Azospirillum brasilense affects the antioxidant activity and leaf pigment content of Urochloa ruziziensis under water stress

Bulegon, Lucas Guilherme; Guimarães, Vandeir Francisco; Laureth, Jessica Cristina Urbanski

doi:10.1590/1983-40632016v4641489

Cited by 32 publications

(19 citation statements)

References 23 publications

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“…The inoculation of dual-purpose wheat (pasture and grain production) plants with A. brasilense provided an increase in the production of tillers and leaf blades [23]. Under drought conditions, the effects of A. brasilense have been observed on physiological variables such as turgor maintenance or protection against oxidative stress [24,25]. The inoculation; single or combined had no effect on SPAD index of Wheat plants when cropped without water restrictions ( Table 2).…”

Section: Resultsmentioning

confidence: 99%

Inoculation of Wheat Plants with Pseudomonas spp. and Azospirillum brasilense under Drought Stress

Fioreze

Pinheiro

Pereira

et al. 2020

JEAI

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Aims:To investigate the effect of inoculation and co-inoculation of Pseudomonas spp. and Azospirillum brasilense on the morphophysiological characters of wheat (Triticum aestivum L.) under drought stress conditions. Study Design: A randomized complete block design was used in a split plot scheme with four replicates. The plots consisted of irrigated and drought conditions. The subplots consisted of control (without inoculation), inoculation of Pseudomonas spp., inoculation of A. brasilense and coinoculation of Pseudomonas spp. + A. brasilense. Liquid inoculant was used for two bacteria. Place and Duration of Study: Agricultural Experimental Area of the Federal University of Santa Catarina, Campus of Curitibanos, SC, Brazil, between July and October 2018. Methodology: Inoculation was performed at the time of sowing. Water deficit was characterized by irrigation suppression after plant emergence, considering a 25-day period without significant rainfall. Fioreze et al.; JEAI, 42(2): 1-7, 2020; Article no.JEAI.53070 2 At the end of the water restriction period, SPAD (Soil Plant Analysis Development) index and morphologic parameters of wheat plants was determined. Results: Drought stress decreased dry matter accumulation of wheat plants, in terms of number of tillers, above ground dry matter and root-shoot ratio. Inoculation or co-inoculation with Pseudomonas spp. and A. brasilense did not affect plant growth. Under drought stress, SPAD index was higher in plants co-inoculated with Pseudomonas spp. and A. brasilense. Conclusion: Although maintains SPAD index of wheat plants under drought stress, inoculation and co-inoculation with Pseudomonas spp. and A. brasilense do not influence the morphological characters of wheat plants. Original Research Article

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Section: Resultsmentioning

confidence: 99%

Inoculation of Wheat Plants with Pseudomonas spp. and Azospirillum brasilense under Drought Stress

Fioreze

Pinheiro

Pereira

et al. 2020

JEAI

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“…Being the character of grain production very influenced by environmental factors, the use of inoculation has its importance enlarged. While collaborating for mitigation of hydric stress (Bulegon et al, 2016), also contributes to avoid stress by salty soils (Nia et al, 2012) and higher nutrients absorption area (Morais et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Thus, seeking an increase in the crop yield it is considered the seed inoculation with growth promoting bacteria (GPB), among them stands out the Azospirillum brasilense (Novakowiski et al, 2011;Dartora et al, 2013;Costa et al, 2015) which have many beneficial effects, for example, stimulus to plants development from the provision of vegetal hormones such as auxins, gibberellins and cytokinin (Kuss et al, 2007), providing in many cases more vigorous and productive plants (Cassán & Diaz-zorita, 2016), promoting higher nutrients absorption such as nitrogen, potassium and phosphorus (Hungria et al, 2010), besides reducing adverse effects caused by environmental conditions such as hydric deficit, by stimulus in the antioxidative vegetal system (Bulegon et al, 2016) and the crops gas exchanges (Bulegon et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Inoculation of Maize Seeds With Azospirillum and Magnesium Through Foliar Application to Enhance Productive Performance

Júnior¹,

Guimarães²,

Bulegon³

et al. 2019

JAS

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The present study aimed to evaluate the productive performance of maize crop when seed inoculated with A. brasilense, associated with different foliar doses of magnesium in the crop vegetative stages. For this, two essays were conducted in field conditions, one located in Laranjeiras do Sul-PR and the other in Entre Rios do Oeste-PR. A randomized blocks scheme was used, with a 3 × 2 factorial, being the treatments with magnesium (Mg): magnesium sulphate; magnesium oxide and without magnesium, and the presence or absence of seed inoculation with A. brasilense. The magnesium sources were supplied via foliar at the V 4 stage of the crop, using doses of 6 kg ha -1 . Evaluations were carried at R 1 determining the SPAD index and stem diameter and, at the end of the productive cycle, were evaluated production components and yield. In both sites no significant effects of foliar application with Mg were observed over the evaluated parameters. The A. brasilense inoculation provided an increase of 9.66% and 6.32% in stem diameter and of 6.8% and 6.24% in the SPAD index in Laranjeiras do Sul and Entre Rios do Oeste respectively, however, they did not increase production components and yield. It is concluded that the inoculation with A. brasilense increases of stem diameter values and SPAD index, in turn the foliar fertilization with different sources of magnesium do not interfere in the development and productivity of corn crop.

