Growth response of four turfgrass species to salinity
Introduction
Soil salinity is considered as one of the major factors that reduce plant growth in many regions in the world. In a number of western states, fresh water shortage has resulted in restrictions on the use of potable water for landscape irrigation. Consequently, secondary water sources are increasingly being used to irrigate large turf facilities (ADWR, 1995, CSWRCB, 1993). Seawater intrusion in the coastal states (McCarty and Dudeck, 1993, Murdoch, 1987) and the use of salt for deicing roadways of the northern USA (Hanes et al., 1970) have added to the salinity problems in turfgrass culture. Therefore, the need for salt tolerant turfgrasses has increased (Harivandi et al., 1992).
The detrimental effects of salinity on turfgrass growth include osmotic stress, ion toxicity, and nutritional disturbances (Greenway and Munns, 1980, Lauchli, 1986, Cheeseman, 1988). Salt tolerant plants have the ability to minimize these detrimental effects by producing a series of anatomical, morphological, and physiological adaptations (Poljakoff-Mayber, 1975, Poljakoff-Mayber, 1988), such as an extensive root system and salt secreting glands on the leaf surface (Liphschitz and Waisel, 1974, Oross and Thomson, 1982, Gould and Shaw, 1983, Oross et al., 1985, Gorham et al., 1985, Sinha et al., 1986, Marcum and Murdoch, 1990a, Marcum et al., 1998).
Variations in salt tolerance among turfgrasses have been demonstrated in many studies using hydroponic culture systems (Dudeck et al., 1983, Horst and Taylor, 1983, Horst and Beadle, 1984, Torello and Symington, 1984, Marcum and Kopec, 1997, Marcum et al., 1998, Qian et al., 2000, Qian et al., 2001). Limited information is available to compare salinity responses of shoot and root in solution culture versus sand culture systems.
Kentucky bluegrass (Poa pratensis L.), native to Europe, is the most widely used cool-season turfgrass in the temperate and subarctic regions of North America. Tall fescue (Festuca arundinacea, Schreb) is a cool-season turfgrass best adapted to the transition zone in the US. Alkaligrass (Puccinellia distans, Parl.) is typically found inhabiting saline and alkaline sites throughout cooler portions of North America. Kentucky bluegrass, tall fescue, and alkaligrass are members of Festucoideae subfamily. Saltgrass (D. spicata, Beetle), a member of Chlorideae subfamily, is a warm season grass showing great salt tolerance. A breeding project is in progress at Colorado State University to develop turf-type saltgrass, for which more information is needed concerning the growth responses to different salinity levels.
The major objective of this study was to determine the relative salt tolerance and growth response of four turfgrass species to salinity in sand culture and hydroponic systems.
Section snippets
Plant materials and growth conditions
The experiments were carried out from 27 April 1998 to 11 August 1998 and repeated from 15 May 1999 to 28 September 1999, using plastic pots (20 cm in diameter and 20 cm in depth) in a greenhouse at Colorado State University. The plastic pots were filled with 7 kg of a mix of 50 sand:50 Isolite (w/w). The bulk density of the potting mix was 1.06 g cm−3. Isolite is a soil amendment derived from diatomaceous earth that reportedly has a high water holding capacity, low cation exchange capacity, and
Plant materials and growth conditions
The experiment was conducted from 14 July 1999 to 13 November 1999, and repeated from 14 April 2000 to 13 August 2000, in a greenhouse at Colorado State University with a solution culture system. Four grasses as described previously were planted into plastic cups (9 cm in diameter and 4 cm deep). The cups were filled with 1 cm layer of coarse, sterilized silica sand. The cup bottom was removed and covered with nylon screen to hold sand and allow roots to grow through. Twelve cups were placed into
Study I (Kentucky bluegrass and tall fescue)
Relative shoot growth (as a percent of control) decreased with increasing salinity in both species (Fig. 1A). Likewise, root growth of KBG decreased as salinity levels increased (Fig. 1B). However, root growth of TF did not change significantly. Regression analysis indicated that KBG experienced a 50% shoot and root growth reduction at 4.9 and 5.8 dS m−1, respectively, whereas 50% growth reduction of TF was caused by 10.0 dS m−1 for shoots and 19.6 dS m−1 for roots.
Growth of TF roots was less
Discussion
Growth parameters, such as shoot growth (Francois, 1988, Marcum and Murdoch, 1990b), root mass, root length (Marcum and Kopec, 1997, Marcum, 1999), and turf quality (Dean et al., 1996, Marcum and Kopec, 1997, Marcum, 1999) have been reported to be excellent criteria to determine salinity tolerance among turfgrasses. Based on data on growth parameters (relative shoot growth, 50% shoot growth reduction, leaf firing, and turf quality) the salinity tolerance ranking of selected grasses was:
References (48)
- et al.
Irrigation with brackish water under desert conditions. IX. The salt tolerance of six forage crops
Agric. Water Manage.
(1993) Factors influencing vascular plant zonation in North Carolina salt marshes
Ecology
(1963)- Arizona Department of Water Resources, 1995. Modifications to the second management plan: 1990–2000. Phoenix,...
- et al.
Growth of Sudan and tall fescue grasses as influenced by irrigation water salinity and leaching fraction
Agron. J.
(1970) - California State Water Resources Control Board. 1993. Porter-Cologne Act Provisions of Reasonableness and Reclamation...
Mechanisms of salinity tolerance in plants
Plant Physiol.
(1988)- et al.
Turfgrass quality, growth, and water use influnced by salinity and water stress
Agron. J.
(1996) - Dudeck, A.E., Peacock, C.H., 1993. Salinity effects on growth and nutrient uptake of selected warm season turf. Int....
- et al.
Effect of sodium chloride on Cynodon Turfgrasses
Agron. J.
(1983) - et al.
Ion relations of plants under drought and salinity
Aust. J. Plant Physiol.
(1986)
Salinity effects on three turf bermudagrasses
HortScience
Some mechanisms of salt tolerance in crop plants
Plant Soil
Mechanisms of salt tolerance in non-halophyes
Annu. Rev. Plant Physiol.
Interactions between growth, uptake of Cl and Na, and water relations of plants in saline environments. II. Highly vacuolated cells
Plant Cell Environ.
Effects of deicing salts on water quality and biota-literature review and recommended research
Highway Res. Inform. Ser. Abstracts
Effects of sea water concentrations on germination and ion accumulation in alkaligrass
Commun. Soil Sci. Plant. Anal.
Germination and initial growth of Kentucky bluegrass in soluble salts
Agron. J.
Salinity affects germination and growth of Tall Fescue cultivars
J. Am. Soc. Hort. Sci.
Diurnal variations in root diameter
Plant Physiol.
Responses and adaptation of crops to salinity
Acta Hortic.
Existence of salt glands in various genera of the Gramineae
New Phytol.
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