Attenuation of Manganese-Induced Toxicity in Leucaena leucocephala Colonized by Arbuscular Mycorrhizae

Garcia, Kaio Gráculo Vieira; Filho, Paulo Furtado Mendes; Pinheiro, José Israel; Carmo, Juliette Freitas do; Pereira, Arthur Prudêncio de Araújo; Martins, Claudia Miranda; Abreu, Marcos Giovane Pedroza de; Filho, José de Souza Oliveira

doi:10.1007/s11270-019-4381-9

Cited by 22 publications

(21 citation statements)

References 60 publications

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“…Previous studies have shown that AM fungal-spore formation is affected by nutrient availability [ 64 ]. Detection of Fe in the spores developed under Fe toxicity agrees with previous observations for other metals, such as Cu, Zn and Cd [ 73 , 74 , 75 ], and supports the hypothesis that a survival strategy of AM fungi in metal-contaminated environments is to accumulate the excess metal in some spores of the fungal colony. Iron accumulation in the fungus will reduce plant Fe availability, which will explain, at least partially, the improved performance of mycorrhizal plants, in soils affected by iron mining tailing [ 76 , 77 ].…”

Section: Discussionsupporting

confidence: 88%

Characterization of the NRAMP Gene Family in the Arbuscular Mycorrhizal Fungus Rhizophagus irregularis

López-Lorca¹,

Molina-Luzón²,

Ferrol³

2022

JoF

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Transporters of the NRAMP family are ubiquitous metal-transition transporters, playing a key role in metal homeostasis, especially in Mn and Fe homeostasis. In this work, we report the characterization of the NRAMP family members (RiSMF1, RiSMF2, RiSMF3.1 and RiSMF3.2) of the arbuscular mycorrhizal (AM) fungus Rhizophagus irregularis. Phylogenetic analysis of the NRAMP sequences of different AM fungi showed that they are classified in two groups, which probably diverged early in their evolution. Functional analyses in yeast revealed that RiSMF3.2 encodes a protein mediating Mn and Fe transport from the environment. Gene-expression analyses by RT-qPCR showed that the RiSMF genes are differentially expressed in the extraradical (ERM) and intraradical (IRM) mycelium and differentially regulated by Mn and Fe availability. Mn starvation decreased RiSMF1 transcript levels in the ERM but increased RiSMF3.1 expression in the IRM. In the ERM, RiSMF1 expression was up-regulated by Fe deficiency, suggesting a role for its encoded protein in Fe-deficiency alleviation. Expression of RiSMF3.2 in the ERM was up-regulated at the early stages of Fe toxicity but down-regulated at later stages. These data suggest a role for RiSMF3.2 not only in Fe transport but also as a sensor of high external-Fe concentrations. Both Mn- and Fe-deficient conditions affected ERM development. While Mn deficiency increased hyphal length, Fe deficiency reduced sporulation.

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Section: Discussionsupporting

confidence: 88%

Characterization of the NRAMP Gene Family in the Arbuscular Mycorrhizal Fungus Rhizophagus irregularis

López-Lorca¹,

Molina-Luzón²,

Ferrol³

2022

JoF

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“…AMF species such as Glomus aggregatum, Glomus etunicatum (syn. Claroideoglomus etunicatum), Acaulospora longula, and Acaulospora scrobiculata have been implemented successfully as bioameliorants in planta [15,31,32]. Our finding on G. manihotis (syn.…”

Section: Discussionmentioning

confidence: 70%

“…erefore, the species is well-adapted towards abiotic stress in marginal lands while being proved useful for afforestation and landscaping [13]. Studies have also revealed the significant contribution of AMF to the improved growth performance of L. leucocephala seedlings under stress condition especially in heavy metal contaminated sites [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Improved Salt Tolerance of Lamtoro (Leucaena leucocephala) through the Application of Indigenous Mycorrhiza

Delvian

Hartanto

2021

International Journal of Forestry Research

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Salt stress is one of the serious abiotic stressors which limit the growth and development of important crops in agricultural lands. Arbuscular mycorrhizal fungi (AMF) have been implemented as a strategy to mitigate the adverse effects due to an impact of salt stress through the structural and physiological adjustment. This study aimed to determine a relationship between salinity levels (0, 150, 300, and 450 mM NaCl) and AMF treatments (Glomus manihotis, Glomus etunicatum, and G. manihotis + G. etunicatum) to the salt tolerance of Leucaena leucocephala seedlings in a greenhouse. Salinity reduced the plant height, biomass, and root colonization by AMF. However, the inoculation of AMF, especially the consortium, ameliorated the negative effects by stabilizing the growth performance and supporting the photosynthetic outputs through optimum nutrient and mineral absorptions. These results were indicative through a significant interaction between salinity levels and the types of AMF treatment in all parameters except in the total leaf protein and proline contents from the two-way ANOVA results. Root colonization was highly correlated with the plant height, biomass, and total carbohydrate content with a maximum contribution conferred by the AMF consortium, based on Pearson’s correlation coefficient test and PCA analysis. Our study then showed the positive impact of AMF toward salt tolerance by L. leucocephala with potential application and cultivation in salt-stressed ecosystems.

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“…The lower absorption of Mn in the roots than in the shoots observed in mycorrhized plants can be explained by the existence of a fungal mechanism that controls the absorption of Mn or by the effect of the fungi on the rhizosphere and surrounding soil. Previously, a decrease in Mn toxicity in the presence of AMF in soybeans has been documented (Garcia et al, 2020;Nogueira & Cardoso, 2003). Angiosperms colonized by AMF are often more resistant to excess Mn than plants not colonized by this fungus.…”

Section: Discussionmentioning

confidence: 99%

Mobilization and transfer of nine macro-and micronutrients to Pinus greggii seedlings via arbuscular mycorrhizal fungi

et al. 2021

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Attenuation of Manganese-Induced Toxicity in Leucaena leucocephala Colonized by Arbuscular Mycorrhizae

Cited by 22 publications

References 60 publications

Characterization of the NRAMP Gene Family in the Arbuscular Mycorrhizal Fungus Rhizophagus irregularis

Characterization of the NRAMP Gene Family in the Arbuscular Mycorrhizal Fungus Rhizophagus irregularis

Improved Salt Tolerance of Lamtoro (Leucaena leucocephala) through the Application of Indigenous Mycorrhiza

Mobilization and transfer of nine macro-and micronutrients to Pinus greggii seedlings via arbuscular mycorrhizal fungi

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