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ID:33012200
大小:2.91 MB
页数:48页
时间:2019-02-19
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1、Peranemaceae.1.LeafepidermisBycomprationwimthreeaspectsofthefeaturesofupepidermal、stomatalstyles、thestomataldensity.InPeranemaceaeandNothoperanema(Tagawa)Ching,thepatternofanticlinalwallsoftheupepidermalismostlyirregularconcaveconvexorsinuolate,themostofcell’Sshapeislong,themainstyleof
2、stomataliscoaxillocyticoraxillocytic,polocyticandcopolicyticarelesser,bothPeranemaceaeandNothoperanema(Tagawa)Chinghaveasmallquantityofanomoteracyticandanomocytic.Besidesthese,pericyticappearinPeranemaceae,desmocyticappearinNothoperanema(Tagawa)ChingThestomataldensityofPeranemaceaeis4.
3、1-12.2pieces/mm2,Nothoperanema(Tagawa)Chingis8.5—14.8pieces/mm2.ThepatternofanticlinalwallsofupepidermalofLithostegiaChingisvertical,theshapeofthecellislong,Anomoteracyticandbrachyparacyticaremainpatternofthestylesofstomatal,thestomataldensityis4.7pieces/mmz.ThefeaturesofupepidermalofP
4、eranemaceaeareclosetotheNothoperanema(Tagawa)Ching,2.TraehearyelementsTrachearyelementsof10speciesofPeranemaceaeand3speciesofNothoperanema(Tagawa)Chingand1speciesofLithostegiaChingfromChinawereexaminedbyscanningelectronmicroscopy(SEM).Theresultsindicatethattheendwallshavethesamemorphol
5、ogicalcharacteristicsandstructureasthelateralwalls.Thelateralwallshaveperforationplates.Thetrachearyelementscouldalsobedividedinto4types:(1)scalariformwithoutdimorphicwidthperforation;(2)scalariformwithperforationpitdimorphism;(3)reticulate—scalariformplates;(4)coarse—poredperforationp
6、lates.Accordingtotheextentofremnantsofpitmembrane,Nothoperanema(Tagawa)ChingisclosetothePeranemaceaehardly,bothofthemhave3styles:someregionhaveintactpitmembrane,weblikeorthreadlike,alittleorwithout.ThefeaturesoftrachearyelementsindicatethatPeranemaceaeandNothoperanema(Tagawa)Chinghavec
7、loseconnection.TheLithostegiaChingwasconsideredasamemberofPeranemaceaeforalongtime,accordingtotheresearch,wefoundthatithasthetypicalscalariformperforationplates,noassociatedorcrossedphenomena,andsomeregionhaveintactplate,nodimorphicVphenomena,noweblikeorthreadlikeremnants,thesesugges
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