Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/30326
Title: Formononetin stimulates mycorrhizal fungi colonization on the surface of active root nodules in soybean
Keywords: Glycine max L.
Biostimulant
Nodule colonization
Root symbiosis
Nitrogen fixation
Mycorrhiza
Formononetin
Bioestimulante
Colonização Nodule
Simbiose raiz
Fixação de nitrogênio
Micorrizas
Formononetina
Issue Date: Jan-2017
Publisher: Springer
Citation: SILVA, J. S. da et al. Formononetin stimulates mycorrhizal fungi colonization on the surface of active root nodules in soybean. Symbiosis, Philadelphia, v. 71, n. 1, p. 27-34, Jan. 2017.
Abstract: The symbiosis of Leguminosae with arbuscular mycorrhizal fungi (AMF) and N2-fixing nodulating bacteria (NFNB) can occur simultaneously, forming a tripartite symbiosis. In particular, AMF can colonize root nodules, although this interaction is not yet well elucidated, especially with regard to nodule activity and to the influence of external factors, such as biostimulants. In this study, we hypothesized that the application of the flavonoid formononetin, used to stimulate root colonization by native AMF, increases the AMF colonization of soybean (Glycine max) root nodules, especially under low availability of phosphorus (P). To test this hypothesis, we performed a field experiment in randomized blocks in a 4 × 3 factorial design, with 4 treatments of formononetin (0, 0.46, 0.92 and 1.84 g per kg seed) and 3 of P (0, 60 and 120 kg ha−1) with 5 replicates. Nodules and roots were collected during the R2 stage (full flowering) and evaluated with respect to AMF colonization. Formononetin stimulated mycorrhizal fungi colonization of active nodules, especially when no P was applied, as also observed for AMF root colonization; however, it had no effect with 60 and 120 kg P ha−1. Thus, the application of formononetin increases surface AMF colonization of active nodules and roots, but its effect disappears with an increase in P and the inactivity of the nodule.
URI: https://link.springer.com/article/10.1007/s13199-016-0408-9
http://repositorio.ufla.br/jspui/handle/1/30326
Appears in Collections:DCS - Artigos publicados em periódicos

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