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对香荚兰(Vanilla planifolia)开放的花施用生长调节剂,是否能象人二授粉那样结荚、成荚,这已获得结果。用2,4—D、dicamba和IAA—IBA糊剂诱导的结荚率都很高。只有最高浓度的NAA处理才能获得与上述处理相似的结荚率。Gibrel处理的结荚率低。用0.1mg2,4—D羊毛脂糊剂涂于花萼基部四周诱导结荚,虽然荚重量比人工授粉的轻,但荚大小却相当。在一个花序上重复施用0.1％2.4—D羊毛脂糊剂,结4个荚后摘除其余全部未开放的花,几乎不影响已结荚果的大小。dicamba和2, 4—D都能从处理花转移到同一花序的其它花蕾并诱导这些花蕾结荚。dicamba也能从一个花序传递到另一花序。单性荚和人二授粉荚的生长曲线都是S型。用0.1mg2.4—D处理的花,其子房最大生长速率在施药后第一周,而人工授粉的则在授粉后第三周。浸剂的色谱表明,所有单性荚样品中都含有香兰素。
The effect of applying growth regulators to flowers open to Vanilla planifolia can be podded and podded as in the pollination of humans, which has yielded results. Pod rates induced with 2,4-D, dicamba and IAA-IBA pastes were high. Only the highest concentration of NAA treatment yielded pod rates similar to those described above. Gibrel-treated pods low. Patch was induced by applying 0.1 mg 2,4-D lanolin paste around the base of the calyx. Although the pod weight was lighter than that of artificial pollination, the pod size was comparable. Repeated application of 0.1% 2.4-D lanolin paste on one inflorescence and removal of all remaining unopened flowers after 4 pods had almost no effect on the size of pod already. Both dicamba and 2, 4-D can transfer flower buds to other flower buds in the same inflorescence and induce these flower bud pods. Dicamba can also pass from one inflorescence to another. The growth curves of unisexual pods and human pollinated pods are all S type. Flowers treated with 0.1 mg 2.4-D had maximum ovary growth rates in the first week after application and artificial pollination in the third week after pollination. Chromatography of the infusion showed that vanillin was present in all unisexual pods.