水分脅迫對(duì)小麥碳同化物分配及穗部顯微結(jié)構(gòu)的影響.pdf

1、Y1133277分類號(hào)：Q絲5：!!UDC：81密級(jí)：公玨堡學(xué)校代碼：10712研究生學(xué)號(hào)：SY20040113西北農(nóng)林耕捉大學(xué)2007屆攻讀碩士學(xué)位研究生學(xué)位(畢業(yè))論文水分脅迫對(duì)小麥碳同化物分配及穗部顯微結(jié)構(gòu)的影響學(xué)科專業(yè)植物堂研究生奎威蘊(yùn)完成時(shí)間2QQ2生5旦中國(guó)陜西楊凌EFFECToFⅥ硝LTERSTRESSoNDISTRJBUTIONoFCARBoNASSIMILATIoNANDMICRoSTRUCTUREoFEARSINWH

2、EATABSTRACTWateristhelimitedfactorofthegrowthofwheatinthenorthofChinaEffectofdroughtonwheatindifferentgrowthstageswasobvious，whichreducedtheyieldofwheatseriouslyInthisstudaypotexperimentswerecarriedouttolearnthecontribut

3、ionofdifferentorganstograinweightthroughthetreatmentsofdefoliate，darkenearanddarkenstemandthemicrostructureofrachisindifferentgenotypewheatunderwaterstressWealsodeterminatedtheactivityoftheprotectiveenzymesandsucrosephos

4、phatesynthase(SPS)andthephotosynthesischaracteristicsMainresultsinthisstudyarelistedasfollows：1ThereweresignificantdifferencesamongdifferentorgansinthecontributiontothepereargrainweightComparedwithnormalwatertreatment，th

5、econtributionofleafandeartothepereargrainweightwereincreasedtraderwaterdeficit，butdecreasedinthestemsheathanditsreservedsubstance2ChangesofSPSofflagleafinanthesisstageweredifferentfromthatinfillingstagewhichunderdifferen

6、tWatertreatments功eSPSincreasedunder曲emoderatewaterdeficit，whileitdecreasedundertheseverewaterdificitinanthesisstageWiththelevelofthewaterstressincreasing，theSPSofflagleafdecreasedinthefillingstageIntheheadingstage，anthes

7、isstageandinthefillingstage，thePn、GsandTrdecreasedwiththelevelofthewaterstressincreasingTheSPSofflagleafinfillingstagewaspositivelycorrelatedwiththePn3Thenumberandtheareaofmacro—vascularbundleandsmallvascularbundleofrach

8、isandthediameterofvesselandtheareaofphloemdecreasedfrombasetotop，butthedecreasedratedifferedwiththechangeofthekindofvascularbundleandpositionofrachisComparedwithnormalwatertreatment，thenumberandtheareaofmacro—vascularbun

9、dleandsmall—vascularbundleofrachisandthediameterofvesselandtheareaofphloemdecreasedundermoderatewaterdeficit，whileitdecreasedobviouslyundertheseverewaterdeficitItshowedthatthevascularbundlesystemofrachisinwheatchangedapp