia’erentgenotype脅破c口堙口扣肥d，脅whjchareperennjalleg刪nousplalltsweresmdiedonthemoIphologicaltra“s，mesn鉦e百esofdifIbrentgenotypeseedlingsunderdmughts仃essandth

3、egeneticdiversity111eresultsshowedthat：(1)拖d婦忉如七口加hadrelativesmall1eafareaItsstemwasdecumbema11dformed10tifomcoⅢo訂nationItsseedlmgsgrewveryslow，buthadstrongrootsalldalotofrootnodulesItsaccumulationofbiomassandspeedof伊owm

4、werelowertllallthatof肘魯威cqgDVdrf口IntegfatiVeconsid甜ngthemorphologicalcharacters，罌Dwingspeed趿daccumulationofbiomass，CVCuluskaya，LYakuskayayellow’andXiMengshowedmoreelegamqualitytllaIlotllers，anddeserved劬herstudy(2)111thee

5、xperimemofdmughts仃esson尬西c凹D向，cd婦seedlings，theheldthestI℃ssinteⅡsi哆by、veight趾ddroughtrewaterThedroughtstresscarriedoutonthefourweek—oldseedlingsTheresultwast11at，menetphotoSyntllesisrate，訂anSpiralionrate，stomaconductallc

6、ea11dinsta】mmeouswaterusee伍ciencyofalltheseedlillgsdecreasedButdroughts仃essdidnota＆ctthephotosanlrationofcvDaviluya，cvculuskaya，Ⅵ血ichwas600Ⅲnol／m2sBycontraries，t|1ephotosaturationofGongNongIandXiMengdecreased2／3a11d1／3re

7、spectiVelyTheeffectofdrou曲tonthemorphologicalcharactersof^如旃c昭。丘fc甜mseedlingsshowedthesametIend，whichwasthatheight，rootlengtll，r鋤弧cation，motcollardi眥eterandleafareaweredecreased，butrelativeleafareai11creasedUnder蛐ss，ther

8、ootlengtll／he遠htincreased，fumlcⅡnoreme灑creasesofCv‘DaviluyaaIldCvCuluskayaweresignificamDroughtstressdidnotonlymakemedecreaseofbiomassaccumulation，butalsoaf詫ctedtlledis伍butionofproductofassimilationRoot／shootofCVDaviluya

9、，CVCuluskayaa11dxiMengundermoderacestresswas11i曲erthallt11eblack，butlowert11anmatunderseveres訂essThero州shootofGongNongIdecreasedasthestressbecomingseVerer，butit、vasnotsignific趾tThestem／1eafincreasedthoughunders廿ess，In廿1e

10、circumstanceoft11isstudy，CvDaViluyaa11dCvCuluskayacould口owrelativelywelluIldcrmoderatestress，aJldcouldcompleteIlo肌alphysiological脅ionsTherefore，theyhads廿ongerdrou曲tresistancemanotllergenot)，pesIn廿leopposite，GongNong1wass

11、ensitiVet0droughtstress，andwasinjuredverybadlyeveninmemoderatestressInthedrought—rewateredexperiment，CvDaviluya’CⅥCuluskayaa11dXiMen昌threematerialof脅擊cqgo如如口脅，showedcorrespondingstrategieschangesinmorph0109yandbiomassacc