Prospecting cyanobacterial formulations as plant-growth-promoting agents for maize hybrids

Prasanna, Radha; Hossain, Firoz; Babu, Santosh; Bidyarani, Ngangom; Adak, Anurup; Verma, Shikha; Shivay, Yashbir Singh; Nain, Lata

doi:10.1080/02571862.2015.1025444

Cited by 33 publications

(17 citation statements)

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“…The results obtained for N concentration in leaves, even in control crops (without N application), did not seem to be related only to biological N 2 fixation, but also to growth promotion mechanisms that can increase the plant's capacity to take up N from the soil (Dobbelaere et al, 2001). This happens because crops that have been inoculated with A. brasilense have greater CO 2 fixation, improving the ability of some mutant strains to increase BNF and positively influence the C metabolism of C4 plants, which is closely related to the N assimilation metabolism in the plant.…”

Section: Inoculation With a Brasilense Influenced Leaf Fe And Zn Conmentioning

confidence: 96%

“…The increase in root development caused by inoculation with Azospirillum is involved with several other effects. Increases in water and mineral uptake have been reported, as well as greater tolerance to stresses such as salinity and drought, resulting in a more vigorous and productive plant (Dobbelaere et al, 2001;Bashan et al, 2004). An improvement in leaf photosynthetic parameters, including chlorophyll content and stomata conductance, greater proline content in shoots and roots, improvement in water potential, an increase in water content in the apoplast, more elasticity of the cell wall, more biomass production, and greater plant size were reported by Barassi et al (2008).…”

Section: Introductionmentioning

confidence: 99%

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Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Galindo

Filho

Buzetti

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The biological nitrogen fixation (BNF) process in grasses is caused by diazotrophic bacteria, particularly Azospirillum brasilense. However, studies are lacking on BNF efficiency to define how much mineral nitrogen (N) can be applied to achieve more sustainable high yields. Furthermore, there should be an analysis of whether urea with the urease enzyme inhibitor NBPT is less harmful, benefiting BNF in grasses. The objective of this study was to evaluate the effect of N sources and N rates associated with inoculation with Azospirillum brasilense regarding foliar diagnosis and leaf chlorophyll index (LCI), agronomic efficiency (AE), and corn grain yield in the Cerrado (Brazilian tropical savanna) region. The experiment was conducted in a no-tillage system in a Latossolo Vermelho Distroférrico (Oxisol). A randomized block experimental design was used with four replications in a 2 × 5 × 2 factorial arrangement as follows: two N sources -urea and Super N, urea with urease enzyme inhibitor NBPT [N -(n-butyl thiophosphoric triamide)]; five N rates (0, 50, 100, 150, and 200 kg ha -1 ) applied in topdressing; and two seed inoculation treatments, one with and one without A. brasilense. N rate positively influenced the LCI and concentrations of N, S, and Mn in leaves, and may increase the concentrations of P, Cu, and Fe; however, higher N rates can reduce AE. The N sources had similar effects, and therefore urea is recommended for N fertilization. Inoculation with A. brasilense decreased leaf concentration of Fe and increased LCI, leaf concentration of P, AE, and corn grain yield; the use of this diazotrophic bacterium is therefore viable even when high rates of N are applied.

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Section: Inoculation With a Brasilense Influenced Leaf Fe And Zn Conmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Galindo

Filho

Buzetti

et al. 2016

Rev. Bras. Ciênc. Solo

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“…To isolate and identify native plant-growth-promoting cyanobacterial strains in wheat and rice crops [4,[32][33][34][35][36]. To determine the effectiveness of cyanobacteria colonization, their physical, metabolic and enzymatic effects, as well as their impact as biofertilizers in stressed soils, corn, and rice crops [17,[37][38][39][40].…”

Section: Action Mechanisms Of Cyanobacteria With Pgpr or Pgpmentioning

confidence: 99%

“…e cyanobacteria is considered important in carbon, nitrogen, and oxygen cycles, since they are responsible for the production of 30% of the oxygen on the planet every year [45]. ese microorganisms can also produce biocontrol agents, useful for the treatment of phytopathogenic microorganisms [37].…”

