摘要
豌豆植株去顶后６ｈ，茎中内源Ｚ／ＺＲ和ｉ－Ａｄｅ／Ａｄｏ的含量明显增加，１２ｈ后达到最高值，其后迅速下降、人工合成生长素ＮＡＡ可代替茎尖的作用抑制这些变化。经同样处理后子叶中的ＣＫｓ含量也表现出类似的变化。同时切去茎尖、子叶及根１２ｈ后茎中Ｚ／ＺＲ及ｉ－Ａｄｅ／Ａｄｏ的含量明显低于仅切去茎尖植株的ＣＫｓ含量，但高于ＮＡＡ处理。表明茎尖产生的生长素抑制了茎中ＣＫｓ含量的增加。
Endogenous contents of Z/ZRand i-Ade/Ado in stems of pea plantsincreased markedly 6h after decapitation and reached their maxima in another 6 h, then decreased. Application ofNAA on the cut surface could simulatethe effect of apex and inhibited thesechanges (Fig. 1 ). Similar pattern ofchange in cytokinin content was alsofound in the cotyledons after the sametreatments (Fig. 2 ). The increase inendogenous cytokinins caused by decapitation could be partly prevented'by theexcision of roots and cotyledons (Fig.3 ). The possible sources of the increased amount of cytokinins in stemsand their relation to the growth of lateral buds were discussed.
基金
国家教委留学回国人员科研资助
关键词
豌豆
顶端优势
细胞分裂素
去顶
pea,apical dominance, cytokinin, decapiration
