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Publication Type J
Authors Marcum, KB; Anderson, SJ; Engelke, MC
Author Full Name Marcum, KB; Anderson, SJ; Engelke, MC
Title Salt gland ion secretion: A salinity tolerance mechanism among five zoysiagrass species
Source CROP SCIENCE
Language English
Document Type Article
Keywords Plus TURFGRASSES
Abstract Need for salinity tolerant turfgrasses is increasing because of government mandates requiring use of low quality secondary water sources for turfgrass irrigation, This study was done to elucidate salinity tolerance mechanisms of the Zoysia genus (zoysiagrass), which includes a number of important turfgrasses. Research objectives were to (i) determine the range in salinity tolerance among and within five zoysiagrass species, (ii) determine if salt secretion via Leaf salt glands is an important salinity tolerance mechanism within the Zoysia genus, and (iii) determine if salinity tolerance is associated with the rate, or efficiency of leaf salt gland secretion. Fifty-seven zoysiagrass accessions and cultivars, representing five interfertile species, were grown in hydroponic tanks in a glasshouse. Salinity of treatment tanks was gradually raised prior to data collection to a final treatment Level of 400 mM NoCl. Relative salinity tolerance was determined by changes in percent leaf firing and percent leaf dry weight relative to control plants. Relative percent leaf firing varied from 19 to 80% among entries, indicating a wide range in relative salinity tolerance, Bicellular leaf salt glands were observed in all species, lying recumbent to the leaf surface in parallel ro cvs atop intercostal ridges, Relative salinity tolerance was negatively correlated with leaf sap Na+ concentration and positively correlated with leaf salt gland Na+ secretion rate and leaf gland density. This indicates that salinity tolerance in the Zoysia genus is associated with shoot saline ion exclusion vis leaf salt gland secretion, which, in turn, is related to leaf salt gland density.
Author Address Univ Arizona, Dept Plant Sci, Tucson, AZ 85721 USA; Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843 USA; Texas A&M Univ, Res & Extens Ctr, Dallas, TX 75252 USA
Reprint Address Marcum, KB (reprint author), Univ Arizona, Dept Plant Sci, POB 210036, Tucson, AZ 85721 USA.
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Cited Reference Count 25
Times Cited 69
Total Times Cited Count (WoS, BCI, and CSCD) 106
Publisher CROP SCIENCE SOC AMER
Publisher City MADISON
Publisher Address 677 S SEGOE ROAD, MADISON, WI 53711 USA
ISSN 0011-183X
29-Character Source Abbreviation CROP SCI
ISO Source Abbreviation Crop Sci.
Publication Date MAY-JUN
Year Published 1998
Volume 38
Issue 3
Beginning Page 806
Ending Page 810
Page Count 5
Web of Science Category Agronomy
Subject Category Agriculture
Document Delivery Number ZZ668
Unique Article Identifier WOS:000074754600030
Plants associated with this reference

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