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Publication Type J
Authors Sandoval-Gil, JM; Barrote, I; Silva, J; Olive, I; Costa, MM; Ruiz, JM; Marin-Guirao, L; Sanchez-Lizaso, JL; Santos, R
Author Full Name Sandoval-Gil, Jose M.; Barrote, Isabel; Silva, Joao; Olive, Irene; Costa, Monya M.; Ruiz, Juan M.; Marin-Guirao, Lazaro; Sanchez-Lizaso, Jose L.; Santos, Rui
Title Plant-water relations of intertidal and subtidal seagrasses
Source MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE
Language English
Document Type Article
Author Keywords Desiccation stress; emersion; ion homeostasis; osmolyte; osmoregulation; seagrass
Keywords Plus ZOSTERA-NOLTII HORNEM; CYMODOCEA-NODOSA; SALT TOLERANCE; VERTICAL-DISTRIBUTION; POSIDONIA-AUSTRALIS; MARINE ANGIOSPERMS; CONTENT COMPONENTS; TURGOR PRESSURE; ION HOMEOSTASIS; 2 MORPHOTYPES
Abstract This work represents the first contribution to (i) examine the changes in plant-water relations of an inter-tidal seagrass during air exposure (Zostera noltii), and (ii) compare the water status descriptors between inter-tidal- and subtidal-adapted species (Cymodocea nodosa, Zostera marina). Two different morphotypes of Z. noltii that develop in the highest and lowest inter-tidal levels in the Portuguese lagoon of Ria Formosa were exposed to natural emersion periods under laboratory conditions, and the evolution of leaf water relations and osmolytes (ions, proline and non-structural carbohydrates) was measured. Both morphotypes regulated their water potential (Psi(w)) by reducing the osmotic potential (Psi(pi)) through osmolyte accumulation, but only high inter-tidal plants were able to do this by adjusting the turgor pressure through cell wall hardening. This is a conservative mechanism for osmotic acclimation, which occurred only after long emersion periods (7 h). After a rapid increase in ion concentration under air exposure, the high inter-tidal morphotype replaced them by more physiologically compatible solutes (proline and non-structural carbohydrates) to maintain the osmotic adjustment. Altered ionic homeostasis was found in low inter-tidal plants when exposed to such unnatural, long emersion periods. Osmotic unbalances were also observed during the submerged recovery phase. Descriptors of leaf pressure-volume (P-V) curves and Hofler diagrams were derived for seagrasses for the first time. They support the divergences in water relations observed between inter-tidal and subtidal seagrasses according to their vertical distribution. More negative water and osmotic potentials and higher rigidity of cell walls (higher elastic modulus, epsilon) were found to be specific osmotic adaptations of seagrasses to the inter-tidal.
Author Address [Sandoval-Gil, Jose M.; Ruiz, Juan M.; Marin-Guirao, Lazaro] Spanish Inst Oceanog, Seagrass Ecol Grp, Murcia 30740, Spain; [Sandoval-Gil, Jose M.; Sanchez-Lizaso, Jose L.] Univ Alicante, Dept Marine Sci & Appl Biol, E-03080 Alicante, Spain; [Barrote, Isabel; Silva, Joao; Olive, Irene; Costa, Monya M.; Santos, Rui] Univ Algarve, Ctr Marine Sci, ALGAE Marine Plant Ecol Res Grp, Faro, Portugal
Reprint Address Sandoval-Gil, JM (reprint author), Spanish Inst Oceanog, Seagrass Ecol Grp, C Varadero S-N, Murcia 30740, Spain.
E-mail Address jmsandovalgil@gmail.com
ResearcherID Number Olive, Irene/J-3922-2013; Sanchez Lizaso, Jose Luis/J-4939-2017
ORCID Number Olive, Irene/0000-0002-4865-923X; Sanchez Lizaso, Jose Luis/0000-0002-3927-5699; Santos, Rui/0000-0002-7861-4366; Silva, Joao/0000-0002-7211-1661
Funding Agency and Grant Number COST Action; University of Alicante (Department of Marine Sciences and Applied Biology); National Plan of Scientific Research of the Spanish Government [CTM2009-08413MAR]; Fundacao para a Ciencia e a Tecnologia (FCT) [SFRH/BPD/71129/2010]
Funding Text This research was accomplished within the framework of the European Cooperation in Science and Technology (COST) Action ES0906 'Seagrass productivity from genes to ecosystem management'. A Short Term Scientific Mission (STSM) grant from the COST Action and a grant from the University of Alicante (Department of Marine Sciences and Applied Biology) were awarded to J. M. Sandoval-Gil. The OSMOGRASS II project (ref. no. CTM2009-08413MAR) funded by the National Plan of Scientific Research of the Spanish Government also supported this research. A Fundacao para a Ciencia e a Tecnologia (FCT) post-doctoral fellowship SFRH/BPD/71129/2010 was awarded to I. Olive. The authors are especially grateful to Silvia Albano and Bruno Fragoso from the ALGAE group and the Instituto Espanol de Oceanografia (IEO) technician Rocio Garcia Munoz for their invaluable field and laboratory logistical support.
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Cited Reference Count 92
Times Cited 1
Total Times Cited Count (WoS, BCI, and CSCD) 1
Publisher WILEY-BLACKWELL
Publisher City HOBOKEN
Publisher Address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
ISSN 0173-9565
29-Character Source Abbreviation MAR ECOL-EVOL PERSP
ISO Source Abbreviation Mar. Ecol.-Evol. Persp.
Publication Date DEC
Year Published 2015
Volume 36
Issue 4
Beginning Page 1294
Ending Page 1310
Digital Object Identifier (DOI) 10.1111/maec.12230
Page Count 17
Web of Science Category Marine & Freshwater Biology
Subject Category Marine & Freshwater Biology
Document Delivery Number CZ9CR
Unique Article Identifier WOS:000367395900035
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