scholarly journals Promotion of rice growth and productivity as a result of seed inoculation with Azospirillum brasilense

2020 ◽  
Vol 16 (6) ◽  
pp. 765-776
Author(s):  
Francisco Guimarães Vandeir ◽  
Klein Jeferson ◽  
Barbosa Ferreira Marcos ◽  
Kestring Klein Débora
Keyword(s):  
Azospirillum Brasilense ◽  
Rice Growth ◽  
Seed Inoculation

scholarly journals Synergistic effects of seed inoculation with Azospirillum brasilense and nitrogen sources on double cropped maize production in tropical savanna of Brazil

2016 ◽  
Vol 10 (07) ◽  
pp. 1061-1068 ◽  
Author(s):  
Flávio Hiroshi Kaneko ◽  
◽  
Michelle Traete Sabundjian ◽  
João Paulo Ferreira ◽  
Douglas de Castilho Gitti ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Synergistic Effects ◽  
Nitrogen Sources ◽  
Tropical Savanna ◽  
Maize Production ◽  
Seed Inoculation

scholarly journals The effect of flax seed inoculation by Azospirillum brasilense on flax yield and its quality

2011 ◽  
Vol 52 (No. 9) ◽  
pp. 402-406 ◽  
Author(s):  
N. Mikhailouskaya
Keyword(s):  
Azospirillum Brasilense ◽  
Soil Management ◽  
Flax Seed ◽  
Negative Effects ◽  
Seed Inoculation ◽  
Growth Promoting ◽  
Biological Management ◽  
High Concentrations ◽  
N Requirement ◽  
Ecology And Economy

Field experiment demonstrated the benefit resulting from biological soil management including the use of N<sub>2</sub>-fixing and growth promoting bacteria A. brasilense B-4485 for long-fibred flax. Seed inoculation by A. brasilense B-4485 was equivalent to the introduction of 15 kg/ha of N that provided the possibility of partial flax N requirement supply. Treatment A. brasilense + N<sub>15</sub>P<sub>60</sub>K<sub>90</sub> is considered to be the most profitable management in regard to flax yield and its quality, and is comparable to N<sub>30</sub>P<sub>60</sub>K<sub>90</sub> treatment. Biological management allows preventing high concentrations of N in soil, excludes lodging and negative effects on flax yield and its quality. Implementation of biological management for flax nutrition may be profitable for both ecology and economy of long-fibered flax growing.

scholarly journals Magnesium Sources and Inoculation with Azospirillum brasilense in the Initial Development of Maize

2019 ◽  
Vol 11 (7) ◽  
pp. 170
Author(s):  
Roberto Cecatto Júnior ◽  
Vandeir Francisco Guimarães ◽  
Lucas Guilherme Bulegon ◽  
Anderson Daniel Suss ◽  
Adriano Mitio Inigaki ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Dry Mass ◽  
Stem Diameter ◽  
Mineral Fertilization ◽  
Initial Development ◽  
Maize Seeds ◽  
Seed Inoculation ◽  
Leaf Dry Mass ◽  
Maize Plants ◽  
And Control

The aim was to evaluate the initial development of maize plants when submitted to mineral fertilization with magnesium sources in the presence or absence of seed inoculation with Azospirillum brasilense. To do so, was conducted an experiment in greenhouse. In the essay was adopted a randomized blocks design, in a factorial scheme 3 &times; 2, represented by the magnesium sources: magnesium sulfate (MgSO4), magnesium oxide (MgO) and control without Mg fertilization, in the presence or absence of inoculation with A. brasilense. The Mg sources were supplied with a dose of 30 kg ha-1, being homogenized in the substrate before sowing the crop. The analysis were carried out in the V4 stage, evaluating: basal stem diameter (BSD); relative chlorophyll content (SPAD index), leaf dry mass (LDM), stem + sheath blade dry mass (SSDM) and root dry mass (RDM). No differences were observed for the factors interaction and for the Mg sources. When considered the seed inoculation there was increases of 7.1%; 6.61%; 19.23%; 28.32%; and 15.17 %, for basal stem diameter, SPAD index, leaf dry mass, stem + sheath blade dry mass and roots, respectively. The inoculation of maize seeds with A. brasilense increases the initial development of maize plants and the SPAD index in greenhouse conditions in the V4, while the fertilization with the magnesium sources do not interfere in the maize development.

