Aluminium tolerance in wheat: correlating hydroponic evaluations with field and soil performances*

Baier, A. C.; Somers, Daryl J.; Gusiafson, J. P.

doi:10.1111/j.1439-0523.1995.tb01236.x

Cited by 68 publications

(36 citation statements)

References 18 publications

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“…An alternative method for evaluating Al resistance is based on the use of a nutrient solution containing a toxic level of Al. Therefore, it has been widely used in genetic studies (Baier et al, 1995;Polle et al, 1978;Samac and Tesfaye, 2003). With this method, root growth rate during Al stress was measured to determine Al resistance of ditelosomic lines of Chinese Spring and RILs from the cross of Chinese Spring-Sumai 3 chromosome 7A substitution line and Annong 8455 in this study.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Trait Loci for Aluminum Resistance in Wheat Cultivar Chinese Spring

Bai

2006

Plant Soil

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Aluminum (Al) toxicity is one of the major constrains for wheat production in many wheat growing areas worldwide. Further understanding of inheritance of Al resistance may facilitate improvement of Al resistance of wheat cultivars (Triticum aestivum L.). A set of ditelosomic lines derived from the moderately Alresistant wheat cultivar Chinese Spring was assessed for Al resistance. The root growth of ditelosomic lines DT5AL, DT7AL, DT2DS and DT4DS was significantly lower than that of euploid Chinese Spring under Al stress, suggesting that Al-resistance genes might exist on the missing chromosome arms of 5AS, 7AS, 2DL and 4DL of Chinese Spring. A population of recombinant inbred lines (RILs) from the cross Annong 8455 Â Chinese Spring-Sumai 3 7A substitution line was used to determine the effects of these chromosome arms on Al resistance. A genetic linkage map consisting of 381 amplified fragment length polymorphism (AFLP) markers and 168 simple sequence repeat (SSR) markers was constructed to determine the genetic effect of the quantitative trait loci (QTLs) for Al resistance in Chinese Spring. Three QTLs, Qalt.pser-4D, Qalt.pser-5A and Qalt.pser-2D, were identified that enhanced root growth under Al stress, suggesting that inheritance of Al resistance in Chinese Spring is polygenic. The QTL with the largest effect was flanked by the markers of Xcfd23 and Xwmc331 on chromosome 4DL and most probably is multi-allelic to the major QTL identified in Atlas 66. Two additional QTLs, Qalt.pser-5A and Qalt.pser-2D on chromosome 5AS and 2DL, respectively, were also detected with marginal significance in the population. Some SSR markers identified in this study would be useful for marker-assisted pyramiding of different QTLs for Al resistance in wheat cultivars.Abbreviations: AFLP -amplified fragment length polymorphism; Al -Aluminum; DT -ditelosomic line; QTL -quantitative trait locus; RILs -recombinant inbred lines; SSR -simple sequence repeat

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Section: Discussionmentioning

confidence: 99%

Quantitative Trait Loci for Aluminum Resistance in Wheat Cultivar Chinese Spring

Bai

2006

Plant Soil

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“…The data are reported as the ratio of grain or forage yield in the unamended plot to that in the lime-amended plot to adjust for differences in yield potential without soil-acidity stress. This methodology was used by a number of researchers to screen crop and forage germplasm for their adaptation to acid soils (Baier et al 1995;Carver and Ownby 1995;Johnson et al 1997;Marschner 1995;Rao et al 1993Rao et al , 1998Rao et al , 2004Rao et al , 2011Rao 2001;Tang et al 2003c;. Field studies conducted on an acid soil in Cameroon by indicated that yield of the soil acidity-tolerant maize cultivar ATP-SR-Y was up to 60 % higher than that of the soil acidity-sensitive cultivar Tuxpeno-Sequia.…”

Section: Interaction Of Aluminium-drought Stresses On Crop Yieldmentioning

confidence: 99%

Interaction of aluminium and drought stress on root growth and crop yield on acid soils

2013

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Background Aluminium (Al) toxicity and drought stress are two major constraints for crop production in the world, particularly in the tropics. The variation in rainfall distribution and longer dry spells in much of the tropics during the main growing period of crops are becoming increasingly important yield-limiting factors with the global climate change. As a result, crop genotypes that are tolerant of both drought and Al toxicity need to be developed. Scope The present review mainly focuses on the interaction of Al and drought on root development, crop growth and yield on acid soils. It summarizes evidence from our own studies and other published/related work, and provides novel insights into the breeding for the adaptation to these combined abiotic stresses. The primary symptom of Al phytotoxicity is the inhibition of root growth. The impeded root system will restrict the roots for exploring the acid subsoil to absorb water and nutrients which is particularly important under condition of low soil moisture in the surface soil under drought. Whereas drought primarily affects shoot growth, effects of phytotoxic Al on shoot growth are mostly secondary effects that are induced by Al affecting root growth and function, while under drought stress root growth may even be promoted. Much progress has recently been made in the understanding of the physiology and molecular biology of the interaction between Al toxicity and drought stress in common bean (Phaseolus vulgaris L.) in hydroponics and in an Al-toxic soil. Conclusions Crops growing on acid soils yield less than their potential because of the poorly developed root system that limits nutrient and water uptake. Breeding for drought resistance must be combined with Al resistance, to assure that drought resistance is expressed adequately in crops grown on soils with acid Al-toxic subsoils.

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“…Seeds were sown on Petri dishes and germinated for 4 days (48-h dark/48-h light cycle). Twelve-day-old plants were cultivated in a low-ionic-strength hydroponic medium (Baier et al, 1995), pH 4.5. The composition of the medium was 10 µM (NH 4 ) 2 SO 4 ; 400 µM CaCl 2 .2H 2 O; 250 µM MgCl 2 .6H 2 O; 40 µM NH 4 NO 3 ; 650 µM KNO 3 .…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

Aluminum triggers broad changes in microRNA expression in rice roots

Lima

Arenhart²,

Margis‐Pinheiro³

et al. 2011

Genet. Mol. Res.

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ABSTRACT. MicroRNAs are small 21-nucleotide RNA molecules with regulatory roles in development and in response to stress. Expression of some plant miRNAs has been specifically associated with responses to abiotic stresses caused by cold, light, iron, and copper ions. In acid soils, aluminum solubility increases, thereby causing severe damage to plants. Although physiological aspects of aluminum toxicity in plants have been well characterized, the molecular mediators are not fully elucidated. There have been no reports about miRNA responses to aluminum stress. Modulation of miRNA expression may constitute a key element to explain the mechanisms implicated in aluminum toxicity and tolerance. We examined the expression of at least one miRNA member from each miRNA family in rice roots of Oryza sativa spp indica cv. Embrapa Taim and Oryza sativa spp japonica cv. Nipponbare under high concentrations of aluminum. Forty-six miRNA families were effectively detected by quantitative PCR. Among these, 13 were down-regulated and six were up-regulated in roots of the Nipponbare cultivar after 8 h of aluminum treatment. In roots of the Embrapa Taim cultivar, five miRNAs were down-regulated and three were upregulated. Analyses of their putative targets suggest that these rice miRNAs are involved in the regulation of various metabolic pathways in response to high concentrations of aluminum.

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Aluminium tolerance in wheat: correlating hydroponic evaluations with field and soil performances*

Cited by 68 publications

References 18 publications

Quantitative Trait Loci for Aluminum Resistance in Wheat Cultivar Chinese Spring

Quantitative Trait Loci for Aluminum Resistance in Wheat Cultivar Chinese Spring

Interaction of aluminium and drought stress on root growth and crop yield on acid soils

Aluminum triggers broad changes in microRNA expression in rice roots

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