‘川野なつだいだい’の花芽分化と葉及び樹皮中のタンパク質, アミノ酸含量との関連

Abstract

Soluble protein and amino acid contents in leaf and bark tissues of ‘Kawano natsudaidai’ were investigated in relation to flower bud formation. Physiological flower bud formation of ‘Kawano natsudaidai’ was initiated early in November and ended early February. Protein content in leaf and bark tissues of non-bearing shoots was always higher than in both tissues of bearing shoots. Particularly, protein content in non-bearing shoots increased markedly at early stage of flower bud formation. But there were no significant differences in amino acid content in leaf and bark tissues of bearing and non-bearing shoots. When solutions of GA3 (250ppm) and BA (300ppm) were separately sprayed on non-bearing shoots, protein content in leaf and bark tissues, and also amino acid content in bark sharply decreased with the GA3 application. However, they were not affected by the BA application. Both GA3 and BA solutions were sprayed on nonbearing shoots, and percentages of flower set in the following season were investigated. Only the GA3 application drastically inhibited the percentages of flower set, when compared to the control, BA application had little effect on the percentage of flower set.