Factors affecting the vertical distribution of Betula platyphylla var. japonica and Betula ermanii on Mt. Neko in Nagano Prefecture, Japan
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چکیده
منابع مشابه
Antioxidant and anticancer activity of extract from Betula platyphylla var. japonica.
The antioxidant and anticancer properties of a medicinal plant, Betula platyphylla var. japonica were investigated. The total methanol extract of B. platyphylla var. japonica had protective effects against hydrogen peroxide (H2O2) in the Chinese hamster lung fibroblast (V79-4) cell line and induced apoptotic cell death in human promyelocytic leukemia (HL-60) cells, a cancer cell line. B. platyp...
متن کاملPhotosynthetic response of early and late leaves of white birch (Betula platyphylla var. japonica) grown under free-air ozone exposure.
Betula platyphylla var. japonica (white birch) has heterophyllous leaves (i.e., early and late leaves) and is a typical pioneer tree species in northern Japan. Seedlings of white birch were exposed to ozone during two growing seasons, and measurements were carried out in the second year. Early leaves did not show an ozone-induced reduction in photosynthesis because of lower stomatal conductance...
متن کاملOxidosqualene cyclases from cell suspension cultures of Betula platyphylla var. japonica: molecular evolution of oxidosqualene cyclases in higher plants.
Betula platyphylla var. japonica is a rich source of triterpenoid as it contains dammarane type triterpenes in the leaves, and lupane type and oleanane type triterpenes in the bark. Four oxidosqualene cyclase cDNAs (BPX, BPX2, BPW and BPY) were cloned by homology based PCR methods from cell suspension cultures of B. platyphylla var. japonica. Open reading frames consisting of 2274, 2304, 2268 a...
متن کاملDecline of Betula ermanii with Special Reference to Ozone Concentration at Mt. Mae-Shirane, Oku-Nikko, Japan
During June to October 2000 and 2001 we measured the height, Diameter at Breast Height (DBH) and stand density of Betula ermanii trees at Mt. Mae-Shirane, Japan and the ozone concentration there to explore the relationship between ozone concentration and the decline of B. ermanii trees on the mountain. Height, DBH and stem volume were lower on the southeast-facing slope than on the northwest-fa...
متن کاملRelationships of climate change and tree ring of Betula ermanii
Based on the tree-ring growth characteristics of Erman’s birch (Betula ermanii charm.) and the relationships between it and climatic factors at elevation of 1950m, the sensitivity of tree lines in Changbai Mountain to climatic factors was assessed. The results indicated tree line forest in Changbai Mountain had an obvious sensitivity to climate factors. However, difference from other study sits...
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ژورنال
عنوان ژورنال: Journal of Ecology and Environment
سال: 2010
ISSN: 2287-8327
DOI: 10.5141/jefb.2010.33.2.121