Differences in Aluminium Accumulation and Resistance between Genotypes of the Genus Fagopyrum

Klug, Benjamin; Kirchner, Thomas W.; Horst, Walter J.

doi:10.3390/agronomy5030418

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…The genetic variability could affect the growth of the plants and their susceptibility when transferred from a soil substrate to hydroponic condition. The potential impact of genetic variability on plants growing in hydroponics has been reported for Sorghum bicolor and Fagopyrum esculentum (Jordan et al , 1979; Klug et al , 2015), but may not explain the subsequent death of the –Al plants. Furthermore, earlier growth conditions between our seedlings and saplings differed, as the saplings were grown in a greenhouse, experiencing mild winter temperatures in contrast to the seedlings, which were germinated at ambient winter temperatures.…”

Section: Discussionmentioning

confidence: 99%

“…Although the chemical form in which Al is taken up by the plant is unknown, the primary uptake mechanism appears to be transport via the transpiration stream, as the highest concentrations were observed in the leaves of the plants. The most commonly reported forms of Al complexes detected in the xylem sap of Al accumulators are Al citrate, malate, oxalate and fluorine, as these molecules are known to have a strong binding affinity to Al (Watanabe and Osaki, 2001; Flaten, 2002; Morita et al , 2004; Satoh, 2006; Klug et al , 2015). The root represents the only organ that is directly in contact with soluble Al, explaining the high concentrations within the root tissue.…”

Section: Discussionmentioning

confidence: 99%

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The effects of aluminium on plant growth in a temperate and deciduous aluminium accumulating species

Schmitt¹,

Watanabe²,

Jansen³

2015

AoB PLANTS

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Although aluminium (Al) is toxic for the vast majority of angiosperm plants, high concentrations of Al (i.e., < 1,000 mg·kg-1 dry mass) are found in some plants. Here, we investigate the Al accumulation behaviour in the temperate, deciduous species Symplocos paniculata, which belongs to a mainly tropical genus known to accumulate high levels of Al in its aboveground tissues. Based on a growing experiment in hydroponics with and without Al, we show that S. paniculata has the capacity to accumulate Al and that the absence of Al in the nutrient solution has a negative impact on the performance of saplings.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The effects of aluminium on plant growth in a temperate and deciduous aluminium accumulating species

Schmitt¹,

Watanabe²,

Jansen³

2015

AoB PLANTS

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“…The genus Fagopyrum including common buckwheat ( Fagopyrum esculentum ), tartary buckwheat ( Fagopyrum tataricum ) and wild buckwheat ( Fagopyrum homotropicum ) shows high tolerance to aluminium (Al) ion toxicity and accumulates high Al in the leaves without showing any toxicity symptoms (Ma et al ., ; Klug et al ., ; Wang et al ., ). Physiological studies have revealed that both external and internal detoxification mechanisms are involved in high Al tolerance in buckwheat (Ma et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Functional characterization of two half‐size ABC transporter genes in aluminium‐accumulating buckwheat

et al. 2017

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Buckwheat (Fagopyrum esculentum Moench) is able to detoxify high aluminium (Al) internally by sequestering it to the vacuoles in the leaves; however, the molecular mechanisms underlying this sequestration are unknown. We performed proteomic analysis with the leaf tonoplast-rich fraction and identified two half-size ABC transporters; FeASL1.1 and FeALS1.2. We investigated the gene expression patterns and subcellular localization. To demonstrate their physiological role, we expressed FeALS1.1 or FeALS1.2 in the Arabidopsis atals1 mutant under the control of AtALS1 promoter. FeALS1.1 expression was upregulated by Al in both the leaves and the roots, and its expression level in the roots was six times higher than its homologous gene (AtALS1) of Arabidopsis. FeALS1.2 expression, however, was not affected by Al but showed a 39 times higher expression level than AtALS1 in the leaves. When FeALS1.1 or FeALS1.2 was expressed in atals1, both of them recovered their Al tolerance through altering the subcellular localization of Al in root cells. Taken together, our results indicate that FeALS1.1 and FeALS1.2 are involved in the internal detoxification of Al in the roots and leaves, respectively, by sequestering Al into the vacuoles. Their high expression is probably required for high Al tolerance in buckwheat.

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“…Genotypic variation in plant sensitivity has been well documented, but mechanisms for resistance remain under investigation [18,19]. Roots are an important target for Al-induced damage, and inhibition of root growth occurs rapidly in response to exposure of the root tip to aluminum [17,20].…”

Section: Border Cell Trapping Of Aluminummentioning

confidence: 99%

Extracellular Trapping of Soil Contaminants by Root Border Cells: New Insights into Plant Defense

et al. 2016

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Soil and water pollution by metals and other toxic chemicals is difficult to measure and control, and, as such, presents an ongoing global threat to sustainable agriculture and human health. Efforts to remove contaminants by plant-mediated pathways, or "phytoremediation", though widely studied, have failed to yield consistent, predictable removal of biological and chemical contaminants. Emerging research has revealed that one major limitation to using plants to clean up the environment is that plants are programmed to protect themselves: Like white blood cells in animals, border cells released from plant root tips carry out an extracellular trapping process to neutralize threats and prevent injury to the host. Variability in border cell trapping has been found to be correlated with variation in sensitivity of roots to aluminum, and removal of border cell results in increased Al uptake into the root tip. Studies now have implicated border cells in responses of diverse plant roots to a range of heavy metals, including arsenic, copper, cadmium, lead, mercury, iron, and zinc. A better understanding of border cell extracellular traps and their role in preventing toxin uptake may facilitate efforts to use plants as a nondestructive approach to neutralize environmental threats.

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Differences in Aluminium Accumulation and Resistance between Genotypes of the Genus Fagopyrum

Cited by 6 publications

References 47 publications

The effects of aluminium on plant growth in a temperate and deciduous aluminium accumulating species

The effects of aluminium on plant growth in a temperate and deciduous aluminium accumulating species

Functional characterization of two half‐size ABC transporter genes in aluminium‐accumulating buckwheat

Extracellular Trapping of Soil Contaminants by Root Border Cells: New Insights into Plant Defense

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