Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality

Summer dormancy in Dactylis glomerata L.: the influence of season of sowing and a simulated mid-summer storm on two contrasting cultivars

M. R. Norton A B , F. Lelièvre A and F. Volaire A

A Institut National de Recherche Agronomique (INRA), UMR System, 2 place Viala, 34060 Montpellier, France.

B Corresponding author; NSW Department of Primary Industries, GPO Box 1600, Canberra, ACT 2601, Australia, and School of Land and Food Sciences, University of Queensland, St Lucia, Qld 4072, Australia. Email:

Australian Journal of Agricultural Research 57(5) 565-575
Submitted: 29 June 2005  Accepted: 3 January 2006   Published: 17 May 2006


A series of trials to increase understanding of the summer dormancy trait in Dactylis glomerata was conducted. Autumn-sown reproductive and younger, spring-sown plants of 2 drought-resistant cultivars, contrasting for summer dormancy, were established and then tested in summer 2002 under long drought, drought + mid-summer storm, or full irrigation. The autumn-sown reproductive plants of cv. Kasbah were summer dormant under all moisture regimes and exhibited the characteristic traits including growth cessation, rapid herbage senescence, and dehydration of surviving organs (–6.7 MPa). Cultivar Kasbah used 8% less soil water over the summer and also began to rehydrate its leaf bases from conserved soil water before the drought broke. The non-dormant cv. Medly grew for 10 days longer under drought and whenever moisture was applied; Medly also responded to the storm with a decline in dehydrin expression in leaf bases, whereas no decline occurred in Kasbah, presumably because it remained dormant and therefore much drier. The irrigated, younger, spring-sown swards of cv. Kasbah had restrained growth and produced only about 25% of the herbage of cv. Medly. Drought reduced activity and growth of young plants of both cultivars, but whereas Medly regrew in response to the storm, cv. Kasbah did not, indicating that dormancy, although only partially expressed after spring sowing, was reinforced by summer drought. A longer drought in 2003 caused a 22% loss of the basal cover in cv. Medly, whereas Kasbah fully maintained its sward and therefore produced a higher post-drought autumn yield. This work confirms summer dormancy as a powerful trait for improving persistence over long, dry summers.

Additional keywords: cocksfoot, orchardgrass, drought, dehydrin, persistence, pasture.


Biddiscombe EF Rogers AL Maller RA 1977 Summer dormancy, regeneration and persistence of perennial grasses in south-western Australia. Australian Journal of Experimental Agriculture and Animal Husbandry 17 795 801 doi:10.1071/EA9770795

Bradford M 1976 A rapid and sensitive method for the quantification of microgram quantities of protein using the principle of protein-dye binding. Annals of Biochemistry 72 248 254 doi:10.1016/0003-2697(76)90527-3

Calder DM 1964 Stage development and flowering in Dactylis glomerata L. Annals of Botany 28 187 206

Carpenter JA (1968–1969) Drought tolerance in Dactylis. Waite Agricultural Research Institute Biennial Report.

Close TJ 1996 Dehydrins: emergence of a biochemical role of a family of plant dehydration proteins. Physiologia Plantarum 97 795 803

Close TJ Fenton RD Moonan F 1993 A view of plant dehydrins using antibodies specific to the carboxy terminal peptide. Plant Molecular Biology 23 279 286 doi:10.1007/BF00029004

Duncan M (1986) Cocksfoot-its use in improved pastures. Dept. of Agriculture, Armidale, New South Wales.

Ewing MA (2004) New trees and pastures—when, where and likely role in farming systems. In ‘Salinity solutions: working with science and society’. (Eds A Ridley, P Feikema, S Bennet, MJ Rogers, R Wilkinson, J Hirth) (CD-ROM; CRC for Plant-Based Management of Dryland Salinity: Perth)

Hoen K 1968 a The effect of plant size and developmental stage on summer survival of some perennial grasses. Australian Journal of Experimental Agriculture and Animal Husbandry 8 190 196 doi:10.1071/EA9680190

Hoen K 1968 b Summer dormancy in Phalaris tuberosa L. Australian Journal of Agricultural Research 19 227 239 doi:10.1071/AR9680227

Ingram J Bartels D 1996 The molecular basis of dehydration tolerance in plants. Annual Review of Plant Physiology and Plant Molecular Biology 47 377 403 doi:10.1146/annurev.arplant.47.1.377

Knight R 1960 The growth of cocksfoot (Dactylis glomerata L.) under spaced plant and sward conditions. Australian Journal of Agricultural Research 11 457 472 doi:10.1071/AR9600457

Knight R 1965 The relation between yield and reproductive phase in cocksfoot (Dactylis glomerata L.) in a winter rainfall environment. Australian Journal of Agricultural Research 16 505 515 doi:10.1071/AR9650505

Knight R 1966 The performance of hybrids between Mediterranean and Northern European parents of cocksfoot (Dactylis glomerata L.) in a Mediterranean type environment. Australian Journal of Agricultural Research 17 105 117 doi:10.1071/AR9660105

Lang GA Early JD Martin GC Darnell RL 1987 Endo-, Para-, and Eco-dormancy: physiological terminology and classification for dormancy research. HortScience 22 371 377

