LEAF SURVIVAL OF WOODY-PLANTS IN DECIDUOUS BROAD-LEAVED FORESTS .1. TALL TREES
LEAF SURVIVAL OF WOODY-PLANTS IN DECIDUOUS BROAD-LEAVED FORESTS .1. TALL TREES
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DOI：
10.1139/b83-230
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发表时间：
1983-01-01
期刊：
影响因子：
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通讯作者：
KIKUZAWA, K
中科院分区：
文献类型：
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作者：
KIKUZAWA, K
对日本北方北海道落叶阔叶林中41种高木每枝平均叶数的季节变化进行了研究。出叶模式可分为继生型、中间型和齐生型三种。2 spp。结果表明，后继类型的出苗模式具有单叶双托叶的同源冬芽。中间型或齐平型出苗类型的种通常有异生冬芽，芽鳞数枚。出叶时间与芽鳞数呈负相关。具有较长的出叶持续时间的物种是开放的土地或间隙入侵者。其中，落叶持续时间长的品种主要分布在滨江林。另一方面，物种表现出冲洗型叶出现的持续时间短，几乎同时落叶也持续时间短，主要是在混交林中发现。芽鳞与叶分化不完全的种，茎基部叶的寿命短。结果表明，在枝中的主要进化趋势是由同源结构向异源结构发展，并趋向于叶与芽鳞的明显区分。
Seasonal changes in mean numbers of leaves per shoot were shown for 41 tall-tree species in deciduous broad-leaved forests in Hokkaido, northern Japan. Three types of leaf-emergence pattern were recognized; namely succeeding type, intermediate type and flush type. The 2 spp. showing the succeeding type emergence pattern have homonomous winter buds characterized by 1-lamina and 2-stipules sets. The species of intermediate- or flush-type emergence pattern usually have heteronomous winter buds several buds scales. A negative correlation was found between leaf-emergence duration and number of bud scales. Species having a long leaf-emergence duration were open land or gap invaders. Among them, those having long leaf-fall duration were found in riverside forests. On the other hand, species showing flush-type leaf emergence with short duration and almost simultaneous leaf fall with also short duration were mainly found in mixed-forest stands. The longevities of leaves at the basal part of the shoot were short in the species whose bud scales have not entirely differentiated from foliage leaves. The main evolutionary trend in the shoots was suggested to be from homonomous to heteronomous structure and towards the clear distinction between foliage leaves and bud scales.