The Ecophysiology of Xylem Hydraulic Constraints by 'Basal' Vessels in Canella winterana (Canellaceae)

Autor:	Kurt McLaren, Chait A. Sharma, Taylor S. Feild, Lawong Balun, David S. Chatelet, Angela A. Patino, Patrick J. Hudson
Rok vydání:	2011
Předmět:	Ecophysiology Tropical and subtropical dry broadleaf forests Canellaceae biology Ecology fungi Perforation (oil well) Drought tolerance food and beverages Xylem Plant Science biology.organism_classification Basal angiosperms Botany Canella Ecology Evolution Behavior and Systematics
Zdroj:	International Journal of Plant Sciences. 172:879-888
ISSN:	1537-5315 1058-5893
DOI:	10.1086/660106
Popis:	Early angiosperms are hypothesized as constrained to wet environments where many of their defining characteristics evolved. A functional capability potentially enforcing the wet habitation of early angiosperms was possession of xylem with low hydraulic capability and drought intolerance. Recent studies indicate that a structural hallmark of these performances is long, steeply angled scalariform perforation plates in extant basal angiosperms. However, Canella winterana (Canellaceae), a magnoliid, appears to have radiated into much drier tropical dry forest habitats despite possessing a wood vasculature structurally similar to hypothesized ancestral wet-adapted system for angiosperms as a whole. Based on a field study of Canella wood hydraulic function, we present ecophysiological data that basal vessels do not necessarily mark low resistance to drought. We found that Canella wood was resistant to drought-induced cavitation. Leaf hydraulic capacity as well as leaf pressure-volume relations and leaf ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::58f7b39bba63ab9614fc994448ae05e1 https://doi.org/10.1086/660106 Zobrazit plný text záznamu Plný text ve formátu PDF