Change of anatomical structure of cremocarp during fruit development of Changium smyrnioides ( Apiaceae ) after falling of flower
The anatomical structure changes of cremocarp transection of Changium smyrnioides Wolff, an endemic species of Apiaceae in China, were comparatively observed during fruit development process after falling of flower. The observation results show that, during young fruit phase, middle fruit phase ( including middle fruit stage Ⅰ , Ⅱ and Ⅲ ) and mature fruit phase (including mature fruit stage Ⅰ ,Ⅱ and Ⅲ ) , some characteristics, such as size and shape of fruit transection, thickness and cell morphology and cell layer number of fruit wall (including exocarp, mesocarp and endocarp) , commissure structure, shape and size of endosperm, with or without perisperm, nucellus degenerating or not and vascular bundle morphology, change obviously. During whole development process, shape of mericarp transection changes from sub-pentagonous round to kidney-shaped round. Fruit wall thickness changes from thick to thin, and number of cell layer deceases gradually. Endosperm enlarges gradually and its shape changes from semi-circle to crescent, U-shaped and C-shaped at last. Perisperm disappears and nucellus degenerates gradually. Abscission layer of commissure becomes more and more obviously until to completely separate. Moreover, numbers of vitta and vascular bundle change a little. Vittae can be divided into two kinds of vascular bundle accompanying vitta and fruit wall vitta. There are 4-6 fruit wall vittae in commissure, which is inconsistant with the related description of Changium Wolff.
NETL
NSTL
万方数据
维普
