Mitigation effects of mycorrhiza on boron toxicity in wheat (Triticum durum) plants

Abstract

A greenhouse study was conducted to investigate the effect of mycorrhiza on wheat (Triticum durum) boron (B) uptake under excessive B concentrations. Three levels of B (0, 3, and 6 mg B litre -1 ) were added to pots with or without mycorrhiza. Plant nutrients were added as Hoagland nutrient solution. In general, additions of B with or without mycorrhiza decreased wheat relative yield and increased shoot and root B concentrations. B concentrations in shoots ranged from 30.8 to 589 mg kg -1 . The highest shoot B concentrations were with the highest B treatments (6 mg B litre -1 ), whereas the lowest concentrations were in the control (0 mg B litre -1 ). Mycorrhiza inoculation significantly improved relative yield of unstressed (control) plants, but those increases in relative yield of Bstressed plants were not significant. In general, mycorrhiza inoculation decreased shoot and root B concentrations and uptake. Wheat growing at high B concentrations (6 and 3 mg B litre -1 ) with or without mycorrhiza showed leaf edge burning and necrosis compared with control treatments. The data suggested that mycorrhiza infection can prevent plants from an excessive concentration and uptake of B although that did not improve plant yield. Further evaluation is needed for the effects of mychorriza inoculation on B toxicity.

Elucidating the Possible Involvement of Maize Aquaporins in the Plant Boron Transport and Homeostasis Mediated by Rhizophagus irregularis under Drought Stress Conditions

“…In relation to this, ectomycorrhizal fungi were found to enhance B uptake in Betula pendula, but the effect was mild and dependent on fungal species [44]. In contrast, mycorrhization decreased uptake of B and concentrations in wheat plants under both, with and without B supply [45]. In a recent study with citrus rootstocks and R. irregularis, the symbiosis decreased the toxicity of high B application, accumulating less B in leaves [7].…”

Nutrient interactions and arbuscular mycorrhizas: a meta-analysis of a mycorrhiza-defective mutant and wild-type tomato genotype pair

“…Also, it appears from this meta-analysis that the 76R genotype can, to some extent, resist B-364 accumulation when Zn is deficient, compared to the rmc genotype. The ability of AM to reduce B-365 toxicity in wheat has been observed previously (Sonmez et al 2009); however, the effect of AM on the…”

Boron nutrition of rice in different production systems. A review

“…Boron deficiency adversely affects the fungi-mycorrhizal interaction resulting in decreased transport of carbohydrates (Middleton et al 1978) to plant roots by altering IAA oxidase and auxin levels (Van de Vender and Currier 1977). Mycorrhiza (Glomus clarum) inoculation helps to reduce B toxicity by decreasing shoot B concentration (Sonmez et al 2009).…”