Waterlogging Induces High to Toxic Concentrations of Iron, Aluminum, and Manganese in Wheat Varieties on Acidic Soil

Khabaz‐Saberi, Hossein; Setter, T.L.; Waters, I.

doi:10.1080/01904160600649161

Cited by 64 publications

(55 citation statements)

References 15 publications

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“…Waterlogging was identified as a cause of increased soil Mn concentrations in northeastern Victoria (Sparrow and Uren, 1987). Similarly in Western Australia, high to toxic concentrations of Mn were observed in shoot tissues of wheat after waterlogging of an acidic soil (Khabaz-Saberi et al, 2006), giving the first indication of a potential Mn toxicity problem. Further evidence was provided from a pot study using acidic soils from waterlogging-prone areas of the Western Australian wheat-belt (Setter et al 2008).…”

Section: Introductionmentioning

confidence: 98%

Variation of tolerance to manganese toxicity in Australian hexaploid wheat

Khabaz‐Saberi

Rengel

Wilson

et al. 2010

Z. Pflanzenernähr. Bodenk.

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High concentrations of manganese (Mn), iron (Fe), and aluminium (Al) induced in waterlogged acid soils are a potential constraint for growing sensitive wheat cultivars in waterlogged-prone areas of Western Australian wheat-belt. Tackling induced ion toxicities by a genetic approach requires a good understanding of the existing variability in ion toxicity tolerance of the current wheat germplasm. A bioassay for tolerance to high concentration of Mn in wheat was developed using Norquay (Mn-tolerant), Columbus (Mn-intolerant), and Cascades (moderately tolerant) as control genotypes and a range of MnCl 2 concentrations (2, 250, 500, 750, 1000, 2000, and 3000 lM Mn) at pH 4.8 in a nutrient solution. Increasing solution Mn concentration decreased shoot and root dry weight and intensified the development of toxicity symptoms more in the Mnintolerant cv. Columbus than in Norquay and Cascades. The genotypic discrimination based on relative shoot (54% to 79%) and root dry weight (17% to 76%), the development of toxicity symptoms (scores 2 to 4) and the shoot Mn concentration (1428 to 2960 mg kg -1 ) was most pronounced at 750 lM Mn. Using this concentration to screen 60 Australian and 6 wheat genotypes from other sources, a wide variation in relative root dry weight (11% to 95%), relative shoot dry weight (31% to 91%), toxicity symptoms (1.5 to 4.5), and shoot Mn concentration (901 to 2695 mg kg -1 ) were observed. Evidence suggests that Mn tolerance has been introduced into Australian wheat through CIMMYT germplasm having "LERMO-ROJO" within their parentage, preserved either through a co-tolerance to Mn deficiency or a process of passive selection for Mn tolerance. Cultivars Westonia and Krichauff expressed a high level of tolerance to both Mn toxicity and deficiency, whereas Trident and Janz (reputed to be tolerant to Mn deficiency) were intolerant to Mn toxicity, suggesting that tolerance to excess and shortage of Mn are different, but not mutually exclusive traits. The co-tolerance for Mn and Al in ET8 (an Al-tolerant nearisogenic line) and the absence of Mn tolerance in BH1146 (an Al-tolerant genotype from Brazil) limits the effectiveness of these indicator genotypes to environments where only one constraint is induced. Wide variation of Mn tolerance in Australian wheat cultivars will enable breeding genotypes for the genetic solution to the Mn toxicity problem.

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Section: Introductionmentioning

confidence: 98%

Variation of tolerance to manganese toxicity in Australian hexaploid wheat

Khabaz‐Saberi

Rengel

Wilson

et al. 2010

Z. Pflanzenernähr. Bodenk.

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“…In Western Australia, high to toxic concentrations of Al, Mn, and Fe were observed in shoot tissues of wheat after waterlogging of acidic soils (Khabaz-Saberi et al, 2006). Further evidence was provided from a pot study using acidic soils from waterlogging-prone areas of the Western Australian wheat-belt (Setter et al, 2008), justifying the speculation about a link between tolerance to high-to-toxic ion concentrations and the improved wheat performance in waterlogged acidic soils.…”

Section: Introductionmentioning

confidence: 85%

“…1) were sown at 10 mm depth in each polyvinyl chloride (PVC) pot (height 400 mm, diameter 90 mm) in three acidic soils (Tab. 2) for assessment of waterlogging tolerance as described by Khabaz-Saberi et al (2006). A 5 mm-diameter hole was drilled in the side of the pots, 20 mm above the bottom, and connected to an open-end, transparent tubing to allow visual monitoring of the water levels.…”

Section: Waterlogging Tolerance Of Wheat Genotypesmentioning

confidence: 99%

Aluminum, manganese, and iron tolerance improves performance of wheat genotypes in waterlogged acidic soils

Khabaz‐Saberi

Rengel

2010

Z. Pflanzenernähr. Bodenk.

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Waterlogging results in high shoot concentrations of iron (Fe), aluminum (Al), and manganese (Mn) in wheat grown in acidic soil. The verification of this observation in several acidic soils, development of screening techniques, and identification of genotypes differing in tolerance made it possible to test whether tolerance of ion toxicities improves performance of wheat in waterlogged acid soils. Six wheat varieties selected for tolerance/intolerance of Al, Mn, and Fe were grown in three acidic soils (pH CaCl2 4.1-4.3) with or without waterlogging for 40 d. In terms of relative shoot dry weight, Al-, Mn-, and Fe-tolerant genotypes tolerated waterlogging better, outperforming intolerant genotypes by 35%, 53%, and 32%, respectively, across the soils. The Al-tolerant genotype had up to 1.8-fold better root growth than the intolerant genotype under waterlogging. Waterlogging increased DTPA-extractable soil Mn (71%) and Fe (89%), and increased shoot Fe (up to 7.6-fold) and Al (up to 5.9-fold) for different genotypes and soils. The Al-tolerant genotype maintained lower tissue concentrations of Al as compared to intolerant genotypes during waterlogging. Waterlogging delayed crop development but distinctly less so in the tolerant than in the intolerant genotypes, thus jeopardizing the capacity of intolerant genotypes to produce yield in Mediterranean climates with dry finish of the season. Pyramiding multiple ion tolerances into current wheat varieties with desirable agronomic and quality characteristics to enhance their performance under waterlogged acid soils should be considered.

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“…For example Al, Mn, and H toxicities, and Mo deficiencies, are associated with acidic soils (Helyar 1991). Plant-available Al and Mn increase in acid soils in the presence of waterlogging (Khabaz-Saberi et al 2005). In alkaline subsoils, Na, B, Al, and carbonate toxicities have been identified (Rengasamy 2002).…”

Section: Nutrient Availabilitymentioning

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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Waterlogging Induces High to Toxic Concentrations of Iron, Aluminum, and Manganese in Wheat Varieties on Acidic Soil

Cited by 64 publications

References 15 publications

Variation of tolerance to manganese toxicity in Australian hexaploid wheat

Variation of tolerance to manganese toxicity in Australian hexaploid wheat

Aluminum, manganese, and iron tolerance improves performance of wheat genotypes in waterlogged acidic soils

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

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