Whole plant open chamber to measure gas exchange on herbaceous plants

Much of our understanding about CO2 and H2O gas exchange in plants has been gained from studies at leaf level. Extrapolation of results to whole plant is difficult and not always accurate. In order to overcome this limitation, a chamber was designed to measure gas exchange at the whole plant level....

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Autores principales:	Ferrari,Florencia Noemí, Parera,Carlos Alberto, Passera,Carlos Bernardo
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2016
Materias:	Carbon dioxide evaporation evapotrans-piration photosynthesis temperature
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000100013
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spelling	oai:scielo:S0718-583920160001000132018-10-01Whole plant open chamber to measure gas exchange on herbaceous plantsFerrari,Florencia NoemíParera,Carlos AlbertoPassera,Carlos Bernardo Carbon dioxide evaporation evapotrans-piration photosynthesis temperature Much of our understanding about CO2 and H2O gas exchange in plants has been gained from studies at leaf level. Extrapolation of results to whole plant is difficult and not always accurate. In order to overcome this limitation, a chamber was designed to measure gas exchange at the whole plant level. The chamber developed in this work consisted on an acrylic cylinder 0.70 m high and 0.60 m wide. An incorporated blower was used to circulate air through the chamber and plant canopy from the bottom inlet upwards to the outlet tube providing a maximum flow of 0.072 m³ s-1. Air CO2 and water concentration were monitored with an infrared gas analyzer and temperature gradients were measured periodically with sensors. Air flow rates inside the chamber were 0.007, 0.012, 0.022, 0.047, and 0.072 m³ s-1. A comparative study showed that 0.022 or 0.047 m³ s-1 air flow rates did not modify substantially the natural environment within the chamber; measurements are close to real and exterior ones; temperature increased below 4 °C; photosynthetically active radiation (PAR) was reduced by 5%; and photosynthesis and evapotranspiration showed mean values with nonsignificant variations (22 ± 3.8 μmol CO2 m-2 s-1, and 15 ± 4.0 mmol H2O m-2 s-1, respectively). This chamber could be a useful tool to measure gas exchange of whole plants in herbaceous species under conditions of high evapotranspiration and for extended periods of time.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.76 n.1 20162016-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000100013en10.4067/S0718-58392016000100013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Carbon dioxide evaporation evapotrans-piration photosynthesis temperature
spellingShingle	Carbon dioxide evaporation evapotrans-piration photosynthesis temperature Ferrari,Florencia Noemí Parera,Carlos Alberto Passera,Carlos Bernardo Whole plant open chamber to measure gas exchange on herbaceous plants
description	Much of our understanding about CO2 and H2O gas exchange in plants has been gained from studies at leaf level. Extrapolation of results to whole plant is difficult and not always accurate. In order to overcome this limitation, a chamber was designed to measure gas exchange at the whole plant level. The chamber developed in this work consisted on an acrylic cylinder 0.70 m high and 0.60 m wide. An incorporated blower was used to circulate air through the chamber and plant canopy from the bottom inlet upwards to the outlet tube providing a maximum flow of 0.072 m³ s-1. Air CO2 and water concentration were monitored with an infrared gas analyzer and temperature gradients were measured periodically with sensors. Air flow rates inside the chamber were 0.007, 0.012, 0.022, 0.047, and 0.072 m³ s-1. A comparative study showed that 0.022 or 0.047 m³ s-1 air flow rates did not modify substantially the natural environment within the chamber; measurements are close to real and exterior ones; temperature increased below 4 °C; photosynthetically active radiation (PAR) was reduced by 5%; and photosynthesis and evapotranspiration showed mean values with nonsignificant variations (22 ± 3.8 μmol CO2 m-2 s-1, and 15 ± 4.0 mmol H2O m-2 s-1, respectively). This chamber could be a useful tool to measure gas exchange of whole plants in herbaceous species under conditions of high evapotranspiration and for extended periods of time.
author	Ferrari,Florencia Noemí Parera,Carlos Alberto Passera,Carlos Bernardo
author_facet	Ferrari,Florencia Noemí Parera,Carlos Alberto Passera,Carlos Bernardo
author_sort	Ferrari,Florencia Noemí
title	Whole plant open chamber to measure gas exchange on herbaceous plants
title_short	Whole plant open chamber to measure gas exchange on herbaceous plants
title_full	Whole plant open chamber to measure gas exchange on herbaceous plants
title_fullStr	Whole plant open chamber to measure gas exchange on herbaceous plants
title_full_unstemmed	Whole plant open chamber to measure gas exchange on herbaceous plants
title_sort	whole plant open chamber to measure gas exchange on herbaceous plants
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000100013
work_keys_str_mv	AT ferrariflorencianoemi wholeplantopenchambertomeasuregasexchangeonherbaceousplants AT pareracarlosalberto wholeplantopenchambertomeasuregasexchangeonherbaceousplants AT passeracarlosbernardo wholeplantopenchambertomeasuregasexchangeonherbaceousplants
_version_	1714205356791431168

Whole plant open chamber to measure gas exchange on herbaceous plants

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