箣竹属和牡竹属(竹亚科)叶表皮微形态特征

Micromorphological Study on Leaf Epidermis of Bambusa and Dendrocalamus (Poaceae:Bambusoideae)

利用光学显微镜和扫描电镜,对箣竹属21个种(包括箣竹亚属5个种、孝顺竹亚属2种、单竹亚属4种、绿竹亚属9种和亚属未定1种)以及牡竹属5种叶表皮微形态特征进行了观察和研究。所得结果表明气孔保卫细胞上乳突的数目和分布存在一定的规律,并具有一定的分类价值。绿竹亚属的叶表皮微形态特征界于箣竹属和牡竹属之间,但更接近于箣竹属。因此认为在分类处理上,将绿竹亚属置于箣竹属比单独成立绿竹属更为合理。

Micromorphologicalcharacteristicsof leafepidermisof26speciesof bamboos(Bambusa subgen.Dendrocalamopsis,9species;subgen.Bambusa,5species;subgen.Leleba,2species;subgen.Lingnania,4species;subgenusuncertain,1species;Dendrocalamus,5species)wereobservedunder SEMandLM.Theresultsshowedthatthenumberanddistributionof papillaeinsubsidiarycellsof the stomataexistedto some extentregularpatternswhichcouldbe appliedin the bambootaxonomy.Micromorphologicalcharactersof leafepiderimisindicatethatBambusa subgen.Dendrocalamopsis is intermediatebetweengeneraBambusa andDendrocalamus,showingsimilaritiesto bothof them,butis closerto genusBambusa.So itis morereasonableto treatDendrocalamopsis as a subgenusof Bambusa thanas a separategenus.