CELLULAR SUICIDE SCULPTING. “In Ipomoea (syn. Pharbitis), flower opening and closure are due to movements of the midrib rather than the petal lamina. Differences in cell expansion on both sides drive the movements. The difference in cell expansion was due, in part, to turgor loss in a group of inner epidermal cells of the midrib. For 2 d prior to anthesis, the ultrastructure of these cells underwent rapid changes that are indicative of cell death. Other cells of the rib did not show these changes.”
http://jxb.oxfordjournals.org/content/54/389/1801.full
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022