The interaction between waterlogging and salinity in higher plants: causes, consequences and implications

Barrett-Lennard, E.G.

doi:10.1023/a:1024574622669

Cited by 375 publications

(324 citation statements)

References 78 publications

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“…Both are indigenous to the arid interior of Australia; therefore, it is relatively easy to achieve drought tolerance in higher rainfall agricultural zones. The drought-tolerance mechanisms of old man saltbush include deep roots (>4 m), osmotic control and slow growth when water is scarce (Barrett-Lennard 2003;Norman et al 2010b).…”

Section: Mediterranean or Low-rainfall Semi-arid Shrublandsmentioning

confidence: 99%

Use of functional traits to identify Australian forage grasses, legumes and shrubs for domestication and use in pastoral areas under a changing climate

Mitchell¹,

Norman

Whalley

2015

Crop Pasture Sci.

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Abstract. Considerable uncertainty exists about future climatic predictions but there is little doubt among experts that the future will be warmer. Climate change and the associated elevation in atmospheric CO 2 level and temperatures will provide novel challenges and potential opportunities for cultivated plant species. Plant breeding and domestication can contribute to improvements in both yield and quality of native grasses, legumes and forage shrubs. This review explores the use of functional traits to identify native Australian grasses, legumes and forage shrubs suitable for domestication, to meet the challenges and opportunities under a changing climate in pastoral areas in Australia. The potential of these species in terms of life history, regenerative traits, forage quality and quantity, drought tolerance and invasiveness is examined. The paper focuses on three Australian pastoral regions (high-rainfall temperate south, tropical and subtropical grasslands, low-rainfall semi-arid shrublands), in terms of future climate predictions and potential of selected native species to meet these requirements. Selection for adaptation to new climatic environments is challenging but many native species already possess the traits required to cope with the environment under future climate scenarios.

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Section: Mediterranean or Low-rainfall Semi-arid Shrublandsmentioning

confidence: 99%

Use of functional traits to identify Australian forage grasses, legumes and shrubs for domestication and use in pastoral areas under a changing climate

Mitchell¹,

Norman

Whalley

2015

Crop Pasture Sci.

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“…Helyar 1991;Scott et al 2000) and waterlogging (e.g. Belford et al 1990;McFarlane 1990, 1995;MacEwan et al 1992;Sarlistyaningsih et al 1995;Christy 1996;Malik et al 2002;Barrett-Lennard 2003;Peries et al 2004) on soil processes and plant growth responses.…”

Section: Chemical Subsoil Constraints In the South-east Australian Hrzmentioning

confidence: 99%

High clay contents, dense soils, and spatial variability are the principal subsoil constraints to cropping the higher rainfall land in south-eastern Australia

MacEwan¹,

Crawford²,

Newton

et al. 2010

Soil Res.

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Abstract. Available soil information and unpublished data from soil survey indicate that high clay contents and high bulk density are the major subsoil constraints to crop growth in the high rainfall zone (HRZ) of south-eastern Australia. Seven high rainfall agroecological zones are proposed as sub-divisions of the region to focus future research and development. The HRZ is dominated by texture-contrast soils (69.9%) and soils with clay subsoil (89.4%) and high bulk density (mean 1.6 t/m 3 ). Sodicity and acidity are also significant constraints to crop production in the HRZ. The physical limitations to root growth in the HRZ subsoils are best appreciated through the least-limiting water range concept and growth-limiting bulk densities. Management options and results of past research and intervention in soil loosening, drainage, raised beds, liming, and gypsum are reviewed. Climatic uncertainty raises questions about the future relevance of waterlogging as a constraint in the HRZ and confounds the development of reliable recommendations for engineering intervention.

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“…Low O 2 concentrations limit root respiration and drastically reduce the energy available from the oxidation of glucose, with up to 95% reductions in ATP production (Barrett-Lennard 2003). Accumulations of ethylene and CO 2 further suppress or alter root growth and development.…”

Section: Effects On Plant Growthmentioning

confidence: 99%

“…Excess water conditions may also impact the ability of a plant to take up inorganic nutrients due to the effects on processes associated with solute movement across membranes (Barrett-Lennard 2003). Uptake of essential nutrients such as N, P, and K takes place against gradients of chemical and electrical potential, which requires energy inputs from aerobic respiration; respiration is inhibited under anaerobic conditions making nutrient uptake energetically unfavorable .…”

