X. Experimental researches on vegetable assimilation and respiration.—No. I. On a new method for investigating the carbonic acid exchanges of plants

Author:

Abstract

For the methods employed up to the present for the determination of CO 2 in its physiological relations, Botany is indebted to all three classes of chemical analysis, to volumetric, gravimetric, and gasometric analysis. To the last belong those methods which have been of great value in giving the relation of O 2 and CO 2 exchange within a given time in either respiration or assimi­lation. These were the earliest used, and consist in placing a plant or part of a plant within a closed receiver containing a suitable mixture of gases and determining the exact composition of this before and after the experiment. From the reduced volumes, measured after absorption of the CO 2 by potash, and of the O by phosphorus, the quantities of either gas liberated or destroyed can be calculated. To De Saussure, Boussingault, Godlewski, and, above all, Pfeffer, we owe researches based on this method. The method has yielded valuable results in past times, but the corrections and actual analysis, according to the old standard methods of Bunsen, are lengthy and laborious, while in the modern procedure, simplification of operation is obtained somewhat at the expense of accuracy. The whole method is open to the physiological objections to the use of a closed chamber, and to the continuous, and in a lengthy experiment often considerable, variations of composition which the contained gas must undergo. Nor is it adapted to yield a series of connected results.

Publisher

The Royal Society

Subject

General Engineering

Cited by 9 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Tansley Review No. 36 Excited leaves;New Phytologist;1992-07

2. Automated measurement of leaf photosynthetic O 2 evolution as a function of photon flux density;Philosophical Transactions of the Royal Society of London. B, Biological Sciences;1989-04-12

3. The Measurement of Rate of Photosynthesis as a Function of Photon Flux Density and the Significance and Implication of These Measurements;Techniques and New Developments in Photosynthesis Research;1989

4. Landpflanzen;Die CO2-Assimilation / The Assimilation of Carbon Dioxide;1960

5. Das Kohlendioxyd;Die CO2-Assimilation / The Assimilation of Carbon Dioxide;1960

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