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Publication Type J
Authors Carter, JL; Veneklaas, EJ; Colmer, TD; Eastham, J; Hatton, TJ
Author Full Name Carter, Jennifer L.; Veneklaas, Erik J.; Colmer, Timothy D.; Eastham, Judy; Hatton, Thomas J.
Title Contrasting water relations of three coastal tree species with different exposure to salinity
Source PHYSIOLOGIA PLANTARUM
Language English
Document Type Review
Keywords Plus GAS-EXCHANGE; PROLINE ANALOGS; SALT TOLERANCE; AVICENNIA-MARINA; BANKSIA WOODLAND; ORGANIC SOLUTES; STRESS; GROWTH; PLANTS; PRESSURE
Abstract This field study examined the ecophysiological responses of three tree species to salinity in the Austin Bay Nature Reserve, adjacent to the Peel-Harvey Estuary in Western Australia (115 degrees 46' E 32 degrees 37' S). The area is at increased risk of flooding with saline water during storm surges due to the construction of a channel between the estuary and Indian Ocean in 1994. Banksia attenuata R.Br. occurs on small sandy ridges adjacent to a seasonal wetland, while Melaleuca cuticularis Labill. and Casuarina obesa Miq. occur in a seasonally flooded wetland. Landscape position determined exposure to salinity, with M. cuticularis and C. obesa experiencing high soil and groundwater salinity during summer (electrical conductivity, EC, up to 70 dS m(-1)) while B. attenuata was not exposed to soil or groundwater with EC greater than 20 dS m(-1). B. attenuata had relatively stable leaf water status throughout the year and did not osmotically adjust as root-zone salinity increased. By contrast, M. cuticularis and C. obesa had large variation in stem water potential and exhibited osmotic adjustment during summer. Whereas the sap flow rates of M. cuticularis and C. obesa remained high throughout the year, sap flow of B. attenuata decreased during summer which may have limited uptake of salt. The three species also exhibited differences in traits associated with tissue-level salt tolerance, as M. cuticularis and C. obesa produced compatible organic solutes (methyl proline in M. cuticularis and proline in C. obesa), whereas B. attenuata did not. The distributions of these species within the Austin Bay Nature Reserve are determined in part by their tolerance to salinity, which will influence their responses to hydrological disturbance.
Author Address Univ Western Australia, Fac Nat & Agr Sci, Sch Plant Biol, Crawley, WA 6009, Australia; CSIRO Land & Water, Wembley, WA 6913, Australia
Reprint Address Carter, JL (reprint author), CSIRO, Ensis Environm, POB 5, Wembley, WA 6913, Australia.
E-mail Address jennifer.carter@ensisjv.com
ResearcherID Number Veneklaas, Erik/C-8907-2009; Colmer, Timothy/A-9994-2011; Carter, Jenny/D-7205-2011
ORCID Number Veneklaas, Erik/0000-0002-7030-4056; Colmer, Timothy/0000-0002-3383-9596;
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Cited Reference Count 70
Times Cited 15
Total Times Cited Count (WoS, BCI, and CSCD) 15
Publisher BLACKWELL PUBLISHING
Publisher City OXFORD
Publisher Address 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
ISSN 0031-9317
29-Character Source Abbreviation PHYSIOL PLANTARUM
ISO Source Abbreviation Physiol. Plant.
Publication Date JUL
Year Published 2006
Volume 127
Issue 3
Beginning Page 360
Ending Page 373
Digital Object Identifier (DOI) 10.1111/j.1399-3054.2005.00633.x
Page Count 14
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 069ES
Unique Article Identifier WOS:000239429800004
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