scholarly journals DIVERGÊNCIA GENÉTICA DE GENÓTIPOS DE MILHO CULTIVADOS SOB ADUBAÇÃO NITROGENADA E INOCULAÇÃO COM Azospirillum brasilense

2021 ◽  
Vol 12 (2) ◽  
pp. 69
Author(s):  
Luiz Eduardo Tilhaqui Bertasello ◽  
Anderson Prates Coelho ◽  
Gustavo Vitti Môro
Keyword(s):  
Azospirillum Brasilense

Objetivou-se avaliar e caracterizar o desempenho agronômico de genótipos de milho submetidos a dois fornecimentos de nitrogênio (químico e biológico). O experimento foi conduzido na em segunda safra 2017 e primeira safra 2017/2018, utilizando-se 48 genótipos de milho. Foram adotados dois manejos de fornecimento de nitrogênio em cobertura, sendo eles (1) aplicação de 140 kg ha-1 de nitrogênio mineral em cobertura e (2) inoculação com Azospirillum brasilense (600 mL ha-1 via solo). Os dados foram submetidos a análises exploratórias multivariadas de agrupamento, por método hierárquico, e de componentes principais. Foram identificados quatro grupos, associando as maiores produtividades de grãos com plantas com maior altura e as menores produtividades com período de florescimento curto, plantas com menor altura a com maiores taxas de quebramento e acamamento. Os dois primeiros componentes principais explicaram 70,67% e 66,54% da variabilidade total dos dados para a inoculação com A. brasilense e adubação nitrogenada em cobertura, respectivamente. As análises exploratórias de dados são ferramentas eficientes na caracterização, seleção e agrupamento de genótipos superiores e contrastantes de milho aos manejos de fornecimento de nitrogênio.

Снижение эффективности формирования биопленок и их устойчивости к окислительному стрессу и высушиванию у ahpC мутанта Azospirillum Brasilense

2021 ◽  
Vol 90 (1) ◽  
pp. 64-75
Author(s):  
А. В. Шелудько ◽  
Д. И. Мокеев ◽  
С. С. Евстигнеева ◽  
Ю. А. Филипьечева ◽  
А. М. Буров ◽  
...  
Keyword(s):  
Azospirillum Brasilense

scholarly journals SOYBEAN CULTIVATION IN A CROP-LIVESTOCK SYSTEM WITH Azospirillum brasilense INOCULATION

2018 ◽  
Vol 31 (1) ◽  
pp. 1-8
Author(s):  
MARCOS DA SILVA BRUM ◽  
THOMAS NEWTON MARTIN ◽  
VINÍCIUS SANTOS DA CUNHA ◽  
LUIZ FERNANDO TELEKEN GRANDO ◽  
ALEX TAGLIAPIETRA SCHONELL
Keyword(s):  
Azospirillum Brasilense ◽  
Block Design ◽  
Experimental Period ◽  
Height Control ◽  
Grain Productivity ◽  
Randomized Complete Block Design ◽  
Grazing Systems ◽  
Soybean Plants ◽  
Santa Maria ◽  
Livestock System

ABSTRACT The objective of this study was to evaluate the phytomorphological parameters of soybean in a crop-livestock system inoculated with Azospirillum brasilense. The experiment was conducted in Santa Maria, Brazil, for two agricultural years (2 Paper extracted from the doctoral thesis of the first author. 012/2013 and 2013/2014) in a randomized complete block design with three replications. In the winter, the black oat and ryegrass pasture was managed with sheep under different grazing systems: (I) - a conventional grazing (CG) system, where the animals remained in the pasture throughout the experimental period without any pasture height control; (II, III, and IV) - systems with post-grazing pasture heights of 10, 20, and 30 cm, respectively; and (NG) - one control without grazing. All treatments received two nitrogen doses (50 and 100 kg ha-1) and inoculation or no inoculation (A. brasilense). The soybean cultivar BMX Potência RR was sown using no-tillage on 16 November 2012 and 1 December 2013. In each plot, seven rows of plants with spacing of 0.45 m were used, and in four rows, the seeds were inoculated with the bacterium A. brasilense. The phytomorphological variables and grain productivity were evaluated. In a croplivestock system, soybean has better productivity when established on black oat and ryegrass pasture managed with post-grazing pasture heights of between 20 and 30 cm. Areas under conventional grazing in the winter led to smaller soybean plants with lower first and last pod heights. Inoculation with A. brasilense should not be used alone in soybean cultivation.

