Burkholderia sp. is a bacterial genus extremely versatile in the environment and has been reported for great potential to promote plant growth via different mechanisms. Here we evaluate growth-promoting mechanisms twenty-six strains. Strains were evaluated their ability by means of: indole-3-acetic acid (IAA) production under conditions of pH, salt stress presence or absence L-tryptophan; exopolysaccharides (EPS) quorum sensing (ALH). The strains also characterized terms genetic variability...

Tree legumes are a viable option to increase ecosystem services provided by warm‐climate grasslands. Benefits of using tree in silvopasture systems (SPS) include the provision shade for livestock, biological N 2 fixation, and C sequestration. This study assessed cattle performance pasture characteristics signalgrass ( Brachiaria decumbens Stapf.) pastures monoculture or SPS. The following treatments were assessed: (i) signalgrass/sabiá Mimosa caesalpiniifolia Benth.), (ii)...

Sugarcane is one of the crops responsible for high consumption fertilizers in Brazil. To minimize this demand a sustainable alternative to increase studies evaluate beneficial effects relationship between plants/microorganisms, mainly plant growth-promoting bacteria. The objectives study were: a) potentially diazotrophic bacteria isolates from sugarcane adverse environmental conditions; b) inoculate these their ability growth-promotion. was carried Northeast Bacterial genera Burkholderia...

Diazotrophic bacteria isolated from Brachiaria spp.: genetic and physiological diversity.Cien.Inv.Agr.45(

Protein hydrolysates originating from egg white have already been reported to be bioactive and, among their biological activities, possess the antioxidant property that protects body early ageing and diseases linked oxidation. Therefore, objective of this work was evaluate activity obtained by hydrolysis hen poultry. The protease produced Aspergillus avenaceus URM 6706 purified subsequently applied hydrolysate white, degree verified during exposure time (4-24 h). intensified over protease....

Plant growth-promoting bacteria (PGPB) have received great interest in recent decades. However, PGPB mechanisms remain poorly understood forage species. We aimed to evaluate roots endophytic and rhizospheric strains from Brachiaria humidicola decumbens. The were evaluated for biological nitrogen-fixing saline stress (0 10.0 g L-1 of NaCl), N-acyl homoserine lactones indole-like compounds (ILC) production, the activity hydrolytic enzymes, inorganic phosphate solubilization (IPS) under...

Pasture degradation can cause changes in diazotrophic bacterial communities. Thus, this study aimed to evaluate the culturable and total community, associated with regions of rhizosphere roots Brachiaria decumbens Stapf. pastures different stages degradation. Samples rhizospheric soil were collected from slightly, partially, highly degraded pastures. McCrady’s table was used obtain Most Probable Number (MPN) bacteria per gram sample, order determine population density calculate...

To choose the method of forage mass estimation (FM), consider plant species, required accuracy and available technology. In this sense, objective was to evaluate methods determination direct FM comparative visual per­formance with five 10 patterns, in trees Gliricidia (Gliricidia sepium Jacq.) Sabiá (Mimosa caesalpiniifolia Benth.) At heights up 1,5 m above soil whole (1.65 1.90 for from 3.63 5.03 Sabiá, averages 1.80 4.24 m, respectively), using as a unit sample. The evaluations were...

Resistance inducers and biochemical mechanisms in the control anthracnosis on cowpea

ABSTRACT The Caatinga is an exclusively Brazilian biome that has been under high anthropogenic action, which directly interferes in the quality of its soil. In order to evaluate and monitor soil, chemical biological indicators are used, with determination enzymatic activity gaining prominence. objective this study was soils preserved anthropized areas belonging Catimbau National Park, located Pernambuco, Brazil, during two periods year (rainy dry), for three consecutive years, 2014, 2015...

The objective of this research was to evaluate the inoculation and co-inoculation bacteria with biotechnological potential, isolated from Brachiaria decumbens Stapf. humidicola (Rendle) Schweickerdt, under germination seedling growth B. cv. Basilisk, as well as, verify influence co-inoculum in soil indigenous bacterial community. For this, two assays a completely randomized design were set up. experimental period 21 days. In chamber, 25 treatments evaluated (24 inoculants control – without...

