BIOCHEMICAL AND PHYSIOLOGICAL ASPECTS OF LEAF DEVELOPMENT IN COCOA (THEOBROMA CACAO)
BIOCHEMICAL AND PHYSIOLOGICAL ASPECTS OF LEAF DEVELOPMENT IN COCOA (THEOBROMA CACAO)
复制标题
可可 (Theobroma Cacao) 叶子发育的生物化学和生理学方面
DOI：
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发表时间：
1984
期刊：
影响因子：
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通讯作者：
K. Hardwick
中科院分区：
文献类型：
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作者：
S. Abo;H. Collin;K. Hardwick
摘要
可可叶片生长休眠周期的休眠阶段与新叶(NF)和前叶(PF)成熟叶中高水平的脱落酸(ABA)相关。无论是去叶还是去叶，可可幼苗休眠周期的长度都缩短了，这表明成熟叶片是影响顶端活力的生长抑制物质的来源。ABA处理能延长叶片的休眠期，而用玉米素或赤霉酸处理则使休眠期延长。[~(14)C]ABA在整个生长周期的不同时期施于氮肥和酚醛叶片后的分布表明，在芽休眠的最后阶段(I-1和I-2)，[14 C]ABA在芽中的积累量比在前期(F-2)的要大。结果表明，在F-2阶段，营养物质的内部竞争可能是抑制生长的原因，但从成熟叶片转移的ABA导致芽在随后的I-1和I-2阶段保持休眠。
Summary
The dormant phase of the flush cycle of leaf growth in cocoa is known to be correlated with high abscisic acid (ABA) levels in the mature leaves of the new flush (NF) and previous flush (PF) leaves. Defoliation of either the NF leaves or PF leaves of cocoa seedlings reduced the length of the dormant phase of the flush cycle, thus showing that the mature leaves were a source of growth inhibitors which could affect shoot apical activity. The application of ABA to the NF and PF leaves led to an extension of the dormant phase, whereas application of zeatin or gibberellic acid decreased it. The distribution of [14C]ABA following its application to NF and PF leaves at different stages throughout the growth cycle showed that [14C] ABA was accumulated by the bud in relatively larger amounts during the final stages of bud dormancy (I-1 and I-2) than in the earlier stage (F-2). The results suggest that internal competition for nutrients may be responsible for the inhibition of growth at the F-2 stage but that ABA translocated from the mature leaves causes the buds to remain dormant during the subsequent stages of I-1 and I-2.