Ontogeny and environment as determinants of the secondary chemistry of three species of white birch
Ontogeny and environment as determinants of the secondary chemistry of three species of white birch
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DOI：
10.1007/s10886-005-7100-5
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发表时间：
2005-10-01
影响因子：
2.3
通讯作者：
Tahvanainen, J
中科院分区：
文献类型：
--
作者：
Laitinen, J;Julkunen-Tiitto, R;Tahvanainen, J
本研究调查了三个密切相关的，冬季休眠的白色桦树（Betula resinifera，B）树皮次生化学的变化。pendula和B. Platyphylla）在不同的个体发育阶段通过使用不同的植物部分（顶部和基部）。在不同营养水平的两种生长条件（盆栽和田间）下，试验桦树生长了4年。树皮中次生化学物质存在着明显的种特异性数量和质量变异，但这种变异也受到施肥和树龄的影响。一般来说，有更大的化学多样性在树苗比在幼苗。这项研究揭示了三种新的成分，开环异落叶松树脂醇9-O-β-吡喃葡萄糖苷及其两种衍生物，以前没有报道过白色桦树皮。主成分分析表明，所研究的物种在幼年期具有相似的化学成分，但随着植物的生长，它们变得更加明显的分化，这表明，较老的植物的物种可以通过化学分类学来识别。很明显，桦树的次生化学是受遗传控制的，但它受到生长条件和个体发育特性的影响。
This study investigates variation in the secondary chemistry of the bark of three closely related, winter-dormant species of white birch (Betula resinifera, B. pendula, and B. platyphylla) at different ontogenetic stages by using different plant parts (top and base). The experimental birches were grown for 4 years in two growing conditions (pot and field) at different nutrient levels. There was considerable species-specific quantitative and qualitative variation in the secondary chemicals in bark, but this was also affected by fertilization and the age of the plant. In general, there was greater chemical diversity in saplings than in seedlings. The study revealed three new components, secoisolariciresinol 9-O-beta-glucopyranoside and two of its derivatives, that have not been reported previously for the bark of white birches. Principal component analysis showed that the species studied had a similar chemical composition at the juvenile stage, but as the plants grew, they became more clearly differentiated, which indicates that the species of older plants can be identified by chemotaxonomy. Evidently, the secondary chemistry of birches is under genetic control, but it is affected by properties of growing conditions and ontogeny.