Plant growth promotion by four species of the genus Burkhoderia

Abstract

Background and aims The genus Burkholderia is highly diverse and may mediate plant growth via several mechanisms. The current study evaluates the role of strains from four Burkholderia species in maize growth promotion. Methods Twenty three strains of diazotrophic Burkholderia species were applied to two maize genotypes (SHS5050 and BRS4157) under greenhouse and field conditions. Strains were tested for growth promotion in greenhouse during 40 days. Strain 41 from B. silvatlantica was used under field conditions. Parameters evaluated: biomass accumulation, N and root measurements in pots and grain yield, N % and N in the grains under field conditions. Results Eleven strains were evaluated under soil substrate. The inoculation of the hybrid SHS5050 showed root biomass improvement using three strains, namely M130, M209 and PPe7. The highest acetylene reduction activity was observed in strain 41 from B. silvatlantica. Strain 41 from B. silvatlantica improved plant dry mass on both genotypes. This strain produced 31 % more aerial tissue and 7 % more root dry mass in the BRS4157 variety than it did in the control. Both genotypes planted at Seropédica, RJ, produced 7 % more grains under field conditions and the variety produced 10.9 % more grains in comparison to the non-inoculated control. Conclusion Strain 41 from B. silvatlantica showed beneficial plant-growth promotion of maize under greenhouse and field experiments specially in a low fertility soil.

Diversity and Efficiency of Rhizobia Communities from Iron Mining Areas Using Cowpea as a Trap Plant

“…This genus represented 46 % of the sequenced isolates, occurring in all types of vegetation. The selection of strains, such as those of the genus Burkholderia, which are able to adapt to certain soil conditions, can improve yield under field conditions and reduce the use of N fertilizers and, consequently, agricultural costs (Alves et al, 2016). Reis Jr et al (2010) analyzed the nodulation and biological N 2 fixation of Mimosa species in the neotropical savanna and Caatinga biomes in Brazil.…”

Phosphorus-solubilizing bacterial endophytes, Burkholderia silvatlantica L-VT09 and N-VT06, in improving characteristics of acid sulfate soil and pineapple yield

“…Besides, a genus of bacterial endophytes, Burkholderia sp., stimulates growth (Mannaa et al, 2018) and yield of cultivars (Divjot et al, 2021). The improvement of growth and yield of the plants can be attributed to not only the amelioration of soil fertility, as mentioned previously, but also the ability to produce plant growth-promoting substances, such as IAA and siderophores by the B. silvatlantica species (Alves et al, 2016).…”

Characterisation of bacteria from the cultures of a Chlorella strain isolated from textile wastewater and their growth enhancing effects on the axenic cultures of Chlorella vulgaris in low nutrient media

“…vulgaris 211/11B. Many of these bacterial strains are known to exhibit plant growth properties (Hayat et al 2010;Kumar and Gera, 2014;Cecagno et al 2015;Alves et al 2016;Khan et al 2017), with several also able to promote the growth of microalgae. For example, Brevundimonas sp.…”

“…Certain species of bacteria have been shown to affect the growth rate and quality of the algae (Cho et al 2015), can boost lipid production (Woertz et al 2009;Cho et al 2015) and can also aid in bio-flocculation, thus reducing the costs associated with harvesting biomass (Lee et al 2013;Kim et al 2014a). There are many reports of the growth enhancement properties microalgae, including Rhodobacteriales in the marine environment (Buchan et al 2014;Amin et al 2015), and Burkholderiales, Caulobacterales, Rhizobiales, Rhodospirillales and Sphingomonadales (Hayat et al 2010;Krohn-Molt et al 2013;Kumar and Gera 2014;Cecagno et al 2015;Alves et al 2016;Khan et al 2017)in freshwater. In several cases this has been attributed to the production and exchange of nutrients beneficial for the growth of the algae and/or the bacteria.…”