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Nitric oxide precursors prevent Al-triggered auxin flow inhibition in Triticum aestivum roots

Aluminum (Al) is an element widely distributed in soils, even though Al(3+) is one of the most detrimental cations to plant growth. The effect of nitric oxide (NO) precursors on indole-3-acetic acid (IAA) flow towards roots upon Al treatment is herein reported using two Triticum aestivum (wheat) cul...

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Detalles Bibliográficos
Autores principales: Faria-Lopes, Raquel O., Muniz, Dandara R., Chaves, Izabel S., França, Marcel G.C., Modolo, Luzia V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6300571/
https://www.ncbi.nlm.nih.gov/pubmed/30581610
http://dx.doi.org/10.1016/j.jare.2018.08.002
Descripción
Sumario:Aluminum (Al) is an element widely distributed in soils, even though Al(3+) is one of the most detrimental cations to plant growth. The effect of nitric oxide (NO) precursors on indole-3-acetic acid (IAA) flow towards roots upon Al treatment is herein reported using two Triticum aestivum (wheat) cultivars with recognized differential Al tolerance. Roots of Al-tolerant seedlings with no treatment (control) accumulated higher amounts of NO than Al-sensitive ones. The treatment with Al further stimulated NO production in root cells while root exposure to NO(3)(−), L-arginine (Arg) or the NO donor S-nitrosoglutathione (GSNO) decreased both Al and lipid peroxide accumulation in both cultivars. Regardless of the cultivar, NO(3)(−), Arg or GSNO prevented the blockage of IAA flow towards roots. Overall, the treatment of wheat roots with NO precursors prior to Al treatment effectively guarantees normal IAA flow towards roots, a condition that favors the organ’s growth and development.