EFFECT OF 6-BENZYLAMINO PURINE APPLICATION AND FRUIT LOAD ON THE BUD SPROUTING AND FLOWERING OF SATSUMA ( CITRUS UNSHIU MARC.) TREES IN A HEATED GREENHOUSE
The previous year's fruit load and application of 6-benzylamino purine (BA) affected bud sprouting and inflorescence development of Wase satsuma trees grown in the heated greenhouse. Foliar BA application considerably accelerated bud sprouting and increased the number of both leafy and leafless inflorescences. Such effects, caused by BA spraying, were detected about one week after treatment. In both the BA-treated and control limbs, the previous year's overload of fruit obviously decreased the percentage of bud sprouting and flowering of shoots. The sequence of sprouting among the different types of inflorescences was distinctly aldtered by BA treatment. In the BA-treated limbs leafy inflorescences, or leafy floral shoots, began to sprout followed by leafless inflorescences and vegetative shoots. In the control the following sequence of bud sprouting was seen: leafless inflorescences, vegetative shoots, and leafy inflorescences. BA application greatly increased the number of leafy inflorescences, although the total number of flowers produced depended closely upon the preceding season's crop. From these results it is suggested that there are close interactions between the previous year's fruit load and stimulative effects of BA on bud sprouting and flowering in satsuma trees. The increase in proportion of leafy inflorescences among the initiated buds resulted in an enhancement of mean fruit size.
Zhu, X.R. and Matsumoto, K. (1988). EFFECT OF 6-BENZYLAMINO PURINE APPLICATION AND FRUIT LOAD ON THE BUD SPROUTING AND FLOWERING OF SATSUMA ( CITRUS UNSHIU MARC.) TREES IN A HEATED GREENHOUSE. Acta Hortic. 230, 419-426