+ Translate
+ Most Popular
The pigeon tick (Argas reflexus): its biology, ecology, and epidemiological aspects
Prevalence of hemoglobin abnormalities in Kebili (Tunisian South)
Lipogranuloma: a preventable complication of dacryocystorhinostomy
Value of basal plasma cortisol assays in the assessment of pituitary-adrenal insufficiency
Bees from the Belgian Congo. The acraensis group of Anthophora
Placing gingival retraction cord
Total serum IgE, allergy skin testing, and the radioallergosorbent test for the diagnosis of allergy in asthmatic children
Acariens plumicoles Analgesoidea parasites des oiseaux du Maroc
Injuries of terminal phalanges of the fingers in children
Biology of flowering and nectar production in pear (Pyrus communis)
Das Reliktvorkommen der Aspisviper (Vipera aspis L.) im Schwarzwald
Hydrological modelling of drained blanket peatland
Pathologic morphology and clinical significance of the anomalous origin of the left circumflex coronary artery from the right coronary artery. General review and autopsy analysis of 30 cases
Cyto genetic analyses of lymphocyte cultures after exposure to calcium cyclamate
Axelrodia riesei, a new characoid fish from Upper Rio Meta in Colombia With remarks concerning the genus Axelrodia and description of a similar, sympatric, Hyphessobrycon-species
Favorable evolution of a case of tuberculosis of pancreas under antibiotic action
RIFM fragrance ingredient safety assessment, Valencene, CAS Registry Number 4630-07-3
Parenteral microemulsions: an overview
Temperate pasture: management for grazing and conservation
Evaluation of a new coprocessed compound based on lactose and maize starch for tablet formulation
Thermal expansion and cracking of three confined water-saturated igneous rocks to 800C
Revision of the genera of the tribe Stigmoderini (Coleoptera: Buprestidae) a discussion of phylogenetic relationships
Anal tuberculosis. Report of a case
Gastric tuberculosis in the past and present
Adaptive responses of the cardiovascular system to prolonged spaceflight conditions: assessment with Holter monitoring

Boundary layer conductance, leaf temperature and transpiration of Abies amabilis branches

Boundary layer conductance, leaf temperature and transpiration of Abies amabilis branches

Tree Physiology 19(7): 435-443

ISSN/ISBN: 0829-318X

PMID: 12651549

DOI: 10.1093/treephys/19.7.435

We used three methods to measure boundary layer conductance to heat transfer (g(bH)) and water vapor transfer (g(bV)) in foliated branches of Abies amabilis Dougl. ex J. Forbes, a subalpine forest tree that produces clumped shoot morphology on sun-formed branches. Boundary layer conductances estimated in the field from energy balance measurements increased linearly from approximately 10 mm s(-1) at low wind speeds (< 0.1 m s(-1)) to over 150 mm s(-1) at wind speeds of 2.0 m s(-1). Boundary layer conductances measured on shoot models in a wind tunnel were consistently higher than field measurements. The difference between wind tunnel values and field measurements was attributable to variation in path length between the two experimental environments. Boundary layer conductance estimated by subtracting stomatal resistance (r(sV)) measured with a porometer from the total branch vapor phase resistance were unusually small. Sensitivity analysis demonstrated that this method is not suitable for coniferous foliage or when stomatal conductance (g(sV)) is small compared with g(bV). Analysis of the relative magnitudes of g(sV) and g(bV) revealed that, under most conditions, A. amabilis branches are well coupled (i.e., g(sV) is the dominant controller of transpiration). The boundary layer conductance to heat transfer is small enough that leaf temperature can become substantially higher than air temperature when radiation is high and wind speed is low. Over a two-month period, the maximum difference between leaf and air temperatures exceeded 6 degrees C. Leaf temperature exceeded air temperature by more than 2 degrees C on 10% of the daylight hours during this period. Consideration of both the photosynthetic temperature response of A. amabilis foliage as well as the summer air temperature conditions in its habitat suggests that these elevated leaf temperatures do not have a significant impact on carbon gain during the growing season.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 048404062

Download citation: RISBibTeXText

Related references

Effects of low wind speeds on water loss and leaf temperature in Abies amabilis foliage Boundary layer resistances. Bulletin of the Ecological Society of America 77(3 Suppl Part 2): 285, 1996

Crown conductance and tree and stand transpiration in a second-growth Abies amabilis forest. Canadian Journal of Forest Research 27(6): 797-808, 1997

Evaluation of leaf boundary layer conductance of a whole plant by application of abscisic acid inhibiting transpiration. Biotronics 24: 51-58, 1995

Temperature bud burst relationships on amabilis fir abies amabilis and subalpine fir abies lasiocarpa provenance tests replicated at different elevations. Silvae Genetica 32(5-6): 203-209, 1983

Stomatal conductance, gaseous exchange and transpiration Examples with Scots pine, Pinus sylvestris, boundary layer conductance, gas exchange. Symposium British Ecological Society: 1st) 175-204, 1981

Control of transpiration in a 220-year-old Abies amabilis forest. Forest Ecology and Management 152(1/3): 211-224, 2001

Leaf stomatal conductance, transpiration and leaf temperature in Musa germplasm. Plant Physiology (Rockville) 105(1 Suppl): 112, 1994

Analysis of variation in leaf and twig characters of abies lasiocarpa and abies amabilis from north coastal british columbia. Canadian Journal of Botany 57(12): 1354-1366, 1979

Carbon autonomy in abies amabilis branches growth vs survival. Bulletin of the Ecological Society of America 71(2 Suppl): 333-334, 1990

Leaf conductance to vapor diffusion and transpiration as a function of leaf temperature of lettuce plants under hydroponics culture. Revista Cientifica Rural 9(2): 106-112, 2004

Air humidity within boundary layer of a transpiring leaf i. relationship between transpiration and water vapor density at leaf surface. Biotronics 16: 39-46, 1987

Within-crown patterns of transpiration, water stress, and stomatal activity in Abies amabilis. For. Sci 16(4): 490-2, 1970

Influence of leaf morphology on stomatal conductance, transpiration, leaf temperature in isolines of ten cotton cultivars under optimum soil moisture and their association with productivity. Annals of Plant Physiology 2(2): 140-148, 1988

A heated leaf replica technique for determination of leaf boundary layer conductance in the field. Agricultural and Forest Meteorology 72(3-4): 261-275, 1995

Estimating transpiration of apple tree branches from leaf stomatal conductance measurements - a first assessment of RATP model on apple trees. Acta Horticulturae 584: 95-100, 2002