Loading content, please wait..
loading..
Logo
Version 3.22
or
Authors Katuwal, KB; Xiao, B; Jespersen, D
Author Full Name Katuwal, Krishna B.; Xiao, Bo; Jespersen, David
Title Root physiological and biochemical responses of seashore paspalum and centipedegrass exposed to iso-osmotic salt and drought stresses
Source CROP SCIENCE
Language English
Document Type Article
Keywords Plus ANTIOXIDANT ENZYME-ACTIVITY; OSMOTIC ADJUSTMENT; SUPEROXIDE-DISMUTASE; SALINITY TOLERANCE; LIPID-PEROXIDATION; GROWTH-RESPONSES; WATER RELATIONS; SEASON GRASSES; ACCUMULATION; MAIZE
Abstract Drought and salt are two major stresses of turfgrass. Both damage the plant root system by disrupting osmotic balance at the root-soil interface. The objectives of our hydroponic experiments were to understand root physiological and biochemical responses in two turfgrass species (seashore paspalum [Paspalum vaginatum Swartz] and centipedegrass [Eremochloa ophiuroides (Munro) Hack.]) with distinct salinity tolerance exposed to iso-osmotic drought and salt stresses. Two seashore paspalum genotypes, 'Seastar' and 'UGP113', and a centipedegrass genotype, 'TifBlair', were exposed to three treatments: control, salt stress (-0.4 MPa by adding NaCl), and drought stress (-0.4 MPa by adding polyethylene glycol). Although equal in osmotic potential, drought stress damage was more evident compared with salt stress in terms of lipid peroxidation and decreased root viability in all three turfgrass genotypes. Salt stress reduced root viability only in the centipedegrass genotype, indicating ion toxicity effects in this turfgrass genotype. Seashore paspalum genotypes had greater total accumulation of Na+ and K+ for greater root osmotic adjustment than centipedegrass under salt stress. Seashore paspalum genotypes also had greater activities of root antioxidant enzymes such as superoxide dismutase, peroxidase, and glutathione reductase compared with centipedegrass under salt stress. In contrast, centipedegrass had greater total accumulation of total soluble sugar and proline for greater osmotic adjustment compared with seashore paspalum genotypes under drought stress. Despite greater accumulation of organic osmolytes, activities of superoxide dismutase, catalase, peroxidase, and glutathione reductase in centipedegrass were either lower or similar to those in seashore paspalum genotypes, and therefore centipedegrass accumulated similar oxidative damage as seashore paspalum genotypes under drought stress.
Author Address [Katuwal, Krishna B.; Jespersen, David] Univ Georgia, Dept Crop & Soil Sci, Griffin, GA 30223 USA; [Xiao, Bo] Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Peoples R China
Reprint Address Jespersen, D (corresponding author), Univ Georgia, Dept Crop & Soil Sci, Griffin, GA 30223 USA.
E-mail Address djesper@uga.edu
Funding Agency and Grant Number University of Georgia Research Foundation
Funding Text University of Georgia Research Foundation
Publisher WILEY
Publisher City HOBOKEN
Publisher Address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
ISSN 0011-183X
29-Character Source Abbreviation CROP SCI
ISO Source Abbreviation Crop Sci.
Publication Date MAR-APR
Year Published 2020
Volume 60
Issue 2
Beginning Page 1077
Ending Page 1089
Digital Object Identifier (DOI) 10.1002/csc2.20029
Page Count 13
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number LY4OZ
Unique Article Identifier WOS:000540510200045
Plants associated with this reference

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021. This database is based on an earlier work by James Aronson.
THIS WEBSITE AND THIS DATABASE ARE PROVIDED ON AN "AS IS" BASIS, AND YOU USE THEM AND RELY ON THEM AT YOUR OWN RISK.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed