Melhoramento do trigo: XXX. Avaliação de linhagens com tolerância a toxicidade de alumínio, manganês e ferro em condições de campo

Camargo, Carlos Eduardo de Oliveira; Felício, João Carlos; Filho, Antônio Wilson Penteado Ferreira; Freitas, José Guilherme de; Ramos, Valdir Josué; Kanthack, Ricardo Augusto Dias; Castro, Jairo Lopes de

doi:10.1590/s0006-87051995000100009

Cited by 9 publications

(1 citation statement)

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“…In wheat, Fe toxicity is not extensively reported, and is mainly described for flooded soils, where it can co-occur with Mn toxicity, in years of heavy rainfall. The impairment of wheat growth and a yellowing of older leaves are the most commonly reported symptoms [16,17].…”

Section: Introductionmentioning

confidence: 99%

Aluminium, Iron and Silicon Subcellular Redistribution in Wheat Induced by Manganese Toxicity

et al. 2021

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Acidic soils can promote the bioavailability of Al, Mn, and Fe to toxic levels, reducing crop growth and productivity. Symptoms of metal excess/deficit are dependent on the chemical composition of the soil solution and of plant tissues. In the present study, the concentration and subcellular distribution of Al, Mn, Fe, and Si (known to alleviate metal stress) were quantified through inductively coupled plasma mass spectrometry (ICP-MS) in roots and shoots of wheat grown in acidic soils with rising levels of Mn. In control acidic soil, wheat showed high concentrations of Al, Mn, and Fe. After Mn supplementation, bioavailable Al, Fe, and Si levels increased in the soil solution, but plant uptake ratio decreased. Root Mn levels increased, while those of Al, Fe, and Si decreased. Although elements were increasingly translocated to the shoot, root Al and Fe concentrations were 10-fold higher than those in the shoot. At the highest Mn concentration supplied, Al, Fe, and Si proportions increased in the organelles, while Mn proportion increased in the vacuole. High bioavailable Mn levels disrupt metal homeostasis in wheat grown in acidic soils, influencing element subcellular distribution. Symptoms of metal toxicity result from interactions between several elements, and therefore a comprehensive chemical analysis of soil solution and plant tissues contributes to a more accurate understanding of their uptake dynamics and their agronomic implications.

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Section: Introductionmentioning

confidence: 99%

Aluminium, Iron and Silicon Subcellular Redistribution in Wheat Induced by Manganese Toxicity

et al. 2021

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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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Phenotyping for Problem Soils

Rajendran

Patil

Kumar

2015

Phenomics in Crop Plants: Trends, Options and Limitations

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Problem soils have serious physical and chemical constraints, impose stress on crops under cultivation and reduce its yield and productivity. Research efforts towards the development of tolerant cultivars for problem soils have gained all the advances from research areas of genomics but precision phenotyping still remains challenging. This chapter illustrates different phenotyping methods which have been used to screen genotypes against various problem soil conditions, discusses bottlenecks in the classical methods of phenotyping and exemplifies the application of high-throughput (HT) phenotyping in the current field of interest through red, green, blue (RGB) imaging, infrared thermography, chlorophyll fluorescence and hyperspectral imaging technologies. The HT phenotyping is a useful technique, and when it is empowered with other tools such as high-density linkage mapping and association mapping, it can accelerate the breeding process.

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Melhoramento do trigo: XXX. Avaliação de linhagens com tolerância a toxicidade de alumínio, manganês e ferro em condições de campo

Cited by 9 publications

References 10 publications

Aluminium, Iron and Silicon Subcellular Redistribution in Wheat Induced by Manganese Toxicity

Aluminium, Iron and Silicon Subcellular Redistribution in Wheat Induced by Manganese Toxicity

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

Phenotyping for Problem Soils

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