Section: Effects On Plant Growthmentioning

confidence: 99%

“…Setter and Waters (2003) identify five categories of adaptive traits that improve plant physiology and watertolerance: (1) phenology (i.e., timing of plant life cycle), (2) morphology and anatomy (such as the ability to develop aerenchyma or adventitious roots), (3) nutrition, (4) metabolism (including anaerobic energy production and anoxia tolerance), and (5) post-anoxic damage and recovery. Where land has been affected by secondary salinity and excess water, it would be worthwhile to explore incorporating genes for both water-tolerance and salt tolerance into existing crops (Barrett-Lennard 2003), such as the recent work on wheat (Hordeum marinumÁ Triticum aestivum) by Islam et al (2007). However, it is important to bear in mind the particular conditions under which a given cultivar is best suited.…”

Section: Breeding and Cultivar Selectionmentioning

confidence: 99%

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Managing excess water in Canadian prairie soils: A review

Bedard‐Haughn¹

2009

Can. J. Soil. Sci.

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Bedard-Haughn, A. 2009. Managing excess water in Canadian prairie soils: A review. Can. J. Soil Sci. 89: 157Á168. ''Excess water'' conditions develop when a soil is unable to transmit water, leading to the onset of saturated conditions harmful to soils and crops. Negative agricultural impacts include reduced trafficability, physical damage to crops under hypoxic or anoxic conditions, increased salinity or sodicity, reduced nutrient availability and uptake, and increased incidence of weeds and pests. There are two main objectives in managing landscapes prone to excess water, both of which must consider soil and landform characteristics. The first is to maximize infiltration and conductivity through tillage and residue management. The second is to remove water from the soil profile as quickly as possible through drainage or the adoption of high water use plants such as alfalfa (Medicago sativa), which increase water losses through transpiration. Changes to the overall cropping system can also be made, including selecting crops and forages that have shown reduced sensitivity to excess water, applying seed treatments that encourage the development of water-tolerant traits, timing fertilizer application to correspond with maximum plant uptake, and incorporating high water use crops into the rotation. Recent work from Australia suggests that management of excess water requires a multi-disciplinary approach; however, little research has been done on this problem in the semiarid to sub-humid Canadian Prairies. e´duite des sols, les de´gaˆts aux cultures re´sultant de conditions hypoxiques ou anoxiques, une plus grande salinite´ou sodicite´, une re´duction de la disponibilite´ou de l'absorption des e´le´ments nutritifs et la prolife´ration des mauvaises herbes et des ravageurs. L'ame´nagement des paysages qui peuvent connaıˆtre des e´pisodes de saturation poursuit deux grands objectifs, chacun devant prendre en compte les proprie´te´s du sol et du relief. Le premier consiste a`maximiser l'infiltration et la conductivite´en travaillant le sol et en ge´rant les re´sidus; le second consiste a`retirer l'eau du profil du sol aussi vite que possible par le drainage ou la culture de plantes ne´cessitant beaucoup d'eau, telle la luzerne (Medicago sativa), en vue d'accroıˆtre les pertes par transpiration. On peut aussi apporter des changements aux syste`mes agricoles, notamment choisir des cultures vivrie`res et fourrage`res moins sensibles a`un sol gorge´d'eau, traiter les semences pour favoriser le de´veloppement d'une tole´rance aux sols humides, fertiliser au moment ou`la capacite´d'absorption des plantes atteint son maximum et inte´grer des cultures utilisant beaucoup d'eau aux assolements. Des travaux re´cemment effectue´s en Australie laissent croire que la gestion des exce´dents d'eau exige une approche multidisciplinaire, ne´anmoins, on a effectueṕ eu de recherches sur le sujet dans la zone semi-aride a`subhumide des Prairies canadiennes.

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The interaction between waterlogging and salinity in higher plants: causes, consequences and implications

Cited by 375 publications

References 78 publications

Use of functional traits to identify Australian forage grasses, legumes and shrubs for domestication and use in pastoral areas under a changing climate

Use of functional traits to identify Australian forage grasses, legumes and shrubs for domestication and use in pastoral areas under a changing climate

High clay contents, dense soils, and spatial variability are the principal subsoil constraints to cropping the higher rainfall land in south-eastern Australia

Managing excess water in Canadian prairie soils: A review

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