Summary
Thermal conductivities of fresh leaves, both unmodified and infiltrated with water, were measured. Samples were placed between silver plates of known and differing temperatures, and the time required to boil off a constant volume of liquid was measured. The species used are evergreens: Eucalyptus globulus Labill. (sclerophyllous) with isolateral leaf symmetry; and Peperomia obtusifolia A. Dietr. (succulent), Citrus limon Burm. f. (mesophyllous), Arbutus menziessii Pursh. (sclerophyllous), and Heteromeles arbutifolia M. Roem. (sclerophyllous), all with bilateral leaf symmetry. Mean values found were in the range of 0.268 to 0.573 W/m · °C for fresh leaves, and 0.540 to 0.548 W/m · °C for leaves infiltrated with water. An analysis of errors in the technique indicated that these values may be somewhat low. These results are several times higher than previously reported values. It is concluded that ordinary mesophytic and xerophytic leaves will not develop large gradients in temperature between the surfaces.
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References
Fried, E.: Thermal conduction contribution to heat transfer at contacts. In: Thermal conductivity, vol. 2, p. 253–275, Tye, R., ed. New York: Acad. Press 1969
Gale, J., Manes, A., Poljakoff-Mayber, A.: A rapidly equilibrating thermocouple contact thermometer for measurement of leaf-surface temperatures. Ecology 51, 521–525 (1970)
Moffat, R.: Uncertainty analysis. Stanford, Calif., USA: Thermosci. Measur. Ctr., Dep. of Mech. Eng., Stanford Univ. 1970
Perrier, A.: Contribution à l'étude des échanges thermiques en biologie végétale. Rev. gén. thermique (Paris) 79–80, 721–740 (1968)
Perrier, A.: Leaf Temperature Measurement In: Plant photosynthetic production, p. 632–671, Sestak, A., Catsky, J., Jarvis, P., eds.. The Hague: Junk 1971
Powell, R., Ho, C., Liley, P.: Thermal conductivity of selected materials. National Standard References Data Ser. NBS-8. Washington, D. C.: U.S. Nat. Bur. Standards 1966
Raschke, K.: Über die physikalischen Beziehungen zwischen Wärmeübergangzahl, Strahlungsaustausch, Temperatur und Transpiration eines Blattes. Planta (Berl.) 48, 200–238 (1956)
Schroder, J.: Apparatus for determining the thermal conductivity of solids in the temperature ranges from 20 to 200° C. Rev. sci. Instr. 34, 615–621 (1963)
Slatyer, R.: Effect of errors in measuring leaf temperature and ambient gas concentration on calculated resistances to CO2 and water vapor exchanges in plant leaves. Plant Physiol. 47, 269–274 (1971)
Turrell, J., Austin, S.: Thermal conductivity and mass in stems, leaves, and fruit in relation to frost resistance. Proc. 1st Internat. Citrus Symp., Riverside, Calif., USA, March 1968, vol. 2, p. 601–608, Riverside, Calif. USA: Dept. of Soil and Plant Nutr., Univ. of Calif. 1969
Turrell, J., Austin, S., McNee, D., Park, W.: Thermal conductivity of functional citrus tree wood. Plant Physiol. 42, 1025–1034 (1969)
Weast, R., ed. Handbook of Chemistry and Physics, 49th edn. Cleveland, O., USA: Chem. Rubber Co. 1968
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Hays, R.L. The thermal conductivity of leaves. Planta 125, 281–287 (1975). https://doi.org/10.1007/BF00385604
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DOI: https://doi.org/10.1007/BF00385604