Root-zone constraints and plant-based solutions for dryland salinity

Rengasamy, Pichu; Chittleborough, David J.; Helyar, K. R.

doi:10.1023/a:1027326424022

Cited by 116 publications

(62 citation statements)

References 28 publications

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“…The particular processes contributing salt, combined with the influence of other climatic and landscape features and the effects of human activities, determine where salt is likely to accumulate in the landscape (Rengasamy, 2006). Naturally salt-affected areas occur widely in arid and semi-arid areas (Rengasamy et al, 2003). The most common causes are (1) land clearing and the replacement of perennial vegetation with annual crops, and (2) irrigation schemes using salt-rich irrigation water or having insufficient drainage.…”

Section: Types and Causes Of Salinitymentioning

confidence: 99%

Arbuscular mycorrhizal symbiosis and alleviation of salinity stress

Aggarwal

Kadian

Karishma

et al. 2012

JANS

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Several environmental factors adversely affect plant growth and development and final yield performance of a crop. Drought, salinity, nutrient imbalances (including mineral toxicities and deficiencies) and extremes of temperature are among the major environmental constraints to crop productivity worldwide. Development of crop plants with stress tolerance, however, requires, among others, knowledge of the physiological mechanisms and genetic controls of the contributing traits at different plant developmental stages. In the past two decades, biotechnology research has provided considerable insights into the mechanism of biotic stress tolerance in plants at the molecular level. Furthermore, different abiotic stress factors may provoke osmotic stress, oxidative stress and protein denaturation in plants, which lead to similar cellular adaptive responses such as accumulation of compatible solutes, induction of stress proteins, and acceleration of reactive oxygen species scavenging systems. Recently, various methods are adapted to improve plant tolerance to salinity injury through either chemical treatments (plant hormones, minerals, amino acids, quaternary ammonium compounds, polyamines and vitamins) or biofertilizers treatments (Asymbiotic nitrogen-fixing bacteria, symbiotic nitrogen-fixing bacteria) or enhanced a process used naturally by plants (mycorrhiza) to minimise the movement of Na+ to the shoot. Proper management of Arbuscular Mycorrhizal Fungi (AMF) has the potential to improve the profitability and sustainability of salt tolerance. In this review article, the discussion is restricted to the mycorrhizal symbiosis and alleviation of salinity stress.

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Section: Types and Causes Of Salinitymentioning

confidence: 99%

Arbuscular mycorrhizal symbiosis and alleviation of salinity stress

Aggarwal

Kadian

Karishma

et al. 2012

JANS

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“…A high proportion of Na + ions on the clay cation exchange complex (sodicity) in comparison with Ca 2+ , magnesium (Mg 2+ ) and potassium (K + ) ions results in poor soil-water relations in many soils (So and Aylmore 1993), or induces Ca 2+ deficiency (Dang et al 1999;Rengasamy et al 2003). The presence of high salt concentrations in the soil solution (salinity) reduces plant growth, directly affecting physiological functions through increased osmotic potential and specific ion toxicity (Shaw 1997).…”

Section: Subsoil Compaction and Inherently Dense Subsoil Matrixmentioning

confidence: 99%

“…Farming practices including tillage and periods of fallow have severely depleted earthworms (Robertson 1990), and with extended fallows, VAM also declines (Thompson 1987). Farming practices, including stubble retention, that result in increased organic matter inputs (Dalal and Bridge 1996) favour balanced microbial activities (Gupta 2004;Rengasamy et al 2003).…”

Section: Biological Constraintsmentioning

confidence: 99%

Subsoil constraints to grain production in the cropping soils of the north-eastern region of Australia: an overview

Dang¹,

Dalal²,

Routley³

et al. 2006

Aust. J. Exp. Agric.

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“…They are characterized by high EC e (electrical conductivity of saturated paste extracts), SAR (sodium adsorption rate of saturated paste extracts) and chloride (Cl − ) content, often related to their heavy texture. Plant growth is significantly affected via several mechanisms including sodium (Na + ) or chloride toxicity, competition for uptake of other cations and osmotic effects on water uptake or interference with uptake of nutrients (Grewal, 2010;Naidu and Rengasamy, 1993;Rengasamy et al, 2003). Especially in fine-textured soils (silt), high SAR and the salinity problem have a marked detrimental effect on soil structure; and saline-sodic soils can slake, disperse and swell and further result in a decrease in water and air movement, plant-available water, root penetration, seedling growth and plant establishment (Akhter et al, 2004;Oster et al, 1999;Sumner, 1993).…”

Section: Introductionmentioning

confidence: 99%

Response of a salt-sensitive plant to processes of soil reclamation in two saline–sodic, coastal soils using drip irrigation with saline water

Kang

Wan

et al. 2016

Agricultural Water Management

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a b s t r a c tThe aim of this study was to evaluate the impact of soil types and properties on coastal saline soil reclamation and the response of plant growth to the reclamation processes in two soils. Two very heavy coastal saline soils were reclaimed in a three-year trial using drip irrigation with saline water. Chinese roses (Rosa chinensis) were planted, and soil indexes, growth characters, ion absorption and dry matter production were determined. Our results showed that significant salt leaching occurred in both soils, and the effect during the early period of reclamation was better in sandy loam than silt soil. There were higher emergence and survival rates of plants in sandy loam soil due to the rapid reclamation process, while plant growth and dry mass were greater in silt soil due to good fertilizer and water conservation. Most roots were present in the 0-20-cm profile in both soils, but the fine root length value in silt soil was relatively high. These results indicate that water and nutrient management differed in the two soils. During soil reclamation, more attention should be paid to nutrient supply and maintaining soil moisture in sandy loam and to rapidly establishing suitable soil root-zone environments for plant emergence in silt soil.

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Root-zone constraints and plant-based solutions for dryland salinity

Cited by 116 publications

References 28 publications

Arbuscular mycorrhizal symbiosis and alleviation of salinity stress

Arbuscular mycorrhizal symbiosis and alleviation of salinity stress

Subsoil constraints to grain production in the cropping soils of the north-eastern region of Australia: an overview

Response of a salt-sensitive plant to processes of soil reclamation in two saline–sodic, coastal soils using drip irrigation with saline water

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