Crescimento de cultivares de arroz (Oriza sativa L.) influenciado pela inoculação com bactérias promotoras de crescimento de plantas
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Data
2014-06
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Aiming to evaluate the effect of the inoculation of six strains of plant growth-promoting bacteria
(PGPBs) Burkholderia spp. (B7 and B16), Pseudomonas spp. (P18 and P21) and Rhizobium spp. (R65 and R82) and two
mixtures containing one strain of each genera on the growth of six rice cultivars (BRS Bonança, BRS Aimoré, BRS
Talento, BRSMG Curinga, Japonês and Bolinha). Physiological characteristics of the bacteria were determined on in vitro
assays. Rice cultivars were inoculated with PGPB under greenhouse conditions and cultivated on 1 kg pots filled with soil
on a randomized block design with four replicates. At 60 days after emergence growth parameters related with the shoot
and root were evaluated for rice cultivars. Among the evaluated bacteria only two (B7 and R65) were not able to produce
auxin under in vitro conditions. All strains showed catalase activity and film formation in semisolid medium NFb without
N or nodulation in common bean, indicating the ability of biological nitrogen fixation. Inoculation of PGPBs in rice
provided increases of 10% as compared to the control regarding leaf area and dry mass of shoots and 9% for length and
root dry weight. Among the cultivars BRS Aimoré showed greater interaction with the strains studied and the strain P21 of Pseudomonas spp. promoted significant difference compared to the control for the parameters related with the shoot and
root system.
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Burkholderia, Rhizobium, Pseudomonas, Inoculação, Burkholderia, Rhizobium, Pseudomonas, Inoculation
Citação
FERREIRA, Enderson Petrônio de Brito; KNUPP, Adriano Moreira; MARTIN-DIDONET, Claudia Cristina Garcia. Crescimento de cultivares de arroz (Oriza sativa L.) influenciado pela inoculação com bactérias promotoras de crescimento de plantas. Bioscience Journal, Uberlândia, v. 30, n. 3, p. 655-665, May/Jun. 2014.