Section: Effects Of Cyanobacteria Used As Pgpr Microorganismsmentioning

confidence: 99%

“…At present, the use of cyanobacteria as biofertilizers continues to be widely studied mainly in rice and wheat crops [17,20,25,36]. However, the authors like Osman et al [29], Prasanna et al [37,39], Shariatmadari et al [19], and Swarnalakshmi et al [19] also report in their studies the positive impact of cyanobacteria on pea, corn, bean, sugar beet, pumpkin, cucumber, potato, and tomato crops, pointing at the growing expansion of the use of biofertilizers based on cyanobacteria to improve yields of all kinds of crops.…”

Section: Types Of Crops Where Cyanobacteria Biofertilizers Havementioning

confidence: 99%

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Action Mechanisms of Plant Growth Promoting Cyanobacteria in Crops In Situ: A Systematic Review of Literature

Porras

García-Londoño

Ríos-Osório

2020

International Journal of Agronomy

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Background and Aims. An excessive and prolonged use of fertilizers undermines soils’ quality and, consequently, that of the crops they support, thus reducing the content of organic matter and generating environmental damages and problems to human health. Therefore, the use of biofertilizers such as cyanobacteria becomes a promising alternative. However, it is not always possible to generalize these fertilizers’ applicability, because microorganisms may be impacted by the physical and chemical variations of their environment. We will describe the action mechanisms or the characteristics of cyanobacteria involved in plant growth promotion for different crops in situ through a systematic review of scientific literature. Methods. A comprehensive search for original articles in two different databases, ScienceDirect and Scopus, was performed. We included in our search documents published from 2009 to 2018. After the screening process and the addition of gray literature publications, we obtained 23 articles for theoretical analysis. Results. The studies were distributed mainly in Asia and part of Africa, without any important temporal variation. They also showed a tendency to describe the use of cyanobacteria genera such as Anabaena sp., Nostoc sp., and Calothrix sp., besides mechanisms as N2 fixation, phosphate solubilization, phytohormone production, bioactive compounds excretion, and symbiotic associations, mainly on rice, wheat and corn crops. Conclusions. Cyanobacteria fertilizers used in situ are a widespread strategy, mainly in cereal crops. Their use is predominant in countries where cereal crops make an important contribution to their national economy. The great variety of mechanisms and characteristics of cyanobacteria used to promote plant growth in the field demonstrate the dramatic influence that physical, chemical, and biological variables have in their development.

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Trichoderma–Azotobacter biofilm inoculation improves soil nutrient availability and plant growth in wheat and cotton

et al. 2019

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Microbial biofilms are gaining importance in agriculture, due to their multifaceted agronomic benefits and resilience to environmental fluctuations. This study focuses on comparing the influence of single inoculation—Azotobacter chroococcum (Az) or Trichoderma viride (Tv) and their biofilm (Tv–Az), on soil and plant metabolic activities in wheat and cotton grown under Phytotron conditions. Tv–Az proved superior to all the other treatments in terms of better colonisation, plant growth attributes and 10–40% enhanced availability of macronutrients and micronutrients in the soil, over control. Confocal and scanning electron microscopy showed that the cells attached to the root tips initially, followed by their proliferation along the surface of the roots. Soil polysaccharides, proteins and dehydrogenase activity showed several fold enhancement in Tv–Az biofilm inoculated samples. Time course studies revealed that the population of Az and Tv in the rhizoplane and rhizosphere was significantly higher with a 0.14–0.31 log colony‐forming unit (CFU) increase in the biofilm‐inoculated treatment in both crops. Enhancement in soil biological activities was facilitated by the improved colonisation of the biofilm, due to the synergistic association between Tv and Az. This demonstrates the utility of Tv–Az biofilm as a multifunctional plant growth promoting and soil fertility enhancing option in agriculture.

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Prospecting cyanobacterial formulations as plant-growth-promoting agents for maize hybrids

Cited by 33 publications

References 50 publications

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Action Mechanisms of Plant Growth Promoting Cyanobacteria in Crops In Situ: A Systematic Review of Literature

Trichoderma–Azotobacter biofilm inoculation improves soil nutrient availability and plant growth in wheat and cotton

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