Sex expression of staminate cluster as affected by pinching the main shoot, defoliation and N*[6)-benzylaminopurine in monoecious cucumber
1993
Kanapol Jutamanee | Saito, Takashi | Kanchama, Kouki | Takeno, Kiyotoshi | Suranant Subhadrabandhu (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Horticulture)
Effects of pinching the main shoot, defoliation and N*[6)-benzylaminopurine (BA) on sex expression in cucumber were investigated by using a qualitative cucumber, cv.. Sagami-hanjiro. Pinching main shoot induced development of bisexual, pistillate flowers and lateral shoots. Direct application of BA to the staminate cluster at node 4 or 7 induced pistillate flower development only on that cluster, especially on that at the node 4. The defoliation by allowing one leaf remained in the plant decreased the total numbers of flower of all sexes. However, the defoliation with one leaf remaining at node 4 or 7 gave the same total numbers of staminate, bisexual, pistillate flowers and lateral shoots when compared with those at the corresponding nodes in the control plants. The reduction of leaf area to half or quarter had no effect on the total numbers of staminate and bisexual flowers, but this method decreased the total numbers of pistillate flowers.
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