scholarly journals Expression and function of the cdgD gene, encoding a CHASE–PAS-DGC-EAL domain protein, in Azospirillum brasilense

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
José Francisco Cruz-Pérez ◽  
Roxana Lara-Oueilhe ◽  
Cynthia Marcos-Jiménez ◽  
Ricardo Cuatlayotl-Olarte ◽  
María Luisa Xiqui-Vázquez ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Type Strain ◽  
Wild Type Strain ◽  
Soil Conditions ◽  
Wild Type ◽  
Gene Encoding ◽  
Wheat Roots ◽  
Genes Encoding ◽  
In The Wild ◽  
Plant Growth Promoting

AbstractThe plant growth-promoting bacterium Azospirillum brasilense contains several genes encoding proteins involved in the biosynthesis and degradation of the second messenger cyclic-di-GMP, which may control key bacterial functions, such as biofilm formation and motility. Here, we analysed the function and expression of the cdgD gene, encoding a multidomain protein that includes GGDEF-EAL domains and CHASE and PAS domains. An insertional cdgD gene mutant was constructed, and analysis of biofilm and extracellular polymeric substance production, as well as the motility phenotype indicated that cdgD encoded a functional diguanylate protein. These results were correlated with a reduced overall cellular concentration of cyclic-di-GMP in the mutant over 48 h compared with that observed in the wild-type strain, which was recovered in the complemented strain. In addition, cdgD gene expression was measured in cells growing under planktonic or biofilm conditions, and differential expression was observed when KNO3 or NH4Cl was added to the minimal medium as a nitrogen source. The transcriptional fusion of the cdgD promoter with the gene encoding the autofluorescent mCherry protein indicated that the cdgD gene was expressed both under abiotic conditions and in association with wheat roots. Reduced colonization of wheat roots was observed for the mutant compared with the wild-type strain grown in the same soil conditions. The Azospirillum-plant association begins with the motility of the bacterium towards the plant rhizosphere followed by the adsorption and adherence of these bacteria to plant roots. Therefore, it is important to study the genes that contribute to this initial interaction of the bacterium with its host plant.

GLUTAMATE SYNTHASE FROM AZOSPIRILLUM BRASILENSE: ROLE OF FLAVINS AND IRON SULFUR CENTERS

1991 ◽  
pp. 749-754
Author(s):  
Maria A. Vanoni ◽  
Giuliana Zanetti ◽  
Bruno Curti ◽  
Dale E. Edmondson
Keyword(s):  
Azospirillum Brasilense ◽  
Glutamate Synthase ◽  
Iron Sulfur

Zinc use efficiency of maize-wheat cropping after inoculation with Azospirillum brasilense

2021 ◽  
Author(s):  
Fernando Shintate Galindo ◽  
João Leonardo Miranda Bellotte ◽  
José Mateus Kondo Santini ◽  
Salatiér Buzetti ◽  
Poliana Aparecida Leonel Rosa ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Use Efficiency

Structural studies of the O-specific polysaccharide(s) from the lipopolysaccharide of Azospirillum brasilense type strain Sp7

2013 ◽  
Vol 380 ◽  
pp. 76-80 ◽  
Author(s):  
Elena N. Sigida ◽  
Yuliya P. Fedonenko ◽  
Alexander S. Shashkov ◽  
Evelina L. Zdorovenko ◽  
Svetlana A. Konnova ◽  
...  
Keyword(s):  
Azospirillum Brasilense ◽  
Type Strain ◽  
Structural Studies ◽  
Specific Polysaccharide
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