Triagem do potencial de promoção do crescimento vegetal de rizobactérias isoladas de alface
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2017
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Resumo
Terrestrial plants are colonized by a large number of microorganisms. Rhizopheric
microorganisms, which colonize root adjacencies, provide a large amount of nutrients
through the decomposition of organic matter and nutrient cycling, as well as
improving root architecture and protecting the host against phytopathogens. Thus,
the objective of this work was to screen bacteria isolated from lettuce rhizosphere,
Lactuca sativa, with the best capacity to promote plant growth. For this purpose, 6
strains were selected from the bacterioteca and triaged for idol-acetic acid (AIA)
production, phosphate solubilization, nitrogen fixation, enzyme production, cellulases
and chitinases, biofilm formation and, finally, root colonization. All isolates were
capable of producing at least one characteristic analyzed, as well as they were able
to produce biofilm. The isolated AG4 has obtained the highest phosphate
solubilization index, the isolated AG7 has produced the highest number of plant
growth factors. With the exception of AG1, all others were able to colonize lettuce
roots. Thus, the isolates Enterobacter cloacae (AG3), Enterobacter cancerogenus
(AG5), and Enterobacter ludwigii (AG7) are good candidates for inoculants, because
beyond their capacity of colonize the host roots, they are produce a high number of
plant growth promoters.
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Fosfato, Lactuca sativa, Nitrogênio, Phosphate, Nitrogen
Citação
SOARES, Renan et al. Triagem do potencial de promoção do crescimento vegetal de rizobactérias isoladas de alface. Agrarian Academy, [S. l.], v. 4, n. 7, p. 428-438, 2017. Disponível em: https://conhecer.org.br/ojs/index.php/agrarian/article/view/5145. Acesso em: 18 nov. 2024.