紅砂的解剖結(jié)構(gòu)及生理生態(tài)特征對干旱環(huán)境的響應.pdf

1、甘肅農(nóng)業(yè)大學碩士學位論文紅砂的解剖結(jié)構(gòu)及生理生態(tài)特征對干旱環(huán)境的響應姓名：白琰申請學位級別：碩士專業(yè)：草業(yè)科學指導教師：龍瑞軍王剛20050601摘要ji肅農(nóng)業(yè)大學頓j：論艾關(guān)鍵詞紅砂；生態(tài)解剖：干旱脅迫：生理指標；生理生態(tài)SummaryToconfirmtheanatomizestructureofReaumuriasoongoricaanditsphysiology—ecologycharactersadapttothedrough

2、tcondition：①ThedissectionofstemsandleavesofReaumuriasoongorica②Thecontentofproline，MDAandChlorophyllofReaumuriasoongoricaunderdroughtwasmensurated③TheLI一6400(LICOR，IncLincoln，NE，USA)portablephotosynthesissystemwasusedtom

3、ensuratethePn，E，GsandPARofReaurnuriasoongoricagrowinthefield④TheHansatechFlurescenceMonitoringSystem(FMS一2，Hansatech，UK)wasusedtomeasuretheFv／Fm，F(xiàn)o，OPSII，qP，qNandKDofReaumuriasoongoricaResultsasfollows：①Observingslicesof

4、stemsandleavesofReaumuriasoongoricaundermi。croscope，thestructureofxerophytewereobservedThestemsandleavesofReaumuriasoongoricahavepeculiarstructuretesistdamageformdoughtReaumuriasoongoricahavethetypicalcharactersofxerophy

5、testhatletReaumuriasoongoricahavetheabilityofdrought—resist③Thecontentofprolineincreasesalways，thecontentofMDAdoesnotincreaseconstantlybutthetrendisincreases，thecontentofchlorophyl／increasesatfirstandthendecreasesUnderdr

6、oughtstressReaumuriasoongoricacouldaccumulatesolutesuchasprolineteducethedamagesgetfromdrought③ThePn，EandGsofReaumuriasoongoricawerehigherinthemorningandafternoonthaninthenoonThedecreaseofstomatalconductanceletReaumuri口s