A portable steady-state porometer for measuring the carbon dioxide and water vapour exchanges of leaves under natural conditions
- 334 Downloads
A portable porometer is described for measuring the steady-state CO2 and H2O exchange rates of leaves under natural conditions. The porometer has an open gas exchange system which monitors the differences in concentrations of CO2 and H2O entering and leaving a cuvette which is clamped on or around leaves. The cuvette is designed to maintain ambient air temperature and humidity around the leaf. This instrument may also be used to determine CO2 response curves in the field. Examples of diurnal courses are presented for attached leaves of different species having high and low rates of CO2 exchange.
KeywordsCarbon Dioxide Water Vapour Exchange Rate Natural Condition Response Curve
Unable to display preview. Download preview PDF.
- Raschke K (1979) Movements of stomata. In: Haupt W, Feinleib ME (eds) Physiology of movements. Encyclopedia Plant Physiology. Springer Berlin Heidelberg New York, Vol. 7. pp. 383–441Google Scholar
- Schulze ED, Hall AE (1982) Stomatal responses, water loss and CO2 assimilation rates of plants in contrasting environments. In: Lange OL, Nobel PS, Osmond CB, Ziegler H (eds) Physiological Plant Ecology II. Encyclopedia of Plant Physiology Vol. 12B. Springer Berlin Heidelberg New York, in pressGoogle Scholar
- Schulze ED, Lange OL, Lembke G (1972) A digital registration system for net photosynthesis and transpiration measurements in the field and an associated analysis of errors. Oecologia 10:151–166Google Scholar
- Slavik B (1974) Methods of studying plant water relations. Ecological Studies 9. Springer Berlin Heidelberg New York, 449 pp.Google Scholar