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Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress
Plants respond to many environmental changes by rapidly adjusting their hydraulic conductivity and transpiration rate, thereby optimizing water-use efficiency and preventing damage due to low water potential. A multiple-load-cell apparatus, time-series analysis of the measured data, and residual low...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2010
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2905204/ https://www.ncbi.nlm.nih.gov/pubmed/20558570 http://dx.doi.org/10.1093/jxb/erq168 |
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author | Wallach, Rony Da-Costa, Noam Raviv, Michael Moshelion, Menachem |
author_facet | Wallach, Rony Da-Costa, Noam Raviv, Michael Moshelion, Menachem |
author_sort | Wallach, Rony |
collection | PubMed |
description | Plants respond to many environmental changes by rapidly adjusting their hydraulic conductivity and transpiration rate, thereby optimizing water-use efficiency and preventing damage due to low water potential. A multiple-load-cell apparatus, time-series analysis of the measured data, and residual low-pass filtering methods were used to monitor continuously and analyse transpiration of potted tomato plants (Solanum lycopersicum cv. Ailsa Craig) grown in a temperature-controlled greenhouse during well-irrigated and drought periods. A time derivative of the filtered residual time series yielded oscillatory behaviour of the whole plant's transpiration (WPT) rate. A subsequent cross-correlation analysis between the WPT oscillatory pattern and wet-wick evaporation rates (vertical cotton fabric, 0.14 m(2) partly submerged in water in a container placed on an adjacent load cell) revealed that autonomous oscillations in WPT rate develop under a continuous increase in water stress, whereas these oscillations correspond with the fluctuations in evaporation rate when water is fully available. The relative amplitude of these autonomous oscillations increased with water stress as transpiration rate decreased. These results support the recent finding that an increase in xylem tension triggers hydraulic signals that spread instantaneously via the plant vascular system and control leaf conductance. The regulatory role of synchronized oscillations in WPT rate in eliminating critical xylem tension points and preventing embolism is discussed. |
format | Text |
id | pubmed-2905204 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-29052042010-07-22 Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress Wallach, Rony Da-Costa, Noam Raviv, Michael Moshelion, Menachem J Exp Bot Research Papers Plants respond to many environmental changes by rapidly adjusting their hydraulic conductivity and transpiration rate, thereby optimizing water-use efficiency and preventing damage due to low water potential. A multiple-load-cell apparatus, time-series analysis of the measured data, and residual low-pass filtering methods were used to monitor continuously and analyse transpiration of potted tomato plants (Solanum lycopersicum cv. Ailsa Craig) grown in a temperature-controlled greenhouse during well-irrigated and drought periods. A time derivative of the filtered residual time series yielded oscillatory behaviour of the whole plant's transpiration (WPT) rate. A subsequent cross-correlation analysis between the WPT oscillatory pattern and wet-wick evaporation rates (vertical cotton fabric, 0.14 m(2) partly submerged in water in a container placed on an adjacent load cell) revealed that autonomous oscillations in WPT rate develop under a continuous increase in water stress, whereas these oscillations correspond with the fluctuations in evaporation rate when water is fully available. The relative amplitude of these autonomous oscillations increased with water stress as transpiration rate decreased. These results support the recent finding that an increase in xylem tension triggers hydraulic signals that spread instantaneously via the plant vascular system and control leaf conductance. The regulatory role of synchronized oscillations in WPT rate in eliminating critical xylem tension points and preventing embolism is discussed. Oxford University Press 2010-07 2010-06-17 /pmc/articles/PMC2905204/ /pubmed/20558570 http://dx.doi.org/10.1093/jxb/erq168 Text en © 2010 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details) |
spellingShingle | Research Papers Wallach, Rony Da-Costa, Noam Raviv, Michael Moshelion, Menachem Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
title | Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
title_full | Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
title_fullStr | Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
title_full_unstemmed | Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
title_short | Development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
title_sort | development of synchronized, autonomous, and self-regulated oscillations in transpiration rate of a whole tomato plant under water stress |
topic | Research Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2905204/ https://www.ncbi.nlm.nih.gov/pubmed/20558570 http://dx.doi.org/10.1093/jxb/erq168 |
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