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“…Em relação aos pigmentos fotossintéticos, era esperado que o uso de A. brasilense auxiliasse na manutenção dos teores de clorofila, visto que a inoculação com A. brasilense estimula a síntese de novas moléculas de clorofila, conforme demostrado em trigo (Bashan et al, 2006). Em estudos com estresse vegetal, a imposição de déficit hídrico em Urochloa ruziziensis, associado à inoculação via pulverização foliar de A. brasilense evidenciou a ação destas bactérias promotoras de crescimento vegetal na manutenção dos teores de clorofila nas plantas estressadas (Bulegon et al, 2016). Os autores relacionaram este resultado aos maiores teores de carotenoides presentes nas folhas, que provavelmente protegeram as clorofilas da degradação (Abdelgawad et al, 2015).…”

Section: Resultsunclassified

Fitotoxidez de mesotriona em milho inoculado com Azospirillum brasilense associado a adubação nitrogenada

Bulegon

Inagaki

Moratelli

et al. 2017

Agraria

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RESUMOEste estudo objetivou avaliar a fitotoxidez do herbicida mesotriona no desenvolvimento inicial do milho inoculado com Azospirillum brasilense, associado à adubação nitrogenada. O delineamento utilizado foi o de blocos casualizados, em esquema fatorial 2x3, representado por milho com e sem aplicação do mesotriona (192 g ha) e os tratamentos: 1-inoculação das sementes com A. brasilense; 2-aplicação em cobertura de 140 kg ha -1 de N; e 3-A. brasilense + 140 kg ha -1 de N em cobertura aplicado aos 26 dias após a semeadura (DAS). A aplicação do mesotriona foi realizada aos 21 DAS, com avaliações realizadas por 28 dias após a aplicação (DAA). Aos 7 DAA constatou-se redução da taxa de assimilação líquida de CO 2 em 35% nas plantas que receberam aplicação de mesotriona, bem como aumento da atividade da peroxidase e maior degradação de carotenoides. Aos 14 DAA de mesotriona resultou em redução na taxa de assimilação líquida de CO 2 e na transpiração, enquanto aos 28 DAA foi verificado menor altura de plantas, área foliar e massa seca de parte aérea nas plantas com herbicida. A inoculação com A. brasilense + N elevou a atividade das peroxidases aos 7 DAA e auxiliou a manutenção da taxa transpiratória aos 14 DAA. Conclui-se que a inoculação com A. brasilense + N pode minimizar os efeitos danosos causados pelo mesotriona no desenvolvimento inicial do milho.Palavras-chave: bactérias promotoras de crescimento vegetal; herbicida; inibidor dos carotenoides; trocas gasosas Phytotoxicity of mesotriona in corn with Azospirillum brasilense associated nitrogen fertilization ABSTRACTThis study aimed to evaluate the phytotoxicity of the mesotrione herbicide in the initial development of maize inoculated with Azospirillum brasilense and associated with nitrogen fertilization. The treatments were: randomized blocks in a 2x3 factorial scheme, represented by maize with and without mesotrione application (192 g ha -1 ) and treatments: 1-inoculation of the seeds with A. brasilense; 2-Application in coverage of 140 kg ha -1 of N; And 3-A. brasilense + 140 kg ha-1 of N in cover applied at 26 days after sowing (DAS). The application of mesotrione was performed at 21 DAS, with evaluations performed up to 28 days after application (DAA). At 7 DAA a reduction of the net assimilation rate of CO 2 in 35% in the plants with mesotrione was observed, as well as increase of the peroxidases activity and greater degradation of carotenoids in the mesotrione plants. At 14 DAA the mesotrione reduced the rate of CO 2 net assimilation and transpiration, while at 28 DAA, lower plant height, leaf area and shoot dry mass were verified in herbicide plants. The inoculation with A. brasilense + N increased peroxidase activity at 7 DAA and helped maintain the transpiratory rate at 14 DAA. It is concluded that inoculation with A. brasilense + N can minimize the harmful effects caused by mesotrione in the initial development of corn.

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Azospirillum brasilense affects the antioxidant activity and leaf pigment content of Urochloa ruziziensis under water stress

Cited by 32 publications

References 23 publications

Inoculation of Wheat Plants with Pseudomonas spp. and Azospirillum brasilense under Drought Stress

Inoculation of Wheat Plants with Pseudomonas spp. and Azospirillum brasilense under Drought Stress

Inoculation of Maize Seeds With Azospirillum and Magnesium Through Foliar Application to Enhance Productive Performance

Fitotoxidez de mesotriona em milho inoculado com Azospirillum brasilense associado a adubação nitrogenada

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