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Titolo:
Within-tree variation in transpiration in isolated evergreen oak trees: evidence in support of the pipe model theory
Autore:
Infante, JM; Mauchamp, A; Fernandez-Ales, R; Joffre, R; Rambal, S;
Indirizzi:
Univ Sevilla, Dept Biol Vegetal & Ecol, E-41080 Seville, Spain Univ Sevilla Seville Spain E-41080 egetal & Ecol, E-41080 Seville, Spain CNRS, Stn Biol Tour Valat, F-13200 Arles, France CNRS Arles France F-13200 RS, Stn Biol Tour Valat, F-13200 Arles, France CNRS, Ctr Ecol Fonct & Evolut, F-34033 Montpellier, France CNRS Montpellier France F-34033 ct & Evolut, F-34033 Montpellier, France
Titolo Testata:
TREE PHYSIOLOGY
fascicolo: 6, volume: 21, anno: 2001,
pagine: 409 - 414
SICI:
0829-318X(200104)21:6<409:WVITII>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUERCUS-ILEX L; LEAF-AREA; SAP FLOW; CANOPY PHOTOSYNTHESIS; SUMMER DROUGHT; SAPWOOD AREA; NE SPAIN; WATER; RADIATION; RESISTANCE;
Keywords:
dehesa; oak savannah; Quercus ilex; sap flow density; water use;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Infante, JM Univ Sevilla, Dept Biol Vegetal & Ecol, Apdo 1095, E-41080 Seville, Spain Univ Sevilla Apdo 1095 Seville Spain E-41080 0 Seville, Spain
Citazione:
J.M. Infante et al., "Within-tree variation in transpiration in isolated evergreen oak trees: evidence in support of the pipe model theory", TREE PHYSL, 21(6), 2001, pp. 409-414

Abstract

Within-tree variation in sap flow density (SFD) was measured in two isolated evergreen oak (Quercus ilex L.) trees growing in an oak savannah (dehesa) in southwest Spain. Sap flow was estimated by the constant heating method. Three sensors were installed in the trunk of each tree in three orientations: northeast (NE), northwest (NW) and south (S). Sap flow density was monitored continuously from May 18 to September 27, 1993. Daily values of SFD ranged between 500 and 4500 mm(3) mm(-2) day(-1). There were significant differences in SFD between orientations; SFD was higher in the NE and NW orientations than in the S orientation. These differences were noted on both a daily and seasonal time scale, and were less pronounced on cloudy days and at the end of the drought period, when SFD was relatively low. Our results support the idea that branches of trees can be viewed as a collection of small independent plants.

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Documento generato il 27/09/20 alle ore 05:35:51