Biologia plantarum 6:79-83, 1964 | DOI: 10.1007/BF02926660
Conductometric apparatus for determining photosynthesic rate
- 1 V. L. Komarov Institute of Botany, Academy of Sciences of the U.S.S.R., Leningrad 22, USSR
A conductometric apparatus for determining the photosynthetic rate suitable predominantly for field measurements is described. In contrast with the hitherto described and applied instruments 3 samples of air can be analyzed here simultaneously, the data are temperature-independent and the entire electronic part of the apparatus is transistorized. The absorbers (300×30×30mm.) and the leaf chambers (140×100×10 mm.) are made of plexiglass. The membrane pump is hand-operated by means of a crank. The conductivity of the absorption solution (0.02N-KOH+0.5% isoamylalcohol+saponin) is measured in a special measuring cell into which the solution is transferred from the individual absorbers. The error of the photosynthetic rate determination is about 10-20% of the value obtained for intensities of 10-20 mg. CO2 dm.-2h.-1.
Received: December 28, 1962; Published: June 1, 1964 Show citation
References
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