Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer

Martínez-Ferri, E.; Balaguer, L.; Valladares Ros, Fernando; Chico, J.M.; Manrique, Esteban; Comisión Interministerial de Ciencia y Tecnología, CICYT (España)

Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer

8 páginas, 6 figuras . En la sección "Acknowledgments" se incluye la siguiente mención "The authors are grateful to I. Barrera, M. Gil, A. Lobillo, J. Navarro, M.E. Orejas, A. Pintado, B. Rábago, E. Seriñá and E. Zuazua for their hard work at the field site and for their helpful comments."

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Bibliographic Details
Main Authors:	Martínez-Ferri, E., Balaguer, L., Valladares Ros, Fernando, Chico, J.M., Manrique, Esteban
Other Authors:	Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
Format:	artículo biblioteca
Language:	English
Published:	Heron Publishing 2000-01
Subjects:	Chlorophyll fluorescence, Juniperus phoenicea, Midday depression, Pinus halepensis, Photo-protection, Quercus coccifera, Quercus ilex, Xanthophyll cycle,
Online Access:	http://hdl.handle.net/10261/131131 http://dx.doi.org/10.13039/501100007273
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id	dig-ccma-es-10261-131131
record_format	koha
spelling	dig-ccma-es-10261-1311312019-08-06T09:08:43Z Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer Martínez-Ferri, E. Balaguer, L. Valladares Ros, Fernando Chico, J.M. Manrique, Esteban Comisión Interministerial de Ciencia y Tecnología, CICYT (España) Chlorophyll fluorescence Juniperus phoenicea Midday depression Pinus halepensis Photo-protection Quercus coccifera Quercus ilex Xanthophyll cycle 8 páginas, 6 figuras . En la sección "Acknowledgments" se incluye la siguiente mención "The authors are grateful to I. Barrera, M. Gil, A. Lobillo, J. Navarro, M.E. Orejas, A. Pintado, B. Rábago, E. Seriñá and E. Zuazua for their hard work at the field site and for their helpful comments." Photosynthetic performance was monitored during two consecutive summers in four co-occurring evergreen Mediterranean tree species growing on a south-facing rocky slope. In response to midday water stress, the drought-avoiding species Pinus halepensis Mill. exhibited marked stomatal closure (gs) but no changes in stem water potential (Ψs), whereas the drought-tolerant species Quercus coccifera L., Q. ilex ssp. ballota (Desf.) Samp. and Juniperus phoenicea L. displayed declines in midday gs and Ψs. The higher resistance to CO2 influx in needles of P. halepensis compared with the other species did not result in either a proportional increase in non-radiative dissipation of excess energy or photo-inactivation of photosystem II (PSII). No significant differences were found among species either in the de-epoxidation state of the xanthophyll cycle (DPS) or in the pool of its components on a total chlorophyll basis (VAZ). Despite contrasting midday assimilation rates, the three drought-tolerant species all exhibited a pronounced drop in photochemical efficiency at midday that was characterized by a decrease in the excitation capture efficiency of the open PSII centers. Although photoinhibition was not fully reversed before dawn, it apparently did not result in cumulative photo-damage. Thus, the drought-avoiding and drought-tolerant species employed different mechanisms for coping with excess light during the midday depression in photosynthesis that involved contrasting midday photochemical efficiencies of PSII and different degrees of dynamic photoinhibition as a photo-protective mechanism. These behaviors may be related to the different mechanisms employed by drought-avoiding and drought-tolerant species to withstand water deficit. This research was supported by a research grant from CICYT (CLI95-1902). Peer reviewed 2016-04-15T11:23:28Z 2016-04-15T11:23:28Z 2000-01 artículo http://purl.org/coar/resource_type/c_6501 Tree Physiology 20: 131-138 (2000) 0829-318X http://hdl.handle.net/10261/131131 10.1093/treephys/20.2.131 1758-4469 http://dx.doi.org/10.13039/501100007273 en http://dx.doi.org/10.1093/treephys/20.2.131 Sí open Heron Publishing
institution	CCMA ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-ccma-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del CCMA España
language	English
topic	Chlorophyll fluorescence Juniperus phoenicea Midday depression Pinus halepensis Photo-protection Quercus coccifera Quercus ilex Xanthophyll cycle Chlorophyll fluorescence Juniperus phoenicea Midday depression Pinus halepensis Photo-protection Quercus coccifera Quercus ilex Xanthophyll cycle
spellingShingle	Chlorophyll fluorescence Juniperus phoenicea Midday depression Pinus halepensis Photo-protection Quercus coccifera Quercus ilex Xanthophyll cycle Chlorophyll fluorescence Juniperus phoenicea Midday depression Pinus halepensis Photo-protection Quercus coccifera Quercus ilex Xanthophyll cycle Martínez-Ferri, E. Balaguer, L. Valladares Ros, Fernando Chico, J.M. Manrique, Esteban Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer
description	8 páginas, 6 figuras . En la sección "Acknowledgments" se incluye la siguiente mención "The authors are grateful to I. Barrera, M. Gil, A. Lobillo, J. Navarro, M.E. Orejas, A. Pintado, B. Rábago, E. Seriñá and E. Zuazua for their hard work at the field site and for their helpful comments."
author2	Comisión Interministerial de Ciencia y Tecnología, CICYT (España)
author_facet	Comisión Interministerial de Ciencia y Tecnología, CICYT (España) Martínez-Ferri, E. Balaguer, L. Valladares Ros, Fernando Chico, J.M. Manrique, Esteban
format	artículo
topic_facet	Chlorophyll fluorescence Juniperus phoenicea Midday depression Pinus halepensis Photo-protection Quercus coccifera Quercus ilex Xanthophyll cycle
author	Martínez-Ferri, E. Balaguer, L. Valladares Ros, Fernando Chico, J.M. Manrique, Esteban
author_sort	Martínez-Ferri, E.
title	Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer
title_short	Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer
title_full	Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer
title_fullStr	Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer
title_full_unstemmed	Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer
title_sort	energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the mediterranean summer
publisher	Heron Publishing
publishDate	2000-01
url	http://hdl.handle.net/10261/131131 http://dx.doi.org/10.13039/501100007273
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Energy dissipation in drought-avoiding and drought-tolerant tree species at midday during the Mediterranean summer

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