Wheat genotypes differ in potassium accumulation and osmotic adjustment under drought stress
P. M. Damon A B , Q. F. Ma A and Z. Rengel A
+ Author Affiliations
- Author Affiliations
A School of Earth and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
B Corresponding author. Email: paul.damon@uwa.edu.au
Crop and Pasture Science 62(7) 550-555 https://doi.org/10.1071/CP11071
Submitted: 15 March 2011 Accepted: 8 June 2011 Published: 28 July 2011
Abstract
Potassium (K) is the principal mineral solute contributing to osmotic adjustment (OA) in many crop species, and the magnitude of OA under drought stress may be increased by application of K fertilisers. Genotypic differences in either the capacity for OA under drought stress or the efficiency of K uptake and utilisation by wheat have been separately documented. However, it is not known whether genotypic differences in K uptake and utilisation are linked to differences in OA under drought stress. In this study, we quantified changes in OA in response to variable K fertilisation among five wheat genotypes with contrasting efficiency of K uptake and utilisation.
Fertilisation with K increased OA for most genotypes by increasing K+ uptake and translocation into shoots and its subsequent accumulation in young leaves when drought stress was imposed. Accumulation of K+ in young leaves accounted for 36–51% of OA among the genotypes. The magnitude of OA achieved by genotypes under K fertilisation was highly correlated with the net content of K accumulated in shoots. With K fertilisation, differences in shoot K+ content accounted for 84% of the difference in OA among wheat genotypes. By comparison, for plants without K fertilisation, K+ accumulation in young leaves contributed only 17–28% of OA. At low K supply, the magnitude of OA achieved by genotypes was independent of the content or concentration of K+ in shoots.
Under K-fertilised conditions, genotype Nyabing achieved the highest OA under drought stress, accumulated the highest concentration of K+ in young leaves (–0.87 MPa, accounting for 51% of OA), and had the greatest net K+ content in shoots. Genotype Wyalkatchem accumulated the smallest content of K+ in shoots and the lowest K+ concentration in young leaves (–0.40 MPa, accounting for 38% of OA), and achieved the lowest OA under drought stress. The greatest OA was achieved where high genotypic capacity to take up K was paired with conditions of high soil K availability.
Additional keywords: Triticum aestivum, potassium efficiency, water, abiotic stress.
References
Ashraf M, Ahmad A, McNeilly T (2001) Growth and photosynthetic characteristics in pearl millet under water stress and different potassium supply. Photosynthetica 39, 389–394.| Growth and photosynthetic characteristics in pearl millet under water stress and different potassium supply.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD38XhsVemurg%3D&md5=9da48aea62779c701465c22f571ea0dfCAS |
Blum A (1996) Crop responses to drought and the interpretation of adaptation. Plant Growth Regulation 20, 135–148.
| Crop responses to drought and the interpretation of adaptation.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2sXlsVGruw%3D%3D&md5=3ee2e8bccffeda236234e2c06625222eCAS |
Blum A, Zhang J, Nguyen HT (1999) Consistent differences among wheat cultivars in osmotic adjustment and their relationship to plant production. Field Crops Research 64, 287–291.
| Consistent differences among wheat cultivars in osmotic adjustment and their relationship to plant production.Crossref | GoogleScholarGoogle Scholar |
Chang R (1981) ‘Physical chemistry with applications to biological systems.’ 2nd edn (Macmillan Publishing: New York)
Chimenti CA, Pearson J, Hall AJ (2002) Osmotic adjustment and yield maintenance under drought in sunflower. Field Crops Research 75, 235–246.
| Osmotic adjustment and yield maintenance under drought in sunflower.Crossref | GoogleScholarGoogle Scholar |
Colwell JD, Esdaile RJ (1968) The calibration, interpretation, and evaluation of tests for the phosphorus fertilizer requirements of wheat in northern New South Wales. Australian Journal of Soil Research 6, 105–120.
| The calibration, interpretation, and evaluation of tests for the phosphorus fertilizer requirements of wheat in northern New South Wales.Crossref | GoogleScholarGoogle Scholar |
Damon PM, Rengel Z (2007) Wheat genotypes differ in potassium efficiency under glasshouse and field conditions. Australian Journal of Agricultural Research 58, 816–825.
