中国紫金牛属圆齿组果实微形态特征研究

Fruit Micro-morphological Features of Ardisia Sect.Crispardisia (Myrsinaceae) from China

对国产紫金牛科紫金牛属圆齿组(Ardisia Sect. Crispardisia)16种植物的果实表面进行了扫描电镜观察。经观察果实为球形,表面多无毛,稀有柔毛。多数种具腺点,极少数无腺点或不明显,腺点疣状、粒状或横棒状,腺点常与果实表面突起具对应关系。果实表面纹饰大致可分为3种:基本平滑、多皱、波状网纹。某些种不同部位的纹饰差异较为明显。本研究结果对种间鉴别具有重要意义,并且不支持将珍珠伞A. maculosa归并入钮子果A. polysticta中。

The fruit surface features of 16 species of Ardisia Sect.Crispardisia from China were examined with scanning electron microscopy（SEM）.The fruits are spheroidal in shape,glabrous,rarely villous.Mostly punctate,rarely not puncate or unconspicuous,in the form of verrucate,granulata or transverse claviform,usually corresponding with protuberance on fruit surface.The surface ornamentation falls into 3 types：subsmooth,rugose,and undulate-reticulate.Some species have two types of ornamentation.The differentiation of ornamentation is obvious in some species.These results are very helpful in distinguishing between the species in the genus,and do not support the reduction of A.maculosa into A.polysticta.