Crop Response in Salt-Affected Soils

Eynard, Anna; Lal, Rattan; Wiebe, Keith

doi:10.1300/j064v27n01_03

Cited by 107 publications

(58 citation statements)

References 53 publications

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“…The loss of rice yield in saline lands is estimated to be 30-50% per annum [14]. During evolution plants have developed mechanisms to sense changes in the environment and adapt to them [15].…”

Section: Introductionmentioning

confidence: 99%

Whole Genome Sequencing and Analysis of Godawee, a Salt Tolerant Indica Rice Variety

Singhabahu¹,

Wijesinghe²,

Gunawardana³

et al. 2017

J Rice Res

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Godawee is a cultivated salt tolerant Oryza sativa rice variety indigenous to Sri Lanka, but its genetic basis is unknown. The whole genome of Godawee was sequenced using Illumina paired-end technology. The reads were mapped to Oryza sativa Nipponbare reference genome. Investigation of genome wide variation patterns resulted in the identification of 2,231,717 SNPs and 480,460 InDels. In silico analysis identified 192,249 non-synonymous SNPs in 31,287 genes. Variants in 28 Salt Tolerance Related Genes (STRGs) were examined. The OsHKT 2;1 gene had the largest number of SNPs in comparison to the reference genome. 16 non-synonymous SNPs that were predicted to have functional effects either by SIFT, Provean or SNAP algorithms were detected in the STRGs. The upstream regions of the STRGs were examined for cis-regulatory elements found in STIFDB, Plant CARE and PLACE databases. The most striking of this was the WRKY cis-acting family of elements which were found in abundance in the upstream regions of OsAPx8, OsMSR2, OsTIR1, OsHKT2;3, OsHKT14 and OsSOS1 genes. Sequencing and whole genome analysis of Godawee helped to understand the genetic basis of its salinity tolerance which is a complex trait involving multiple factors.

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Section: Introductionmentioning

confidence: 99%

Whole Genome Sequencing and Analysis of Godawee, a Salt Tolerant Indica Rice Variety

Singhabahu¹,

Wijesinghe²,

Gunawardana³

et al. 2017

J Rice Res

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“…This can dramatically affect our natural environment and reduce the viability of our agricultural sector. It has been estimated that more than 800 million ha of land is affected by natural salinity and a further 77 million ha of land has been salinised as a consequence of human activities (Metternicht and Zinck 2003;Eynard et al 2005;Munns and Tester 2008;Shabala and Cuin 2008). Plant production was significantly reduced in salt-affected land, with an estimated 30-50% yield loss for rice (Oryza sativa L.), 10-90% for wheat (Triticum aestivum L.), 50-70% for cotton (Gossypium hirsutum L.) and 30-90% for sugarcane (Saccharum officinarum L.).…”

Section: Introductionmentioning

confidence: 99%

“…Plant production was significantly reduced in salt-affected land, with an estimated 30-50% yield loss for rice (Oryza sativa L.), 10-90% for wheat (Triticum aestivum L.), 50-70% for cotton (Gossypium hirsutum L.) and 30-90% for sugarcane (Saccharum officinarum L.). Changes in the global environment due to climate change are predicted to cause further yield losses as a result of soil salinity (Eynard et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Physiological basis of salt stress tolerance in rice expressing the antiapoptotic gene SfIAP

Hoang

Williams

Khanna

et al. 2014

Functional Plant Biol.

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Abstract. Programmed cell death-associated genes, especially antiapoptosis-related genes have been reported to confer tolerance to a wide range of biotic and abiotic stresses in dicotyledonous plants such as tobacco (Nicotiana tabacum L.) and tomato (Solanum lycopersicum L.). This is the first time the antiapoptotic gene SfIAP was transformed into a monocotyledonous representative: rice (Oryza sativa L.). Transgenic rice strains expressing SfIAP were generated by the Agrobacterium-mediated transformation method and rice embryogenic calli, and assessed for their ability to confer tolerance to salt stress at both the seedling and reproductive stages using a combination of molecular, agronomical, physiological and biochemical techniques. The results show that plants expressing SfIAP have higher salt tolerance levels in comparison to the wild-type and vector controls. By preventing cell death at the onset of salt stress and maintaining the cell membrane's integrity, SfIAP transgenic rice plants can retain plant water status, ion homeostasis, photosynthetic efficiency and growth to combat salinity successfully.

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“…Data on the cause-effect relationship between specific degradation processes and agronomic yield are few. Some examples of empirical relationships include the following: (i) Soil organic C concentration vs. crop yield [47,48]; (ii) Soil erosion vs. crop yield [49][50][51]; (iii) Soil salinity vs. crop yield [52]; (iv) Nutrient depletion [53]; (v) Soil compaction vs. crop yield [54]. Nkonya et al [55] documented that cost of no-action to alleviate the problem of soil degradation exceeds that of a judicious action to prevent it or manage it.…”

Section: Stabilization Of Atmospheric Co 2 No Climate Changementioning

confidence: 99%

Climate Strategic Soil Management

Lal

2014

Challenges

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Abstract:The complex and strong link between soil degradation, climate change and food insecurity is a global challenge. Sustainable agricultural systems must be integral to any agenda to address climate change and variability, improve renewable fresh water supply and quality, restore degraded soils and ecosystems and advance food security. These challenges are being exacerbated by increasing population and decreasing per capita arable land area and renewable fresh water supply, the increasing frequency of extreme events, the decreasing resilience of agroecosystems, an increasing income and affluent lifestyle with growing preference towards meat-based diet and a decreasing soil quality and use efficiency of inputs. Reversing these downward spirals implies the implementation of proven technologies, such as conservation agriculture, integrated nutrient management, precision agriculture, agroforestry systems, etc. Restoration of degraded soil and desertified ecosystems and the creation of positive soil and ecosystem C budgets are important. Urban agriculture and green roofs can reduce the energy footprint of production chains for urban and non-urban areas and enhance the recycling of by-products. Researchable priorities include sustainable land use and soil/water management options, judicious soil governance and modus operandi towards payments to land managers for the provisioning of ecosystem services.

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Crop Response in Salt-Affected Soils

Cited by 107 publications

References 53 publications

Whole Genome Sequencing and Analysis of Godawee, a Salt Tolerant Indica Rice Variety

Whole Genome Sequencing and Analysis of Godawee, a Salt Tolerant Indica Rice Variety

Physiological basis of salt stress tolerance in rice expressing the antiapoptotic gene SfIAP

Climate Strategic Soil Management

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