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betula_pubescens_ehrh [2015/04/26 19:19] andreas |
betula_pubescens_ehrh [2018/08/30 22:03] (aktuell) andreas |
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- | Betula pubescens Ehrh. - Betulaceae - downy birch, moor birch, **Moor-Birke** | + | Betula pubescens Ehrh. - Betulaceae - downy birch, moor birch, **Moor-Birke** |
- | + | ||
- | Deciduous tree, up to 20m tall, native to North Europe and West Asia; | + | |
Betula pubescens subsp. pubescens - syn. Betula alba L. - white birch \\ | Betula pubescens subsp. pubescens - syn. Betula alba L. - white birch \\ | ||
Betula pubescens subsp. tortuosa - syn. Betula tortuosa Ledeb. - mountain birch | Betula pubescens subsp. tortuosa - syn. Betula tortuosa Ledeb. - mountain birch | ||
- | Fresh birch leaves own a very pleasant " | + | Deciduous tree, up to 20m tall, native to North Europe and West Asia. |
- | Analyses showed that (Z)-3-hex-en-1-ol and 1-hexanol are major constituents of the birch-leaf volatiles | + | |
- | from both B.pubescens (27%) and B.pendula (19%). Other compounds present are (E)-2-hexenal, | + | Fresh birch leaves own a very pleasant " |
[Volatiles from nonhost birch trees inhibit pheromone response in spruce bark beetles. Byers, J. A., Zhang, Q. H., Schlyter, F., Birgersson, G., Naturwissenschaften, | [Volatiles from nonhost birch trees inhibit pheromone response in spruce bark beetles. Byers, J. A., Zhang, Q. H., Schlyter, F., Birgersson, G., Naturwissenschaften, | ||
[[http:// | [[http:// | ||
- | {{:betula_alba.jpg?500}} | + | Main headspace volatiles collected in situ from leaf-bearing branches of B.pubescens were (ng/g dry leaf matter): (Z)-3-hexenol (62-202), (Z)-3-hexenyl acetate (26-501), α-pinene (1-186), β-pinene (1-102), sabinene (11-1250), (E)-β-ocimene (114), α-copaene (11-153), β-caryophyllene (174-496), caryophyllene oxide (98-184), and some unidentified sesquiterpenes. Other compounds found included eg. hexanol, nonanal, hexyl acetate, (E)-2-hexenyl acetate, (Z)-3-hexenyl butanoate, 3-carene, p-cymene, several unidentified sesquiterpenes, |
- | Masclef, A., Atlas des plantes de France, vol.3, t.306 (1891) \\ | + | [Zhang, Qing-He, et al. "Leaf volatiles from nonhost deciduous trees: variation by tree species, season and temperature, |
- | [[http://plantgenera.org/ | + | |
+ | The rectified [[http:// | ||
+ | [Molecular characterisation of birch bark tar by headspace solid-phase microextraction gas chromatography-mass spectrometry: | ||
+ | |||
+ | The main components of the essential oil from the buds of B. pubescens ssp. pubescens and B.pubescens ssp. czerepanovii were caryophyllene derivatives like 14-acetoxy-β-caryophyllene (30.0-32.5%), | ||
+ | [Başer, K. Hüsnü Can, and Betül Demirci. " | ||
+ | |||
+ | „The major components of the volatile oil from the inner bark of B. pendula were trans alpha-bergamotene (31%) and alpha-santalene (19%). This composition was quite different from that of the oil from the branches, buds and leaves of the same species from Turkey, but was very similar to that of the oil from the bark of B. pubescens from Russia. The major components of the oil from the inner bark of B. papyrifera were trans alpha-bergamotene (18%), ar-curcumene (12%), E-beta-farnesene (12%), Z-beta-farnesene (10%) and cis-alpha-bergamotene (8%).“ \\ | ||
+ | [Weston, Roderick J., and Gerald J. Smith. " | ||
+ | |||
+ | {{:betula_pubescens.jpg?600}} \\ | ||
+ | Betula pubescens Ehrh. var. tortuosa as Betula odorata Bechst. var. tortuosa \\ | ||
+ | Flora Danica [G.C. Oeder et al], fasicle 49, t. 2918 (1761-1883) \\ | ||
+ | [[http://botanicalillustrations.org/ | ||
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+ | {{http:// | ||
+ | Betula pubescens\\ © Rolf Marschner (2007), | ||
+ | [[http:// |