Hempel F D, Feldman L J
Department of Plant Biology, University of California, Berkeley 94720-3102, USA.
Plant J. 1995 Nov;8(5):725-31. doi: 10.1046/j.1365-313x.1995.08050725.x.
Within wild-type Arabidopsis populations, a subset of the plants were found to have a single chimeric shoot on their primary shoot axes. The chimeric shoots were located below the lowest primary-axis flower; and they exhibited features of both flowers and paraclades (lateral flowering shoots). Morphological analyses of chimeric shoots indicated that they developed from single primordia. In each chimeric shoot, the side furthest from the apical meristem was specified as 'flower'--while the side closest to the meristem was specified as 'paraclade'--suggesting that a stimulus from outside the apical meristem can directly induce primordia to develop as flowers. It is concluded that the development of the teratological chimeric shoots resulted from the overlap of the vegetative and floral specification processes within single primordia.
在野生型拟南芥种群中，发现一部分植株的主茎轴上有一个单一的嵌合芽。嵌合芽位于最低的主茎花下方；它们表现出花和侧生花枝（侧生开花枝）的特征。对嵌合芽的形态学分析表明，它们由单个原基发育而来。在每个嵌合芽中，离顶端分生组织最远的一侧被指定为“花”——而离分生组织最近的一侧被指定为“侧生花枝”——这表明来自顶端分生组织外部的刺激可以直接诱导原基发育成花。得出的结论是，畸形嵌合芽的发育是由于单个原基内营养和花的指定过程重叠所致。