scholarly journals Wheat cultivars submitted to seed inoculation with Azospirillum brasilense and nitrogen application in different environments

Científica ◽  
2018 ◽  
Vol 46 (1) ◽  
pp. 95 ◽  
Author(s):  
Neuri Antônio Feldmann ◽  
Christian Bredemeier ◽  
Leandro Hahn ◽  
Fabiana Raquel Mühl
Keyword(s):  
Azospirillum Brasilense ◽  
Wheat Cultivars ◽  
Nitrogen Application ◽  
Seed Inoculation

scholarly journals Efficiency and response of corn cultivars to nitrogen, associated or not with Azospirillum brasilense

2021 ◽  
Vol 8 (4) ◽  
pp. 217-224
Author(s):  
Vanderlan Carneiro Dias ◽  
Joênes Mucci Peluzio ◽  
Flávio Sérgio Afférri ◽  
Maria Dilma de Lima ◽  
Domingos Bonfim Ribeiro dos Santos ◽  
...  
Keyword(s):  
Experimental Design ◽  
Azospirillum Brasilense ◽  
Variance Analysis ◽  
Nitrogen Fixing ◽  
Nitrogen Fixing Bacteria ◽  
Nitrogen Use ◽  
Maize Cultivars ◽  
Seed Inoculation

Green corn is an economic and social alternative for small and medium-sized farmers. However, the high cost of the insums, especially in relation to the use of nitrogen, has advanced studies with nitrogen-fixing bacteria. This study evaluated commercial maize cultivars for the production of green ears, responsive and efficient to nitrogen use, with and without application in Azospirillum brasilense seeds. Two trials were installed in the agricultural years 2019/20 and 2020/21 in soweds carried out on 12/04/2019 and 10/12/2020 in this order, at the Federal University of Tocantins, Palmas-TO. In each trial, the experimental design was randomized blocks, with three replications, being the treatments arranged in subdivided plots, where the treatments involving the processes with inoculation of seeds with the bacterium Azospirillum (C Az) and without inoculation of seeds (S Az) were allocated in the plots, two doses of nitrogen (30 and 120 kg ha-1 N, considered as low and high N, respectively) and in the subplots eight corn cultivars were allocated in the subplots. Joint variance analysis was performed for each of the seed inoculation processes (C Az and S Az) and then the efficiency and response of corn cultivars were studied for the use of N for each process. The inoculation of seeds with the bacterium promoted changes in the efficiency and response of cultivars regarding the use of nitrogen. The cultivar BRS-3046 was the most important for the cultivation of green ears, since it was efficient and responsive to the use of nitrogen with Azospirillum brasilense.

scholarly journals Morphometry and production of maize inoculated with Azospirillum brasilense

2021 ◽  
Vol 17 (4) ◽  
pp. 34-46
Author(s):  
Tauane Santos Brito ◽  
Vandeir Francisco Guimarães ◽  
Elisiane Inês Dall’Oglio Chaves ◽  
Renan Pan ◽  
Alexandre Wegner Lerner ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Dry Mass ◽  
Stem Diameter ◽  
Root Volume ◽  
Inoculation Methods ◽  
Nutritional Parameters ◽  
Seed Inoculation ◽  
Maize Plants ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

