Reduction of evaporative flux in bean leaves due to chitosan treatment assessed by infrared thermography |
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| Authors: | N Ludwig R Cabrini F Faoro M Gargano S Gomarasca M Iriti V Picchi C Soave |
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| Institution: | 1. Dipartimento di Fisica, State University of Milan, via Celoria 16, 20133 Milano, Italy;2. Dipartimento di Biologia, State University of Milan, via Celoria 20, 20133 Milano, Italy;3. Dipartimento di Produzione Vegetale, State University of Milan, via Celoria 2, 20133 Milano, Italy;4. Istituto di Virologia Vegetale – CNR, Italy;1. State Key Laboratory Incubation Base of Urban Environmental Processes and Digital Simulation, Capital Normal University, Beijing, China;2. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China;3. Beijing Key Laboratory of Resource Environment and Geographic Information System, Capital Normal University, Beijing, China;1. Department of Physics, Faculty of Natural Sciences, University of Shkodra, Shkoder, Albania;2. Institute of Geophysics, University of Warsaw, Warsaw, Poland;1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Northwest Agriculture & Forestry University, Yangling 712100, China;4. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China;1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, PR China;2. State Key Laboratory of Robotics and System (HIT), Harbin 150001, PR China;3. School of Electrical Engineering & Automation, Harbin Institute of Technology, Harbin 150001, PR China |
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| Abstract: | Infrared thermography can be used as a tool for evaluating antitranspirant treatment through the measurement of evaporative fluxes. The aim of this work is to compare the leaf surface temperatures of plant treated with chitosan (CHT), a potential stomatal-closing antitranspirant, with temperatures of leaves treated with the commercially available antitranspirant Vapor Gard®, a film-forming polyterpene. The main problem in the correct evaluation of stomatal conductance at leaf level is due to the need of performing a measurement in a completely non-invasive method. The main advantage of thermographic method is the possibility to acquire information about instantaneous conditions of transpiration over a large number of plants, with no need of sampling and avoiding any contact with plants.Tests on bean plants (Phaseolus vulgaris) showed the applicability of the thermal imaging to discriminate plants with different evaporation rate due to treatment with different antitranspirant compounds. Quantitative evaluation of evaporative flux and stomatal conductance was obtained through reference measurements on standards with calibrated conductance. Non-destructive gravimetric measurements were used in order to get a reliable evaluation of evaporative fluxes. In conclusion, thermographic approach, in climatic chamber, seems to be a valid tool for rapidly screening the performance of different antitranspirant products. |
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