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Authors Chavarria, M; Wherley, B; Jessup, R; Chandra, A
Author Full Name Chavarria, Manuel; Wherley, Benjamin; Jessup, Russell; Chandra, Ambika
Title Physiological responses to salinity among warm-season turfgrasses of contrasting salinity tolerance
Source JOURNAL OF AGRONOMY AND CROP SCIENCE
Language English
Document Type Article
Author Keywords bermudagrass; seashore paspalum; St Augustinegrass; zoysiagrass
Keywords Plus WATER; IRRIGATION; GROWTH; STRESS
Abstract There is increasing need to understand physiological mechanisms of warm-season turfgrass species for potential use in salt-affected soils due to increased use of recycled water for irrigation in arid and semi-arid regions. Greenhouse screenings previously conducted during 2014 and 2015 at Texas A&M University, College Station, TX, and determined relative salinity tolerance among 45 experimental genotypes representing four warm-season turfgrass species under salinity levels ranging from 2.5 to 45 dS m(-1). From that study, eight genotypes (two genotypes representing the highest and lowest relative salinity tolerance from each of four species) were advanced for additional evaluations aimed at characterizing physiological responses to salinity in this study. Genotypes included 'Celebration(R)' and 'UGB79' bermudagrass (Cynodon spp.), 'DALZ1313' and 'Zeon' zoysiagrass (Zoysia spp.), 'UGP3' and 'UGP38' seashore paspalum (Paspalum vaginatum), and 'Floratam' and 'Palmetto' St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze]. Grasses were grown in the greenhouse and sub-irrigated daily for 4 weeks at salinity levels of 2.5, 15 and 30 dS m(-1). Responses including visual turf quality, shoot growth rates, salt excretion rates, root and shoot tissue nutrient concentrations, as well as root and shoot Na:K were characterized. Results showed that all grasses adjusted osmotically under increasing salinity levels. However, differences in Na:K were noted among species, with bermudagrass and seashore paspalum genotypes maintaining proportionally lower Na:K in roots and shoots than zoysiagrass and St. Augustinegrass under salinity stress. Salt excretion rates also increased at increasing salinity in zoysiagrass and bermudagrass, with greater salt excretion observed in the salinity-tolerant genotypes of each species. The results demonstrate that salt tolerance is complex, and show a variety of salt tolerance mechanisms are employed by these warm-season species.
Author Address [Chavarria, Manuel] Univ Florida, Agron Dept, Gainesville, FL 32611 USA; [Wherley, Benjamin; Jessup, Russell] Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843 USA; [Chandra, Ambika] Texas A&M AgriLife Res Ctr, Dallas, TX USA
Reprint Address Chavarria, M (corresponding author), Univ Florida, Agron Dept, Gainesville, FL 32611 USA.
E-mail Address chavarriasmanuel@ufl.edu; b-wherleR@tamu.edu; rjessup@tamu.edu; Ambika.Chandra@ag.tamu.edu
Funding Agency and Grant Number United States Department of Agriculture-National Institute for Food and Agriculture Specialty Crops Research Initiative [2010-51181-21064]
Funding Text This work was funded through support from the United States Department of Agriculture-National Institute for Food and Agriculture Specialty Crops Research Initiative under award no. 2010-51181-21064.
Publisher WILEY
Publisher City HOBOKEN
Publisher Address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
ISSN 0931-2250
29-Character Source Abbreviation J AGRON CROP SCI
ISO Source Abbreviation J. Agron. Crop Sci.
Publication Date AUG
Year Published 2021
Volume 207
Issue 4
Beginning Page 669
Ending Page 678
Digital Object Identifier (DOI) 10.1111/jac.12501
Page Count 10
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number TO4SR
Unique Article Identifier WOS:000648923700001
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