A non-destructive method for scanning electron microscopy allows individual developing flower surfaces to be imaged sequentially. Kinematic analysis, the quantitative characterization of expansion behavior, can be applied to consecutive images of the same primordium. The individual cell, delimited as a polygon by its anticlinal walls, is the unit of analysis. Growth in two dimensions is characterized by a right-angle cross giving the maximal and minimal rates of extension relative to a known side of the cell. Methods have been developed here to make the analysis rapid and the results easy to portray. Data were obtained for the flower primordium of Anagallis arvensis L.
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