Tolerance of some wheat varieties to boron toxicity

Nejad, Seyed Ali Ghaffari; Savaghebi, G.; Farahbakhsh, Mohsen; Amiri, R Maali; Rezaei, Hassan

doi:10.1556/0806.43.2015.009

Cited by 7 publications

(2 citation statements)

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“…The generally accepted opinion is that tolerant barley and wheat genotypes have lower boron concentration in all organs, regardless of the type of the experiment and soil or nutrient solution boron concentrations [33,[69][70][71]221]. However, variability in shoot boron concentration of barley, bread, and durum wheat genotypes tolerant to excess boron was reported [72].…”

Section: Boron Toxicitymentioning

confidence: 99%

Boron Toxicity and Deficiency in Agricultural Plants

Brdar-Jokanović

2020

IJMS

281

119

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Boron is an essential plant micronutrient taken up via the roots mostly in the form of boric acid. Its important role in plant metabolism involves the stabilization of molecules with cis-diol groups. The element is involved in the cell wall and membrane structure and functioning; therefore, it participates in numerous ion, metabolite, and hormone transport reactions. Boron has an extremely narrow range between deficiency and toxicity, and inadequate boron supply exhibits a detrimental effect on the yield of agricultural plants. The deficiency problem can be solved by fertilization, whereas soil boron toxicity can be ameliorated using various procedures; however, these approaches are costly and time-consuming, and they often show temporary effects. Plant species, as well as the genotypes within the species, dramatically differ in terms of boron requirements; thus, the available soil boron which is deficient for one crop may exhibit toxic effects on another. The widely documented intraspecies genetic variability regarding boron utilization efficiency and toxicity tolerance, together with the knowledge of the physiology and genetics of boron, should result in the development of efficient and tolerant varieties that may represent a long-term sustainable solution for the problem of inadequate or excess boron supply.

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Section: Boron Toxicitymentioning

confidence: 99%

Boron Toxicity and Deficiency in Agricultural Plants

Brdar-Jokanović

2020

IJMS

281

119

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“…Variability in RB and SB accumulation in the studied Aegilops accessions under the two toxic B treatments can be observed in Figures 3I,J. In general, B toxicity tolerance in plants is considered to be associated with its capacity to maintain low B concentrations in the tissues (Cartwright et al, 1986;Nable, 1988;Nable et al, 1990Nable et al, , 1997Moody et al, 1993;Hayes and Reid, 2004;Rehman et al, 2006;Sutton et al, 2007;Ghaffari Nejad et al, 2015). However, this argument has been rejected by a number of studies where the differences in the behavior toward B toxicity are not associated with B concentration in the tissues (Mahalakshmi et al, 1995;Yau et al, 1995;Torun et al, 2002;Brdar-Jokanovic, 2020).…”

Section: Impact Of B Toxicity Stress On the Root-shoot B Accumulationmentioning

confidence: 99%

Variability in Physiological Traits Reveals Boron Toxicity Tolerance in Aegilops Species

et al. 2021

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Boron (B) is an important micronutrient required for the normal growth and development of plants. However, its excess in the soil causes severe damage to plant tissues, which affects the final yield. Wheat, one of the main staple crops, has been reported to be largely affected by B toxicity stress in arid and semi-arid regions of the world. The prevalence of B toxicity stress can be addressed by utilizing wild wheat genotypes with a variant level of stress tolerance. Wild wheat relatives have been identified as a prominent source of several abiotic stress-tolerant genes. However, Aegilops species in the tertiary gene pool of wheat have not been well exploited as a source of B toxicity tolerance. This study explores the root and shoot growth, proline induction, and extent of lipid peroxidation in 19 Aegilops accessions comprising 6 different species and the B-tolerant check wheat cultivar Bolal 2973 grown under Control (3.1 μM B), toxic (1 mM B), and highly toxic (10 mM B) B stress treatment. B toxicity stress had a more decisive impact on growth parameters as compared to the malondialdehyde (MDA) and proline content. The obtained results suggested that even the genotypes with high shoot B (SB) accumulation can be tolerant to B toxicity stress, and the mechanism of B redistribution in leaves should be studied in detail. It has been proposed that the studied Aegilops accessions can be potentially used for genetically improving the B toxicity-tolerance trait due to a high level of variation in the response toward high B toxicity. Though a number of accessions showed suppression in the root and shoot growth, very few accessions with stress adaptive plasticity to B toxicity stress leading to an improvement of shoot growth parameters could be determined. The two accessions, Aegilops biuncialis accession TGB 026219 and Aegilops columnaris accession TGB 000107, were identified as the potential genotypes with B toxicity stress tolerance and can be utilized for developing a pre-breeding material in B tolerance-based breeding programs.

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