三倍體毛白楊生物結(jié)構(gòu)及木素微區(qū)分布的研究.pdf

1、學(xué)位授f單位代碼：1043l研究生學(xué)日：10431990110山孽經(jīng)互業(yè)虧院碩士學(xué)位論文三倍體毛白楊生物結(jié)構(gòu)及木素微區(qū)分布的研究院(系)別：輕化與環(huán)境工程學(xué)院專(zhuān)業(yè)：制漿造紙工程研究生：許鳳指導(dǎo)教師：陳嘉川教授二00二年三月山東輕丁業(yè)學(xué)院碩士論文BiologyStructureandLigninDistributioninCellWaoftheTriploidofPopulusTomentosaXufengChenjiachuan(Sha

2、ndongInstituteofLightIndustry，Jinan，250100)ABSTRACT：7YimbercharacteristicswhichincludechemicalconstituentsandfibermorphologyandbrightnessofwoodpowderwereanalysedinthispaperThroughchemicalanalysisofgroundwood，itwasknownth

3、atcellulosecontentiScommonlyover47％butlignincontentiSabout17to2l％ThecontentofchemicaIconstimentsiSlittledifferentfromthatofeachpartofthewoodFibermorphologyisalsodifferentFiberaveragelengthis097mm，widthiSfrom20to24lam、len

4、gth／widthiS44、butRunkelratioiSabout06FromtheresultswecanknowthatIengthwidthratioandRunkeIratioofmiddletrunkaresuperiortothatoftheotherpartoftrunkBrightnessofwoodpowderiShigherover50％IS0Wbodultrastructureandlignindistribu

5、tionineellwallweremainlystudiedbyscanningelectronmicroscopyandtransmissionelectronmicroscopyandtheiraccessorytoolsandtechniquesFirstlytheresultsindicatedthatwoodanatomyandultrastructureoftriploidofpopulustomentosajssimil

6、artotheothercommonhardwoodsCellwalliScomposedofMP，S1，S2，andS3layers1meSilayerofthesecondaryeellisthinnerandS2layeriSthickerHoweverS3layerisquietthinnerneverSOmuchasdistinctSecondl％themicrographsillustratedthedifferencesi

7、norientationofthemicrofibrilsintheS2andS3layersoftheplantcellMirofibrillarorganizationof廿levariouswalllayerswasalseposedinthispaperTheprimarywallcontainsarandomlyandlooselyorganizednetworkofcellulosemirofibrils。TheSllaye

8、rofthesecondarywallhascross。hatchpatternofmicrofibrilswhoseanglesisabout50600ButintheS2layerofthesecondrywalltheorientationofthemicrofibrilsiSaboutl5300almostparallellingtothefiberaxisInthethinS3layegthemicrofibrilsforl2