Plant growth-promoting bacteria improve growth and nitrogen metabolism in maize and sorghum

Aquino, João Pedro Alves de; Antunes, Jadson Emanuel Lopes; Bonifácio, Aurenívia; Rocha, Sandra Mara Barbosa; Amorim, Marineide Rodrigues do; Neto, Francisco Alcântara; Araújo, Ademir Sérgio Ferreira de

doi:10.1007/s40626-021-00209-x

Cited by 10 publications

(3 citation statements)

References 45 publications

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“…Antunes et al[40] (2017) treated sugarcane with seven similar agents isolated from Bacillus and obtained similar results, reporting that Herbaspirillum seropedicae, Paenibacillus sp., and Burkholderia sp. and other PGPR can increase N fixation, dry matter accumulation, and crop yield in sorghum and maize[41] (Aquino et al, 2021). In this experiment, the number of leaves, plant height, stem thickness, leaf area, dry matter accumulation in each organ, G value, and SI of tomato seedlings increased and then decreased with the increased concentration of Bacillus methylotrophicus.…”

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confidence: 64%

Effect of Bacillus methylotrophicus on Tomato Plug Seedling

et al. 2022

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Tomato production is gradually shifting to modern production, which requires the factorization of tomato seedlings to shorten the seedling cycle and improve the seedling quality. Bacillus methylotrophicus, as a biofertilizer for plant growth-promoting rhizobacteria, can promote plant growth and enhance native plant defenses. However, reports on the role of this type of bacterial agent in horticultural crop seedlings are limited. We investigated the effects of different dosages of Bacillus methylotrophicus (0.00, 0.25, 0.50, 0.75, 1.00, 1.25, and 1.50 g/strain) on tomato plug seedlings and aimed to screen out the suitable dosage of Bacillus methylotrophicus for tomato seedlings in 50-hole cavity trays. In this experiment, with the increase in Bacillus methylotrophicus, the number of leaves, plant height, stem thickness, leaf area, dry matter accumulation in each organ, growth function (G value), and seedling strength index of tomato seedlings showed an increasing trend, followed by a decreasing one. The appropriate dosage (0.50–1.25 g/strain) of bacterial agent increased the activities of the substrates urease, sucrase, and catalase, thus forming a good microbial community to maintain the balance of organic and inorganic carbon and guaranteeing the normal development of the root system. Meanwhile, under the treatment of 1.00 and 1.25 g/strain of inoculum, the absorption range of tomato roots increased, more nitrogen, phosphorus, and potassium were absorbed from the substrate, and more nutrients were transported from the underground to the above-ground parts, which promoted shoot elongation and thickening of the shoots, increased the leaf number and dry matter accumulation, and improved the seedling quality. In this study, the mechanism of action of this microbial product on tomato seedlings was studied from the perspective of nutrient uptake and supply, and a sowing root application of 1.00 g/strain of Bacillus methylotrophicus in 50-hole cavity trays can improve the quality of tomato seedlings.

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confidence: 64%

Effect of Bacillus methylotrophicus on Tomato Plug Seedling

et al. 2022

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“…Moreover, the increase in plant height, and shoot fresh and dry biomass of maize with inoculation of PGPR in the present study were at par with Khalid et al (2004) and Pereira et al (2020) and they conclude that the improvement was due to the growth hormones related substance produced by PGPR and better nutrient status of maize. The improvement in plant height, and shoot and root dry biomasses might be due to the enhanced nutrient uptake and partitioning especially higher nitrogen and phosphorus are responsible for growth and development at the early stage of the maize (Aquino et al, 2021). Pearson's correlation of the growth parameters and nutrient contents of maize in pot trial and field is presented in supplementary data (Tables S2-S4) and also revealed that there was a positive correlation between the mineral nutrients uptake and maize growth parameters, which justifies the increased growth of maize attributed to the more mineral uptake.…”

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confidence: 99%

Combating iron and zinc malnutrition through mineral biofortification in maize through plant growth promoting Bacillus and Paenibacillus species

et al. 2023

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IntroductionThe burgeoning population of the world is causing food insecurity not only by less food availability but also by the malnutrition of essential nutrients and vitamins. Malnutrition is mostly linked with food having micronutrients lower than the optimal concentration of that specific food commodity and becoming an emerging challenge over the globe. Microbial biofortification in agriculture ensures nutritional security through microbial nitrogen fixation, and improved phosphate and zinc solubilization, which increase the uptake of these nutrients. The present study evaluates the novel plant growth-promoting rhizobacteria (PGPR) to biofortify maize gain.MethodsFor this purpose, a pot and two field experiments for maize were conducted. PGPRs were applied alone and in combination for a better understanding of the biofortification potential of these strains. At physiological maturity, the growth parameters, and at harvest, the yield, microbial population, and nutritional status of maize were determined.Results and discussionResults revealed that the consortium (ZM27+ZM63+S10) has caused the maximum increase in growth under pot studies like plant height (31%), shoot fresh weight (28%), shoot dry weight (27%), root fresh (33%) and dry weights (29%), and microbial count (21%) in the maize rhizosphere. The mineral analysis of the pot trial also revealed that consortium of ZM27+ZM63+S10 has caused 28, 16, 20, 11 and 11% increases in P, N, K, Fe, and Zn contents in maize, respectively, as compared to un-inoculated treatment in pot studies. A similar trend of results was also observed in both field trials as the consortium of ZM27+ZM63+S10 caused the maximum increase in not only growth and biological properties but also caused maximum biofortification of mineral nutrients in maize grains. The grain yield and 1000-grain weight were also found significantly higher 17 and 12%, respectively, under consortium application as compared to control. So, it can be concluded from these significant results obtained from the PGPR consortium application that microbial inoculants play a significant role in enhancing the growth, yield, and quality of the maize. However, the extensive evaluation of the consortium may help in the formulation of a biofertilizer for sustainable production and biofortification of maize to cope with nutritional security.

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“…PGPB inoculation is as a strategy of ecological and sustainable which increases plant growth and yield, however, it decreases the dependence of plants on N-fertilizer [ 26 , 27 ]. Some research has illustrated that plant growth and N-metabolism in inoculated Zea mays L. and Sorghum bicolo r L. were higher than in non-inoculated plants [ 28 ]. A study suggested that the increase in nitrogen concentration in Solanum lycopersicum L. was due to Bacillus pumilus inoculation [ 29 ].…”

Section: Plant Beneficial Microorganismsmentioning

confidence: 99%