ISHS Acta Horticulturae 179: V International Symposium on Growth Regulators in Fruit Production
POSTPOLLINATION EVENTS IN ALMOND FLOWERS: PLANT GROWTH SUBSTANCES AS RELATED TO EMBRYO SAC DEVELOPMENT |
| Authors: | Kitren G. Weis, Vito S. Polito |
| Abstract:
In vivo production of endogenous ethylene by pistils of pollinated and nonpollinated almond flowers was measured and a strong correlation of elevated levels of ethylene production with successful cross-pollination was noted. Cross-pollinated and nonpollinated pistils were treated with AOA (aminooxyacetic acid), an inhibitor of ethylene synthesis, and ethylene evolution and embryo sac development were monitored. The possible role of auxin in postpollination phenomena was investigated using applications of NAA (naphthaleneacetic acid) on cross- and nonpollinated pistils. Ovule development in these and GA-treated, nonpollinated pistils was evaluated for stage of embryo sac development and length of the embryo sac. In general, embryo sac development was enhanced by treatments with NAA and AOA, regardless of pollination treatment. GA treatment appeared to substitute for pollination to some extent. | |
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