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在荔枝(Litchi Chinensis Sonn.cv.Heh Yeh)展叶期、芽休眠期(顶叶脱落时)、花芽形成前30天、花芽形成期和盛花期,对田间生长的嫁接荔枝的木质部汁液中细胞分裂素的变化进行了研究.同时,在连续的发育阶段中,也研究了茎尖渗出液中IAA和ABA的变化.在展叶期,木质部汁液中赤霉素的含量较高.在五个生长期中IAA保持稳定水平.花芽形成前30天,ABA急剧增加.同时,木质部汁液中细胞分裂素含量增加,在花芽形成和盛花期达到最大值.在花芽形成前30天至花芽形成期木质部赤霉素含量维持在较低水平.
In the leaves of litchi (Litchi Chinensis Sonn.cv.Heh Yeh), bud dormancy (at the time of parietal lobe shedding), 30 days before flower bud formation, flower bud formation and flowering stage, cells in the xylem juice of litchi The change of mitogen was studied.At the same time, the changes of IAA and ABA in exudates of shoot tip were also studied in the continuous developmental stage.The content of gibberellin in xylem juice was higher during the leaf-setting period.At the fifth IAA remained stable during the growth phase.At 30 days before flower bud formation, ABA increased sharply.At the same time, the content of cytokinin increased in xylem juice and reached its maximum at flower bud formation and flowering.From 30 days before flower bud formation to flower bud formation Woody gibberellin levels remain at a low level.