3種莎草科植物葉片形態(tài)解剖學及發(fā)育過程中細胞程序性死亡現(xiàn)象.pdf

1、甘肅農業(yè)大學碩士學位論文3種莎草科植物葉片形態(tài)解剖學及發(fā)育過程中細胞程序性死亡現(xiàn)象姓名：郭敏申請學位級別：碩士專業(yè)：草業(yè)科學指導教師：強科斌龍瑞軍20060601SummaryThispaperstudiedonthedevelopmentalandmorphologicalanatomystructureandtheprogrammedcelldeathofleavesofCarexatrofusca，Carexorbicularis

2、andBlysmussinocompressusbyusinglightandelectronmicroscopeTheresultsasfollows：1Inthetransversesection，themorphologicalanatomystructureofleavesofCarexatrofusca，CarexorbicularisandBlysmussinocompressuswasevidentlycomposedof

3、epidermis，veins，mesophylltissueandventilatingstructureThebladesofCarexatrofuscaandCarexorbiculariswereVshapedandthatofBlysmussinocompressuswascrescentiform2ThecellswallsofbothepidermalcellsofthreeplantsshowedsinuateThesi

4、zesofupperepidermalcellswerebiggerthanthatoflowerepidermisThebulliformcellsweresituatedingrooveofupperepidermisfacingthemainveinThestomatalapparatuseswereallhemiparacytictypesThereweresiliceouspapillaeontheallabovelowere

5、pidermalcellsofCarexatrofuscaandCarexorbicularis，whichwasleaningtowardthesamedirectionintheCarexorbicularis，whilebothepidermalcellsofBlysmussinocompressushadnooneThestomatalapparatusesofCarexorbicularisweredistributedonb

6、othepidermalcells，whiletoBlysmussinocompressusandCarexatrofusca，whichwereonlyonthelowerepidermalcells3。ThemesophyllcellsofCarexatrofusca，Carexorbicularis，andBlysmussinocompressushadnodifferentiationsbetweenpalisadetissue

7、andspongytissueThemesophyllcellscontainedidoblastThevascularbundlesheathconsistedoftwolayersofcells：theouterlayerwasbiggerparenchymacells，andtheinnerlayerwascomposedofminorsclerenchymacellsThemodelofthecellwallwasU‘shape

8、dincrassationinthetransversesectionThemechanicaltissuewasflakilysituatedintheupsideanddownsideofmostlyvascularbundlesTherewasanair。cavityamongtheneighboringvascularbundlesformingwelldevelopedventilatingstructureinthematu