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During 1998 - 1999, the course of the berry coloring and the development of the pigment cells from veraison to ripeness were studied by freeze sectioning 43 accessions of 12 Vitis species (including 10 Chinese wild species). External observation showed that the berries of most species began coloring on the fruit top surface or on the sun-lit surface, and the berry surface color was evenly distributed when the berry was ripe. Internal observation revealed that the pigment cells in a few layers between cuticle and sub-cuticle colored
During 1998 - 1999, the course of the berry coloring and the development of the pigment cells from veraison to ripeness were studied by freeze sectioning 43 accessions of 12 Vitis species (including 10 Chinese wild species). External observation showed that the berries of most species began coloring on the fruit top surface or on the sun-lit surface, and the berry surface color was evenly distributed when the berry was ripe. Internal observation revealed that the pigment cells in a few layers between the cuticle and the sub-cuticle colored