This study aimed to analyze the influence of inoculation methods with Azospirillum brasilense in morphometric and nutritional parameters of the maize crop. Maize plants, hybrid Formula VT®, were grown under different forms of inoculation: absence of inoculation; seed inoculation; leaf inoculation; seed inoculation associated to leaf inoculation. In the phenological stages V8 and VT the parameters number of leaves, aerial height, root volume, stem diameter, besides the leaves, stem, sheath, root and total dry mass and the leaf content of nitrogen, phosphorus and potassium were determined. In the R6 stage, in addition to the previous evaluations the following parameters were determined: ear diameter and length, number of kernel rows, number of kernels per row, the reproductive structure and thousand grains dry mass, and total number of grains, besides the grain’s content of nitrogen, phosphorus, and potassium. The SPAD index from the leave’s apex, medial and basal thirds was measured fortnightly. The inoculation methods with A. brasilense had little influence in maize’s morphometric and nutritional parameters, also not influencing in production. Maize plants inoculated with A. brasilense, via seed and via seed associated to leaf spraying, positively stood out for the stem diameter, leaves dry mas, root volume, and for the nitrogen, phosphorus, and potassium leaf content.

scholarly journals Efeito da Inoculação de Azospirillum Brasilense em Plantas de Trigo Submetidas a Convivência com Azevém

2019 ◽  
Vol 23 (2) ◽  
pp. 115
Author(s):  
Jaqueline de Araújo Barbosa ◽  
Ivonei Perego ◽  
Claudia Tochetto ◽  
Neumarcio Vilanova da Costa
Keyword(s):  
Azospirillum Brasilense ◽  
Lolium Multiflorum ◽  
Block Design ◽  
Dry Mass ◽  
Wheat Crop ◽  
Weed Competition ◽  
Seed Inoculation ◽  
Randomized Block Design ◽  
Wheat Cultivation ◽  
Number Of Leaves

A matocompetição limita o crescimento e o desenvolvimento da cultura do trigo. Porém, a inoculação com bactérias diazotróficas pode reduzir os efeitos da matocompetição. Este trabalho teve como objetivo avaliar a inoculação de Azospirillum brasilense em sementes de trigo, e seus efeitos nos estádios iniciais de desenvolvimento, sendo submetidas em convivência com plantas de azevém. Utilizou-se delineamento experimental em blocos casualizados, e esquema fatorial 2x3, com quatro repetições. O primeiro fator correspondeu a inoculação de sementes trigo com A. brasilense, e o segundo fator a três densidades populacionais de azevém (0, 25, 50). Avaliações foram realizadas nas plantas de trigo aos 18 e 34 dias após a emergência (DAE). Aos 18 DAE, na densidade de 50 plantas de azevém, as plantas de trigo inoculadas foram 30% maiores em altura. Houve redução no número de folhas, em que as plantas de trigo inoculadas apresentaram número de folhas 33% maior do que as não inoculadas, além de índice de SPAD 23% maior. Aos 34 DAE, na densidade de 50 plantas de azevém, houve aumento de 21% na altura das plantas de trigo, índice SPAD 13% maior, e área foliar 15% maior em relação às plantas não inoculadas. Apesar do aumento de 68% no acúmulo de massa seca, as plantas inoculadas não diferiram em biomassa em relação à testemunha, quando em matocompetição. Conclui-se que a inoculação com A. brasilense favorece a cultura do trigo em matocompetição até os 18 DAE, mas ao final de 34 DAE, não se observam efeitos satisfatórios. Palavras-chave: Diazotróficas. Lolium multiflorum. Matocompetição. Plantas Daninhas. AbstractThe weed competition limits the growth and development of the wheat crop. However, the inoculation with diazotrophic bacteria can reduce the effects of weed competition. The objective of this work was to evaluate the inoculation with Azospirillum brasilense in seeds, and its effects in the early stages of development, and subjected to  coexistence with plants of azevém.  A completely randomized block design, and factorial 2x3, with four replications were used. The first factor corresponded to wheat seed inoculation with A. brasilense, and the second factor to three population densities of azevém (0, 25, 50). Evaluations were performed in wheat plants at 18 and 34 days after emergence (DAE). At 18 DAE, the density of 50 plants of azevém, the wheat plants inoculated were 30% greater in height. There was a reduction in the number of leaves, in which the wheat plants inoculated presented a number of sheets 33% higher than those not inoculated, in addition to SPAD index 23% higher. At 34 DAE, the density of 50 plants of azevém, there was an increase of 21% in the height of wheat plants, SPAD index 13% higher leaf area, and 15% higher than the non-inoculated plants. Despite the increase of 68% in the accumulation of dry mass, the inoculated plants did not differ in biomass in relation to the control , when in weed competition.  It is concluded that inoculation with A. brasilense favors wheat cultivation in weed competition up to 18 DAE, but at the end of 34 DAE, no satisfactory effects are observed. Keywords: Diazotrophic. Lolium multiflorum. Matocompetition. Weeds.  