Laude HM 1953 The nature of summer dormancy in perennial grasses. Botanical Gazette 114 282 292

Lazarides M (1992) Resurrection grasses (Poaceae) in Australia. In ‘Desertified grasslands. Their biology and management’. pp. 213–234. (Academic Press: London)

Lelievre F , Norton M , Volaire F (2003) Summer survival strategies and water use by perennial grasses in Mediterranean pastures. In ‘Optimisation of water use by plants in the Mediterranean, 2003’. (Available from the coauthors)

Lodge GM Garden DL 2000 Grazing management studies in the Temperate Pasture Sustainability Key Program: site descriptions, treatments and data collection. Australian Journal of Experimental Agriculture 40 133 142

Lolicato SJ 2000 Soil water dynamics and growth of perennial pasture species for dryland salinity control. Australian Journal of Experimental Agriculture 40 37 46 doi:10.1071/EA99051

Ludlow MM (1989) Strategies of response to water stress. In ‘Structural and functional responses to environmental stresses: water shortage’. (Eds KH Kreeb, H Richter, TM Hinckley) pp. 269–281. (SPB Academic Publishing BV: The Hague)

McWilliam JR 1968 The nature of the perennial response in Mediterranean grasses. 2. Senescence, summer dormancy, and survival in Phalaris. Australian Journal of Agricultural Research 19 397 409 doi:10.1071/AR9680397

Neal-Smith CA (1955) ‘Report on herbage plant exploration in the Mediterranean region.’ (FAO: Rome)

Ofir M Kerem D 1982 The effects of temperature and photoperiod on the onset of summer dormancy in Poa bulbosa L. Annals of Botany 50 259 264

Ofir M Kigel J 1998 Abscisic acid involvement in the induction of summer-dormancy in Poa bulbosa, a grass geophyte. Physiologia Plantarum 102 163 170

Ofir M Koller D 1974 Relationship between thermoinduction and photoinduction of flowering and dormancy in Hordeum bulbosum L., a perennial grass. Australian Journal of Plant Physiology 1 259 270

Ofir M Koller D Negbi M 1967 Studies on the physiology of regeneration buds of Hordeum bulbosum. Botanical Gazette 128 25 34

Oram RN (1990) ‘Register of Australian herbage plant cultivars.’ (CSIRO: East Melbourne)

Piano E Pecetti L Annicchiarico P Carroni AM Fornasier F Romani M 2004 Combining drought tolerance and responsiveness to summer moisture availability in cocksfoot (Dactylis glomerata L.) germplasm grown in Mediterranean environments. Australian Journal of Agricultural Research 55 1197 1204 doi:10.1071/AR04067

Ridley AM White RE Simpson RJ Callinan L 1997 Water use and drainage under phalaris, cocksfoot and annual ryegrass pastures. Australian Journal of Agricultural Research 48 1011 1023 doi:10.1071/A96157

Silsbury JH 1961 A study of dormancy, survival, and other characteristics in Lolium perenne L. at Adelaide, S.A. Australian Journal of Agricultural Research 12 1 9 doi:10.1071/AR9610001

Silsbury JH 1964 Tiller dynamics, growth and persistency of Lolium perenne L. and of Lolium rigidum Gaud. Australian Journal of Agricultural Research 15 9 20 doi:10.1071/AR9640009

Turner NC 1986 Adaptation to water deficits: a changing perspective. Australian Journal of Plant Physiology 13 175 190

Vegis A 1964 Dormancy in higher plants. Annual Review of Plant Physiology 15 185 224

Virgona JM Bowcher A 2000 Effects of grazing interval on basal cover of four perennial grasses in a summer-dry environment. Australian Journal of Experimental Agriculture 40 299 311 doi:10.1071/EA98015

Volaire F 2002 Drought survival, summer dormancy and dehydrin accumulation in contrasting cultivars of Dactylis glomerata. Physiologia Plantarum 116 42 51 doi:10.1034/j.1399-3054.2002.1160106.x

Volaire F Conejero G Lelievre F 2001 Drought survival and dehydration tolerance in Dactylis glomerata and Poa bulbosa. Australian Journal of Plant Physiology 28 743 754

Volaire F Lelievre F 2001 Drought survival in Dactylis glomerata and Festuca arundinacea under similar rooting conditions in tubes. Plant and Soil 229 225 234

Volaire F Norton MR Norton GM Lelievre F 2005 Seasonal patterns of growth, dehydrins and water-soluble carbohydrates in genotypes of Dactylis glomerata varying in summer dormancy. Annals of Botany 95 981 990 doi:10.1093/aob/mci102

Volaire F Thomas H Lelievre F 1998 a Survival and recovery of perennial forage grasses under prolonged Mediterranean drought: growth, death, water relations and solute content in herbage and stubble. New Phytologist 140 439 449 doi:10.1046/j.1469-8137.1998.00288.x

Volaire F Thomas H Bertagne N Bourgeois E Gautier MF Lelievre F 1998 b Survival and recovery of perennial forage grasses under prolonged Mediterranean drought: water status, solute accumulation, abscisic acid concentration and accumulation of dehydrin transcripts in bases of immature leaves. New Phytologist 140 451 460 doi:10.1046/j.1469-8137.1998.00287.x

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