| Wheat genotypes differ in potassium efficiency under glasshouse and field conditions.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXhtVSgt7rK&md5=4749fd3e88042ce45bf2f6484ab5e6d2CAS |
Genstat (2008) ‘Genstat statistical package for Windows. Release 12.1.’ (VSN International: Hemel Hempstead, UK) Available at: www.genstat.com
González A, Martın I, Ayerbe L (2008) Yield and osmotic adjustment capacity of barley under terminal water-stress conditions. Journal of Agronomy & Crop Science 194, 81–91.
| Yield and osmotic adjustment capacity of barley under terminal water-stress conditions.Crossref | GoogleScholarGoogle Scholar |
Hosking WJ (1986) Potassium for Victorian pastures—a review. Department of Agriculture and Rural Affairs, Victoria.
Jones MM, Osmond CB, Turner NC (1980) Accumulation of solutes in leaves of sorghum and sunflower in response to water deficits. Australian Journal of Plant Physiology 7, 193–205.
| Accumulation of solutes in leaves of sorghum and sunflower in response to water deficits.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL3cXktVCisLs%3D&md5=6bc586edb15821804498fd25d8cc46ffCAS |
Kuchenbuch R, Claassen N, Jungk A (1986) Potassium availability in relation to soil moisture. Plant and Soil 95, 221–231.
| Potassium availability in relation to soil moisture.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL28XmtVyjtr8%3D&md5=0ba9f252fbb03f773d5af9cfdcce3591CAS |
Lilley JM, Ludlow MM, McCouch SR, O’Toole JC (1996) Locating QTL for osmotic adjustment and dehydration tolerance in rice. Journal of Experimental Botany 47, 1427–1436.
| Locating QTL for osmotic adjustment and dehydration tolerance in rice.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK28XmslWlsrc%3D&md5=8e7fa7ee91df97b8285d3bb8d79f7130CAS |
Ma QF, Turner DW (2006) Osmotic adjustment segregates with and is positively related to seed yield in F3 lines of crosses between Brassica napus and B. juncea subjected to water deficit. Australian Journal of Experimental Agriculture 46, 1621–1627.
| Osmotic adjustment segregates with and is positively related to seed yield in F3 lines of crosses between Brassica napus and B. juncea subjected to water deficit.Crossref | GoogleScholarGoogle Scholar |
Ma QF, Turner DW, Levy D, Cowling WA (2004) Solute accumulation and osmotic adjustment in leaves of Brassica oilseeds in response to soil water deficit. Australian Journal of Agricultural Research 55, 939–945.
| Solute accumulation and osmotic adjustment in leaves of Brassica oilseeds in response to soil water deficit.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2cXnvVKiu7w%3D&md5=d0edbfa8cb7d3730309f7b6de35bf4d2CAS |
Ma QF, Niknam SR, Turner DW (2006) Responses of osmotic adjustment and seed yield of Brassica napus and B. juncea to soil water deficit at different growth stages. Australian Journal of Agricultural Research 57, 221–226.
| Responses of osmotic adjustment and seed yield of Brassica napus and B. juncea to soil water deficit at different growth stages.Crossref | GoogleScholarGoogle Scholar |
Marschner H (1995) ‘Mineral nutrition of higher plants.’ 2nd edn (Academic Press: London)
Moinuddin , Fischer RA, Sayre KD, Reynolds MP (2005) Osmotic adjustment in wheat in relation to grain yield under water deficit environments. Agronomy Journal 97, 1062–1071.
| Osmotic adjustment in wheat in relation to grain yield under water deficit environments.Crossref | GoogleScholarGoogle Scholar |
Morgan JM (1977) Differences in osmoregulation between wheat genotypes. Nature 270, 234–235.
| Differences in osmoregulation between wheat genotypes.Crossref | GoogleScholarGoogle Scholar |
Morgan JM (1992) Osmotic components and properties associated with genotypic differences in osmoregulation in wheat. Australian Journal of Plant Physiology 19, 67–76.
| Osmotic components and properties associated with genotypic differences in osmoregulation in wheat.Crossref | GoogleScholarGoogle Scholar |
Morgan JM (1995) Growth and yield of wheat lines with differing osmoregulative capacity at high soil water deficit in seasons of varying evaporative demand. Field Crops Research 40, 143–152.
