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豌豆茎尖切除对茎和子叶中细胞分裂素含量的影响

李春俭

中国农业大学植物营养系.北京 100094

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。

关键词： 豌豆; 顶端优势; 细胞分裂素; 去顶

Influence of apex on endogenous cytokinin contents in stem and cotyledons of pea plants

Li Chunjian

Deparment of Plant Nutrition,China Agricultural University.Beijing 100094

Abstract

Endogenous contents of Z/ZR and i-Ade/Ado in stems of pea plants increased markedly 6 h after decapitation and reached their maxima in another 6 h, then decreased. Application of NAA on the cut surface could simulate the effect of apex and inhibited these changes. Similar pattern of change in cytokinin content was also found in the cotyledons after the same treatments. The increase in endogenous cytokinins caused by decapitation could be partly prevented by the excision of roots and cotyledons. The possible sources of the increased amount of cytokinins in stems and their relation to the growth of lateral buds were discussed.

Key words: Pea;Apical dominance;Cytokinin;Decapiration

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引用本文：

李春俭. 豌豆茎尖切除对茎和子叶中细胞分裂素含量的影响[J]. 生理学报 1996; 48 (3): .

Li Chunjian. Influence of apex on endogenous cytokinin contents in stem and cotyledons of pea plants. Acta Physiol Sin 1996; 48 (3): (in Chinese with English abstract).