中国竹亚科巨竹属的解剖研究与分类整理

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1、ourcountrybythemeal岱ofanatomymethod．Accordingtothefieldinvestigation,identificationandexperimentalresults，wehaveputemphsismainlyonsomeproblemsasfollows：(1)Originally,7specieswererecordedinChina,now12speciesarearrangeddiscoveredincluding1newly-distributedspecie

2、s，GscortechiniiGamble，1newly-publishedspecies，GmenglunensisB．Wen,1new8penes，Glaosensis．TheygrowinMenghai，MenlLaofXishuangbannainChina,inwhich2ofthemarealienspeci鹤：GatroviolaceaWidjajaandGapusKurzexMunro，whicharealsoplantedinGuangzhouofGuangdongprovince(2)After

3、reviewinglargeamountsofdata,wefoundthatthegenusGigantochloaonlydistributesinYmmanofChina,mainlyintheXishuangbannaofYunnan．AccordingtoDielsandothers’principleofdivisionoftheworld’Splant，thegenusGigantochloabelongstotheancienttropicalbamboozone，whichincludesfrom

4、thesouthofYangtzeRivertotheSouthAsia,SoutheastAsia,andmuchofAfrica．(3)Accordingtotheresultofobservationonthe9kindsofculmanatomicalstructures，itindicatesthatthetypicalvascularbundleofGigantochloaisdoublebroken—waistorbroken-waist．Inthecapillarysystem，vascularbu

5、ndlepresentscertaindirectivearrangementrule，named“Phloemisinside，Xylemisoutside”．Itissaidthatphloemfacesthebamboowalloutside，butxylemislocatedonbamboowallinside．LookingattheentireCROSSsection,wecanfindthattheductsneartheoutsideofbamboowallaresmaller,theybecome

6、biggerinthemiddle，thebiggestareinside．Thefiberhatinsidetendstobecomeshorter，whilethesidefiberhatbecomessmaller．Theparenchymacellstratumsofthemarrowlinkofthebasearefewerthanthoseinthemiddleoftheculms，expectGnigrociliata．(4)Accordingtotheanatomicalcharacteristic

7、softhe9kindsofthegenus，therearethreekindsofmesophyUcellsintheleaf：arm-cells谢廿ltigerformedfolds，irregularcellsandradicalcells．Andtherearelargefusoidcellsinthebothsidesofthevascularbundle．SotheanatomicalcharacteristicsofthegenusGigantochloaleafistheprimitivetype

8、intheevolution．(5)WhenthebamboosofthegenusGigantochloasendtheirshoots，theyneedtheconditionsasfollows：achangeofthenumberofhoursofsunshineandayieldradiation，theaveragetemperaturebetw