Freezing avoidance in tropical Andean bamboos
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Date
2014Palabras Clave
Supercooling capacity, Tropical Andes, Chusquea, Bambusoideae, Altitudinal gradients.Metadatos
Afficher la notice complèteRésumé
Frost resistance was compared in five species of different life forms in the neotropical woody
bamboo genus
Chusquea growing along a cloud forest-paramo gradient, between 2250-4010 m
a.s.l. in the Venezuelan Andes. C. multiramea and C. serrulata are viny bamboos of the upper
montane cloud forest-treeline ecotone (2400-2900 m); whereas C. angustifolia C. spencei and
C. guirigayensis are shrublike bamboos associated to swampy low elevation paramos (2525 m) in
the first case, a broad range of paramo ecosystems (2670-3600 m) in the second, and dry high
elevation paramos in the third (3800-4010 m). Intercellular ice nucleation and 50% tissue injury
temperatures were estimated in these five species under laboratory conditions in order to determine
frost resistance mechanisms. No significant differences were observed among ice nucleation and
tissue injury temperatures in any of these species, indicating that all avoid intercellular ice nucleation
through supercooling (-12.3 to -10.1 ºC). We conclude that variations in supercooling capacity
and freezing injury are not related to life form, habitat or elevation and that freezing temperatures
are not a determining factor in the altitudinal distribution of tropical Andean bamboos.
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Información Adicional
Correo Electrónico | fely@ula.ve, fely@intercable.net.ve frada@ula.ve |
Editor | The Journal of the American Bamboo Society 27:1-10. |
Citación | Ely F, Kiyota S, Rada F. 2014. Freezing avoidance in tropical Andean bamboos. Bamboo Science and Culture: The Journal of the American Bamboo Society 27:1-10. |
Colación | 1-10 |
Institución | Universidad de Los Andes |