Because of the advent of portable gas exchange equipment, measuring foliar gas exchange (photosynthesis, respiration, and transpiration) has become popular in a wide range of disciplinary domains. Closed, semi-closed, and open systems are the three most frequent types of portable gas exchange systems. Modern devices are simple to operate and do not require the operator to calibrate them. Some devices can generate photosynthetic response curves to light and carbon dioxide automatically. The ease of use and enhanced capabilities of gas exchange instruments have significantly increased user confidence and the utilisation of gas exchange measurements in field studies and enclosed environment research. Errors in measurement and calculation are still conceivable. For example, one article published in a peer-reviewed journal revealed net photosynthetic rates with intercellular CO2 concentrations higher than the ambient CO2 concentration at the time of observation. Erroneous measurements have been discovered in my lab, notably by novice students. Faulty equipment, ineffective methods, leaking leaf chambers, leaking or clogged gas lines, and unsuitable measuring circumstances can all lead to errors. Errors can also occur if measurements for different treatments in the same study are obtained in the wrong sequence or at the wrong time. Furthermore, even when researching the same species, data from different studies may not be comparable due to differences in measuring methodologies or the bases on which results are expressed (e.g., projected, hemi-surface and total surface leaf area). I'll go over certain areas of foliar gas exchange measurements that are either perplexing or demand special attention in this paper, including different types of devices and their advantages and disadvantages.
Author(S) Details
Qing-Lai Dang
Faculty of Natural Resources Management, Lakehead University, Thunder Bay, Ontario, P7B 5E1, Canada.
View Book:- https://stm.bookpi.org/RPPSR-V3/article/view/4478
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