Variation for tolerance to high concentration of ferrous iron (Fe2+) in Australian hexaploid wheat

Khabaz‐Saberi, Hossein; Rengel, Zed; Wilson, Robin; Setter, T.L.

doi:10.1007/s10681-009-0069-3

Cited by 29 publications

(18 citation statements)

References 21 publications

(11 reference statements)

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“…Wheat genotype Siete Cerros had marginally lower tissue Fe concentration than BH1146 (data not presented), which is consistent with a previous study (Khabaz-Saberi et al, 2010a) in which genotypes with high Fe tolerance had a higher relative root dry weight and a lower concentration of Fe in shoot tissues than intolerant ones. Differential tolerance of Siete Cerros and BH1146 to Al and Mn toxicity limited their application to environments where only one stress is present.…”

Section: Waterlogging Tolerance Of Wheat Genotypessupporting

confidence: 92%

“…In the earlier study (Khabaz-Saberi et al, 2010a), the shoot Fe concentration was higher in Fe-intolerant BH1146 than in Fe-tolerant Siete Cerros in high-Fe treatments (≥ 625 lM Fe); hence, it appeared that Fe tolerance may be reliant on Fe exclusion. Similarly, Fe-tolerant rice cultivars absorbed by roots and/or transported less Fe from roots to leaves than Fe-intolerant ones, indicating the presence of a physiological avoidance/exclusion mechanism (Audebert and Sahrawat, 2000).…”

Section: Waterlogging Tolerance Of Fe-tolerant Vs Feintolerant Genotypementioning

confidence: 82%

“…www.plant-soil.com ); at this concentration, maximum discrimination between Siete Cerros (Fe-tolerant) and BH1146 (Fe-intolerant) was observed (Khabaz-Saberi et al, 2010a). The experimental conditions, duration, maintenance, and the measured parameters were as described above for the Mn-tolerance assay, except for the pH of solution, which was maintained at 4.5 throughout the study.…”

Section: Verification Of Mnmentioning

confidence: 99%

“…In the Australian wheat-breeding programs, the observed variation in Fe tolerance is unlikely to be due to a link between Fe tolerance and an agronomic trait of interest, but rather due to an indirect selection process through multilocation testing of breeding materials (Khabaz-Saberi et al, 2010a). …”

Section: Waterlogging Tolerance Of Wheat Genotypesmentioning

confidence: 99%

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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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Section: Waterlogging Tolerance Of Wheat Genotypessupporting

confidence: 92%

Section: Waterlogging Tolerance Of Fe-tolerant Vs Feintolerant Genotypementioning

confidence: 82%

Section: Verification Of Mnmentioning

confidence: 99%

Section: Waterlogging Tolerance Of Wheat Genotypesmentioning

confidence: 99%

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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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“…A superior exclusion of Fe from shoots is associated with Fe tolerance in wheat (Khabaz‐Saberi et al . ) and rice (Audebert & Sahrawat ). However, Quantitative Trait Loci (QTL) mapping in rice revealed that Fe tolerance is a multigenic trait (Wan et al .…”

Section: Regulation Of Membrane‐transport Activity In Roots In Floodementioning

confidence: 99%

Membrane transporters mediating root signalling and adaptive responses to oxygen deprivation and soil flooding

Shabala

Barceló

et al. 2014

Plant Cell & Environment

144

107

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This review provides a comprehensive assessment of a previously unexplored topic: elucidating the role that plasma- and organelle-based membrane transporters play in plant-adaptive responses to flooding. We show that energy availability and metabolic shifts under hypoxia and anoxia are critical in regulating membrane-transport activity. We illustrate the high tissue and time dependence of this regulation, reveal the molecular identity of transporters involved and discuss the modes of their regulation. We show that both reduced oxygen availability and accumulation of transition metals in flooded roots result in a reduction in the cytosolic K(+) pool, ultimately determining the cell's fate and transition to programmed cell death (PCD). This process can be strongly affected by hypoxia-induced changes in the amino acid pool profile and, specifically, ϒ-amino butyric acid (GABA) accumulation. It is suggested that GABA plays an important regulatory role, allowing plants to proceed with H2 O2 signalling to activate a cascade of genes that mediate plant adaptation to flooding while at the same time, preventing the cell from entering a 'suicide program'. We conclude that progress in crop breeding for flooding tolerance can only be achieved by pyramiding the numerous physiological traits that confer efficient energy maintenance, cytosolic ion homeostasis, and reactive oxygen species (ROS) control and detoxification.

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Role of Nutrients in Plant Growth and Development

Shrivastav

Prasad

Singh

et al. 2020

Contaminants in Agriculture

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Variation for tolerance to high concentration of ferrous iron (Fe2+) in Australian hexaploid wheat

Abstract: High concentration of reduced iron (Fe 2?

Cited by 29 publications

References 21 publications

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

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

Membrane transporters mediating root signalling and adaptive responses to oxygen deprivation and soil flooding

Role of Nutrients in Plant Growth and Development

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