ABSTRACT: The resistance induction becomes an alternative to control microorganisms that attacks like plants. Little is known about the dose and its effect on enzymatic activities associated with of pepper plants under anthracnose attack. objective this study was evaluate severity estimate activity Arcade F1 hybrid peppers infected Colletotrichum gloeosporioides submitted different doses abiotic acibenzolar-S-methyl inducer. experimental design completely randomized blocks five treatments,...

The objective of this study was to evaluate the efficiency enzyme β-1, 3-glucanase and mechanisms action produced by yeasts in biological control ofgreen mold post-harvest oranges pear variety. Fully Casualized Delineation(FCD) used. results were submitted analysis variance (ANOVA), triplicate,compared with Tukey's test at a 5% probability level (p < 0.05), using statisticalsoftware Sisvar. It found that killer activity observed 85.7% yeastsevaluated. yeast Candida peltata...

Microorganisms play a crucial role when closely associated with plants and can be considered new sustainable tool for protecting promoting pasture growth. The aim of this work was to prospect microbial consortium (MIX) the ability promote growth development Urochloa decumbens cv. Basilisk pastures, based on hypothesis that MIX may have similar potential chemical fertilization. To achieve objectives, seven treatments were carried out, five which MIXs (MIX 1, 2, 3, 4, 5, previously...

This study aimed to evaluate the biological quality of soil under influence different genotypes elephant grass in agreste region, which has a climate that marks transition between humid with dry season and semi-arid north-eastern hinterland. The was conducted at Experimental Farm Universidade Federal Rural de Pernambuco, Garanhuns, PE, Brazil. treatments comprised combination two cultivars (Elefante B Mott), irrigation regimes (with without irrigation), climatic periods (dry rainy)....

Pennisetum purpureum (Schumach) cultivar BRS Capiaçu stands out from other forage species for its high production capacity. In order to improve plant management in the field, it is necessary standardize germination/emergence of seeds or seedlings, as well rapid development. The use growth-promoting bacteria is, therefore, a viable and sustainable strategy, especially reduces environmental damage caused by trivial various agricultural inputs. This study aimed evaluate germination...

In the present study, buffalo milk caseinate hydrolysates produced by bromelain, neutrase, papain and trypsin were ultra-filtered different fractions assessed for antioxidant, inhibition of angiotensin converting enzyme antimicrobial activity. Biological potential was a number metrics: ability to remove radicals 2,2'-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid), 2,2'-diphenyl-1-picrylhydrazyl (DPPH) hydroxyls; copper iron chelation; antidiabetic properties; antihypertensive assay;...

Produtos de origem biótica e abiótica estão sendo investigados para utilização no manejo pragas. A busca por formas eficientes controle da cochonilha-do-carmim Dactylopius opuntiae Cockerell que infestam a palma forrageira Opuntia spp. qual é responsável pela destruição palmais em todo Nordeste considerada uma praga-chave, afeta fortemente pecuária semiárido, faz-se cada vez mais necessárias. O objetivo do presente estudo foi avaliar aplicação indutores resistência bióticos abióticos...

Introdução: a oxidação em sistemas biológicos está relacionada ao desenvolvimento de patologias humanos. A ingestão alimentos ricos compostos químicos que exercem atividade antioxidante contribui para prevenção e redução dos efeitos deletérios radicais livres formados no organismo. Peptídeos derivados das caseínas têm mostrado um elevado potencial como agentes antioxidantes. Objetivos: neste sentido, o presente estudo avaliou hidrolisados leites espécies bubalina, bovina caprina, obtidos...

Elephant grass (Pennisetum purpureum) is one of the most productive warm-season grasses. Farmers utilize elephant in different forms, such as cut-and-carry, grazing, conserved forage (silage, hay), and an energy source (Lira et al. 2010). Nitrogen (N) essential element for plant growth development usually a limiting factor production tropics (Boddey 2004). Biological N fixation (BNF) may occur grasses by their association with diazotrophic bacteria. These bacteria colonize niches host plant:...