scholarly journals Enhancement of Vegetative Parameters of Brinjal in Proplates by the Application of Bacterial Endophytes - Azospirillum brasilense and Pseudomonas fluorescens

2014 ◽  
Vol 27 ◽  
pp. 14-18
Author(s):  
U. Sivagamasundari ◽  
A. Gandhi
Keyword(s):  
Pseudomonas Fluorescens ◽  
Azospirillum Brasilense ◽  
Species Level ◽  
Bacterial Endophytes ◽  
Biochemical Tests ◽  
Iaa Production ◽  
Seed Inoculation ◽  
Pigment Contents ◽  
Vegetative Characters ◽  
Level Identification

An experiment was carried out with endophytic fixing bacteria Azospirillum brasilense and Pseudomonas fluorescens isolated from brinjal, in different combinations with inorganic fertilizers by seed inoculation of brinjal to observe preliminary vegetative growth at 15th and 30th day and pigment contents in vegetable nursery bed (proplates). A total number of 28 endophytic bacteria isolated from brinjal from three localities (Annamalai University, Karaikal and Putthur). Further the isolates were subjected to various biochemical tests for their species level identification and nitrogen fixing ability was estimated. Based upon their N-fixing ability and IAA production, two strains, one Azospirillum sp. and one Pseudomonas sp. isolate was selected and tested for its performance in brinjal. The seeds treated with 75% Chemical fertilizer + Azospirillum brasilense + Pseudomonas fluorescens (T6) showed maximum plant vegetative characters, followed by others compared with control.

scholarly journals Mitigation of drought stress effects on soybean gas exchanges induced by Azospirillum brasilense and plant regulators

2019 ◽  
Vol 49 ◽  
Author(s):  
Lucas Guilherme Bulegon ◽  
Vandeir Francisco Guimarães ◽  
Andre Gustavo Battistus ◽  
Adriano Mitio Inagaki ◽  
Neumárcio Vilanova da Costa
Keyword(s):  
Drought Stress ◽  
Water Content ◽  
Relative Water Content ◽  
Azospirillum Brasilense ◽  
Foliar Spray ◽  
Lower Yield ◽  
Gas Exchanges ◽  
Stress Control ◽  
Seed Inoculation ◽  
Relative Water

ABSTRACT Drought stress is a limitation for the agricultural production, having as a primary effect the reduction of plant gas exchanges, and the continuity of its incidence results in a lower yield. This study aimed to evaluate the photosynthetic responses and the soybean yield, concerning the seed inoculation and foliar spray with Azospirillum brasilense and plant regulator containing auxin, gibberellin and cytokinin. A randomized complete block design was used under greenhouse conditions, with five treatments: four under drought stress (control, seed inoculation and foliar spray with A. brasilense and plant regulator) and one irrigated treatment. The soil gravimetric moisture, relative water content, CO2 net assimilation rate, apparent quantum efficiency, light compensation point and grain yield were evaluated. The water deficiency reduced the relative water content by 76.96 % and the soybean gas exchanges by 860.43 %, in the drought stress control. However, when using A. brasilense or plant regulator, the reduction of these values was mitigated, with maximum reductions of 52.40 % in the relative water content and 361.99 % in the gas exchanges. Thus, the mitigation of these effects was directly correlated with the grains yielded by plants, where the use of foliar spray with A. brasilense or plant regulator presented averages 19 % higher than the drought stress control. The applications of foliar spray with A. brasilense and plant regulator mitigate the effects of drought stress on the soybean photosynthesis and culminate in lower yield losses.

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