E-55 植物成長調節物質処理がトチノキ(Aesculus turbinata)の休眠芽の成長と開芽に及ぼす効果

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The present study deals with the effects of application of 10 different kinds of plant growth regulators (PGRs), which are Gas (GA_3 and GA_4), IAA, transzeatin (t-Z), (+)-abscisic acid, Ethrel (ET), 24-epibrassinoride (24-epi-BR), (±) -jasmonic acid methyl ester ((±)-JA-Me), uniconazole-P and AMO-1618, on growth and flushing of dormant buds in 2year-old Aesculus turbinata seedlings. Seven different concentrations of PGRs from 0.0001 to 500μg/10μ1(50% acetone) were prepared and each 10μ1 solution was applied to the apical bud of each seedling by injection with a microliter syringe. Four seedlings were used for the same treatment, A. turbinata 10μ1 of 50% acetone solution also was applied to seedlings as a control. The treatments were started on June 6, 1998 and repeated 4 times at 7 day intervals. The application of GA_3 and GA_4 at higher concentrations increased the growth of apical buds. However, the growth was suppressed by the applications of low concentrations of IAA, high concentrations of t-Z, (+) -ABA, Ethrel, uniconazole -P and AMO-1618. The growth of lateral buds was accelerated by the applications of high levels of Gas, uniconazole-P, and AMO-1618. These results suggest that the Gas are essential in the growth of dormant buds in A. turbinata seedlings. The applications of Gas, IAA, (±)-JA-Me and Ethrel enhanced the flushing of dormant buds at various concentrations, suggesting the roles of those PGRs in bud breaking. In IAA-applied seedlied seedlings, the apex of apical buds became round shaped. The leaflets on apical buds were fallen in the IAA or Ethrel treated seedlings.
植物化学調節学会の論文
1998-10-01

E-55 植物成長調節物質処理がトチノキ(Aesculus turbinata)の休眠芽の成長と開芽に及ぼす効果

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