| Growth and yield of wheat lines with differing osmoregulative capacity at high soil water deficit in seasons of varying evaporative demand.Crossref | GoogleScholarGoogle Scholar |
Morgan JM, Tan MK (1996) Chromosomal location of a wheat osmoregulation gene using RFLP analysis. Australian Journal of Plant Physiology 23, 803–806.
| Chromosomal location of a wheat osmoregulation gene using RFLP analysis.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2sXms1Ggtg%3D%3D&md5=55456843267648c46ab977373278f73aCAS |
Munns R, Weir R (1981) Contribution of sugars to osmotic adjustment in elongating and expanded zones of wheat leaves during moderate water deficits at two light levels. Australian Journal of Plant Physiology 8, 93–105.
| Contribution of sugars to osmotic adjustment in elongating and expanded zones of wheat leaves during moderate water deficits at two light levels.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL3MXhvVyktr4%3D&md5=b937ec20b1474d2fecd04646cab2a525CAS |
Northcote KH (1971) ‘A factual key for the recognition of Australian soils.’ (Rellim Technical Publications: Glenside, S. Aust.)
Pier PA, Berkowitz GA (1987) Modulation of water stress effects on photosynthesis by altered leaf K+. Plant Physiology 85, 655–661.
| Modulation of water stress effects on photosynthesis by altered leaf K+.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL1cXnt1entg%3D%3D&md5=a1bf360531f64c783ebbfa55ccb3d51bCAS |
Premachandra GS, Saneoka H, Fujita K, Ogata S (1993) Water stress and potassium fertilization in field grown maize (Zea mays L.): effects on leaf water relations and leaf rolling. Journal of Agronomy & Crop Science 170, 195–201.
| Water stress and potassium fertilization in field grown maize (Zea mays L.): effects on leaf water relations and leaf rolling.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3sXltFKgtLo%3D&md5=ae8e4e7855156248c4c0ad3048b22039CAS |
Rayment GE, Higginson FR (1992) ‘Australian laboratory handbook of soil and water chemical methods.’ (Inkata Press: Melbourne)
Rengel Z, Damon PM (2008) Crops and genotypes differ in efficiency of potassium uptake and use. Physiologia Plantarum 133, 624–636.
| Crops and genotypes differ in efficiency of potassium uptake and use.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXps1Oit78%3D&md5=39b0d94d599d76abd70480a430c4b3daCAS |
Sangakkara UR, Frehner M, Nosberger J (2000) Effect of soil moisture and potassium fertilizer on shoot water potential, photosynthesis and partitioning of carbon in mungbean and cowpea. Journal of Agronomy & Crop Science 185, 201–207.
| Effect of soil moisture and potassium fertilizer on shoot water potential, photosynthesis and partitioning of carbon in mungbean and cowpea.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXns1Gku7w%3D&md5=8743e98f8a08c5df7373132294a6724aCAS |
Shabala S, Cuin TA (2007) Potassium transport and plant salt tolerance. Physiologia Plantarum 133, 651–669.
| Potassium transport and plant salt tolerance.Crossref | GoogleScholarGoogle Scholar |
Simmons WJ (1975) Determination of low concentrations of cobalt in small samples of plant material by flameless atomic absorption spectrophotometry. Analytical Chemistry 47, 2015–2018.
| Determination of low concentrations of cobalt in small samples of plant material by flameless atomic absorption spectrophotometry.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE2MXlslGjsr0%3D&md5=87ce98827aa106ae9f4dc42e550aa2e7CAS |
Thomas H (1991) Accumulation and consumption of solutes in swards of Lolium perenne during drought and after rewatering. New Phytologist 118, 35–48.
| Accumulation and consumption of solutes in swards of Lolium perenne during drought and after rewatering.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK3MXlsFGhtLc%3D&md5=0cee2fe6628beefae169711aae69098eCAS |
Walkley A, Black IA (1934) An examination of the Degtjareffe method for determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Science 37, 29–38.
| An examination of the Degtjareffe method for determining soil organic matter and a proposed modification of the chromic acid titration method.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaA2cXitlGmug%3D%3D&md5=6ad5da49668edf8c6aa023d416d2a716CAS |
Zhu X, Gong H, Chen G, Wang S, Zhang C (2005) Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages. Journal of Arid Environments 62, 1–14.
| Different solute levels in two spring wheat cultivars induced by progressive field water stress at different developmental stages.Crossref | GoogleScholarGoogle Scholar |
