Abstract
The paper is the first results of the study of age variation of wood anatomy in Larix cajanderi Mayr (Pinaceae). The anatomical study was made from one L. cajanderi tree grown in the optimal habitat for L. cajanderi within areal of this species. Age variability of anatomical characteristics in the direction from pith to bark and along the height of stem is described in detail. Mature wood in L. cajanderi is formed in the base of stem and at breast height in the growth rings numbers 31~40 inclusively, and in the middle of stem in the growth rings numbers 41~50 inclusively. Characteristic features of mature stem wood were not found near the top of tree. Maximal parameters of anatomical characters usually occur in the base of stem. Age variation of wood anatomical characteristics in L. cajanderi tree was obtained for the first time.
Highlights
Larch is one of the main forest forming conifers of the Russian Far East (RFE)
The aim of our study is an attempt to contribute to the description of the wood anatomy of L. cajanderi, to the examination of age variability of anatomical characteristics in the direction from pith to bark and along the height of stem, and to the determination of the time of the formation of mature wood which features are important in systematics and diagnostic
The current study of age variability of anatomical characteristics made in the direction from pith to bark and along the height of stem of L. cajanderi model tree selected from the optimal habitat for this larch growth in the montane taiga belt of the Amur River basin (RFE) is contributed to the description of the wood anatomy of the species L. cajanderi
Summary
Larch is one of the main forest forming conifers of the Russian Far East (RFE). there is no consensus on number of the Larix Mill. species naturally growing in the RFE. Sukachev (1924) did not recognize L. cajanderi as a species taxon and did not even mention it in the work in systematics, phylogeny and historical development of the larches. Sukachev (1924) considered the Dahurian larch, L. dahurica Turcz. (= L. gmelinii Litv.), in its broadest sense and believed the growing of this larch within the territory of East Siberia (Russia) and adjacent regions of Mongolia and China. According to Ostenfeld and Syrach-Larsen (1930), L. cajanderi is synonymous with L. gmelini (Rupr.) Gord., which again is the same as L. dahurica Turcz. Farjon (1990) recognizes L. cajanderi as one of the synonyms of L. gmelinii (Rupr.) Kuzen. Fu et al (1999) did not mention L. cajanderi in Flora of China; according to those authors, L. gmelinii (Rupr.) Kuzen. According to Ostenfeld and Syrach-Larsen (1930), L. cajanderi is synonymous with L. gmelini (Rupr.) Gord., which again is the same as L. dahurica Turcz. Farjon (1990) recognizes L. cajanderi as one of the synonyms of L. gmelinii (Rupr.) Kuzen. Fu et al (1999) did not mention L. cajanderi in Flora of China; according to those authors, L. gmelinii (Rupr.) Kuzen. is spread in Northern China, Korea, Mongolia and East Russia
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