Phenolics from Larix needles. XVI. Inter- and intra-clonal variation in Larix leptolepis

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Abstract
The quantitative variation of needle flavonoids within and between different clones of Larix leptolepis was determined for leaves growing both on short and on long shoots. Minor quantitative differences were found between trees on one clone, but between different clones large variations occurred, especially for the C-glycoflavone vitexin. Needles growing on long shoots contained more kaempferol-3-(p-coumarylglucoside) and other acylated glycosides and somewhat more vitexin than short-shoot needles, but less kaempferol-, isorhamnetin-, and quercetin-and (or) laricitrin-3-glycosides. No correlation could be found between needle flavonoids and the resistance of some clones to Guignardia laricina.

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