Effects of inoculation with Azospirillum brasilense on photosynthetic enzyme activities and grain yield in maize

Stancheva, Ira; Димитров, Иван; Kaloyanova, N.; Dimitrova, A.; Angelov, M.

doi:10.1051/agro:19920405

Cited by 14 publications

(8 citation statements)

References 8 publications

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“…Essa justificativa é consistente com o reportado por Stancheva et al (1992), que afirmam que o aumento da taxa de acúmulo de matéria seca em plantas de milho inoculadas com A. brasilense ocorre, principalmente, na presença de elevadas doses de N, o que parece estar relacionado com o aumento da atividade das enzimas fotossintéticas e de assimilação desse nutriente. Possivelmente, a maior taxa de absorção está relacionada a modificações na morfologia do sistema radicular, as quais podem estar relacionadas à produção de fitormônios pela bactéria, conforme abordado em outros estudos (Dobbelaere et al, 2001;Roesch et al, 2007).…”

Section: Resultsunclassified

Aspectos morfofisiológicos de plantas de milho e bioquímico do solo em resposta à adubação nitrogenada e à inoculação com Azospirillum brasilense

et al. 2015

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Aspectos morfofisiológicos de plantas de milho e bioquímico do solo em resposta à adubação nitrogenada e à inoculação com Azospirillum brasilense O nitrogênio (N) é um macronutriente que aumenta a produção de grãos na cultura do milho e o seu manejo adequado torna-se indispensável como proposta de uma agricultura sustentável, incluindo o uso de fontes alternativas como bactérias fixadoras de N 2 . Os objetivos deste trabalho foram avaliar a resposta morfofisiológica de plantas de milho e a atividade de enzimas no solo (urease e fosfatase) decorrente da adubação N mineral e da inoculação com Azospirillum brasilense. Dois ensaios foram realizados em condições de casa de vegetação com solo de cerrado. O delineamento estatístico adotado foi o de blocos ao acaso com os tratamentos distribuídos em esquema fatorial 3 x 3, sendo o primeiro fator correspondente a doses de N (0; 100 e 200 kg ha -1 ) e o segundo, a doses de um inoculante líquido à base de A. brasilense aplicado via sementes (0; 100 e 200 mL ha -1 ). Ao final desse experimento, outro ensaio foi realizado para verificar o possível efeito residual da inoculação e da adubação nitrogenada. A adição de fertilizantes nitrogenados promoveu maior desenvolvimento das plantas de milho, elevou os teores de clorofila e de nutrientes. Houve aumento da atividade das enzimas relacionadas à disponibilização de amônio e fósforo inorgânico na rizosfera. Além disso, o nitrogênio apresentou efeito residual no desenvolvimento das plantas na semeadura subsequente. A dose de 200 mL ha -1 de A. brasilense associada à dose de 200 kg ha -1 de N aumentou a resposta fisiológica da cultura. Palavras-chave:Zea mays L., bactéria diazotrófica, doses de nitrogênio, atividade enzimática.

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Section: Resultsunclassified

Aspectos morfofisiológicos de plantas de milho e bioquímico do solo em resposta à adubação nitrogenada e à inoculação com Azospirillum brasilense

et al. 2015

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“…It has been suggested that an increase in the accumulation rate of dry matter in maize plants inoculated with A. brasilense occurs mainly in the presence of high doses of N (STANCHEVA et al, 1992). This result appears to be related to an increase in the activity of photosynthetic enzymes and in the assimilation of the nutrient, thereby contributing to the development of the shoots and the root system of the plant.…”

Section: Inoculation Of Maize With Azospirillum Brasilense In the Seementioning

confidence: 99%

Inoculation of maize withAzospirillum brasilensein the seed furrow

Morais

Brito

Brandão

et al. 2016

Revista Ciência Agronômica

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-Several studies addressing the inoculation of cereals with diazotrophic microorganisms can be found in the literature. However, in many experiments, investigators have overlooked the feasibility of applying these microorganisms to the furrow together with the seed, and the effect of bacterial concentration on phytostimulation. The aim of this work was to evaluate the effect of doses of an inoculant based on Azospirillum brasilense, applied to the seed furrow when planting maize, combined with different doses of nitrogen fertiliser. The experiment was carried out in the field, in soil of the cerrado region of Brazil. An experimental design of randomised blocks in bands was adopted, comprising nitrogen (40, 100, 200 and 300 kg ha -1 ) and doses of an A. brasilense-based liquid inoculant applied to the seed furrow (0, 100, 200, 300 and 400 mL ha -1 ). The dose of 200 mL ha -1 Azospirillum was noteworthy for grain production. This is the first report of the effective application of Azospirillum in the seed furrow when planting maize in the cerrado region of Brazil.

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“…Furthermore, there is an increased need to curb the use of synthetic fertilisers due to ecological concerns such as contamination of ground water (Spalding & Exner, ). The combined use of microbial and chemical fertilisers has been demonstrated as a viable approach to reduce excessive use of chemical fertilisers whilst maintaining yields (Stancheva et al ., ; Dobbelaere et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Seed treatment with selected plant growth‐promoting rhizobacteria increases maize yield in the field

Breedt

Labuschagne

Coutinho

2017

Annals of Applied Biology

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Maize, Zea mays is the most important grain crop in South Africa and is a staple food in many African countries. The beneficial effects of plant growth-promoting rhizobacteria on crop growth and yield have been well documented, but obtaining reproducible results under field conditions is often difficult. In the current study, five selected rhizobacterial strains that showed plant growth-promoting activities in pilot studies were evaluated for potential enhancement of maize yield under field conditions. The five strains together with a commercial standard were assessed as seed treatments of maize over three seasons in four different soil types. The strains were identified on the basis of 16S rRNA sequencing as Lysinibacillus sphaericus (T19), Paenibacillus alvei (T29), Bacillus safensis (S7) Bacillus pumilus (A26) and Brevundimonas vesicularis (A40). The best yield increases in maize were obtained during the 2011/2012 and 2012/2013 seasons in the Shortlands ecotope with the rhizobacterial strains T19, T29 and S7, resulting in yield increases ranging from 24% to 34%. Strain T19 rendered the most consistent yield increases during the three successive field trials amounting to 33% and 24% in Shortlands ecotope and 12% in Clovalley ecotope, respectively. During 2013/2014 a consortium of three strains, viz. T19, S7 and A26 gave a 32% yield increase in Clovalley ecotope. All the rhizobacterial strains solubilised phosphate in vitro except T19. Strain T29 showed the best nitrogen-fixing activity in vitro, proliferating on a nitrogen-free substrate and also producing ammonia. All the strains tested positive for indole acetic acid production. The current study demonstrates the ability of rhizobacterial strains T19, T29, S7 and A26 applied as seed treatments to significantly enhance maize yield in the field, making development and commercialisation of these strains a viable option.

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Effects of inoculation with Azospirillum brasilense on photosynthetic enzyme activities and grain yield in maize

Cited by 14 publications

References 8 publications

Aspectos morfofisiológicos de plantas de milho e bioquímico do solo em resposta à adubação nitrogenada e à inoculação com Azospirillum brasilense

Aspectos morfofisiológicos de plantas de milho e bioquímico do solo em resposta à adubação nitrogenada e à inoculação com Azospirillum brasilense

Inoculation of maize withAzospirillum brasilensein the seed furrow

Seed treatment with selected plant growth‐promoting rhizobacteria increases maize yield in the field

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