Abstract

PALMERO, F et al. Early wheat growth (Triticum aestivum L.) modifications in the presence of Azospirillum brasilense and Pseudomonas psychrophila. Agriscientia [online]. 2020, vol.37, n.1, pp.53-62.  Epub June 01, 2020. ISSN 1668-298X.  http://dx.doi.org/10.31047/1668.298x.v37.n1.27564.

Azospirillum spp. and Pseudomonas spp. are plant growth promoting rizobacteria that enhance crop growth and productivity. The aim of this article was to compare the effects of Azospirillum brasilense and Pseudomonas psychrophila over early wheat growth in contrasted fertility conditions. This research was carried out under controlled growth conditions combining inoculation and fertility with P and K in sterile substrate. Root length 10 days after sowing (DAS) and above ground and root biomass accumulation after 10 and 40 DAS were evaluated. 10 DAS, when inoculated, radicle length increased on average 8 %, while total biomass increased 6.3 % when inoculated with A. brasilense and 4.9 % when inoculated with P psychrophila. 40 DAS, both rizobacteria increased root growth in 21 %. 10 DAS and 40 DAS, biomass accumulation was independent from substrate fertility, suggesting that the presence of A. brasilense and P psychrophila are relevant during implantation and early crop growth.

Keywords : biomass; bioinputs; mineral nutrition; plant growth-promoting rizobacteria; potassium; phosphorus.

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