Aumento da eficiência nutricional de tomateiros inoculados com bactérias endofíticas promotoras de crescimento

Barretti, Patrícia Baston; Souza, Rosemeri Melo e; Pozza, Adélia Aziz Alexandre; Pozza, Edson Ampélio; Carvalho, Janice Guedes de; Souza, Jorge Teodoro de

doi:10.1590/s0100-06832008000400018

Cited by 13 publications

(7 citation statements)

References 14 publications

(16 reference statements)

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“…and Micrococcus spp. [43], but not to the extent observed in this study, in which practically all nutrients showed an increase in nutrient accumulation, especially for N, P. K, Ca, Mg, and S UEI (Figure 4), when plants were inoculated with bacteria strains. The increase in nutrient UEI reflects that inoculated seedlings were more efficient than non-inoculated plants in producing biomass per unit of nutrient taken up [44].…”

Section: Discussioncontrasting

confidence: 73%

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling

et al. 2021

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Beneficial plant–microbe interactions lead to physiological and biochemical changes that may result in plant-growth promotion. This study evaluated the effect of the interaction between sugarcane and endophytic bacterial strains on plant physiological and biochemical responses under two levels of nitrogen (N) fertilization. Six strains of endophytic bacteria, previously selected as plant growth-promoting bacteria (PGPB), were used to inoculate sugarcane mini stalks, with and without N fertilization. After 45 days, biomass production; shoot nutrient concentrations; foliar polyamine and free amino acid profiles; activities of nitrate reductase and glutamine synthase; and the relative transcript levels of the GS1, GS2, and SHR5 genes in sugarcane leaves were determined. All six endophytic strains promoted sugarcane growth, increasing shoot and root biomass, plant nutritional status, and the use efficiency of most nutrients. The inoculation-induced changes at the biochemical level altered the foliar free amino acid and polyamine profiles, mainly regarding the relative concentrations of citrulline, putrescine, glycine, alanine, glutamate, glutamine, proline, and aspartate. The transcription of GS1, GS2, and SHR5 was higher in the N fertilized seedlings, and almost not altered by endophytic bacterial strains. The endophytic strains promoted sugarcane seedlings growth mainly by improving nutrient efficiency. This improvement could not be explained by their ability to induce the production of amino acid and polyamine composts, or GS1, GS2, and SHR5, showing that complex interactions may be associated with enhancement of the sugarcane seedlings’ performance by endophytic bacteria. The strains demonstrated biotechnological potential for sugarcane seedling production.

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Section: Discussioncontrasting

confidence: 73%

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling

et al. 2021

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“…This observation may be explained by a reduction in the values of these variables that occurred at the final evaluation times, possibly related to exhaustion of the nutritional content of the available substrate, or even an absence of symbiotic microflora in the autoclaved substrate, specifically in the case of the control plants for the latter scenario. Symbionts mediate the transfer of nutrients from the soil to plants (Barretti et al, 2008;Behie and Bidochka, 2014), and the presence of endophytic fungi has been linked to mechanisms such as the mineralization of available organic matter (Van Hecke et al, 2005), alteration of the chemical and biological properties of the soil and changes in hydraulic characteristics and aggregate stability (Hosseini et al, 2015). Filamentous fungi, such as those used in this work, release enzymes through their hyphae that interact with the organic matter in the substrate (Chigineva et al, 2011) and transform nutrients, such as nitrogen, into forms that are assimilable by plants (Chen et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Growth promotion mediated by endophytic fungi in cloned seedlings of Eucalyptus grandis x Eucalyptus urophylla hybrids

Vitorino¹,

Bessa²,

Carvalho³

et al. 2016

Afr. J. Biotechnol.

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Eucalyptus cultivation has expanded considerably in Brazilian systems, leading to the current search for technologies to optimize growing conditions and the production of seedlings in nurseries. Based on the understanding that the development of tree species such as Eucalyptus sp. can be influenced by endophytic fungi that act directly as plant growth-promoting species, cloned seedlings of Eucalyptus grandis x Eucalyptus urophylla hybrids grown from minicuttings we stimulated with three species of endophytic fungi and the effects of inoculation on seedling growth was evaluated. Strains of Trichoderma sp., Fusarium sp. and Papulaspora sp. were forced to colonize the root system of the plants, which were continuously maintained under protected cultivation. Inoculation of the symbionts had positive effects on stem length, stem diameter and the fresh and dry biomass of the treated plants. Non-inoculated plants presented a shorter stem length than the plants treated with any of the endophytic species. The cloned seedlings inoculated with Trichoderma sp. exhibited the greatest stem measurements at 120 days after transplanting. The seedlings inoculated with Fusarium sp. displayed a greater number of leaves than the other seedlings as well as greater amounts of fresh and dry biomass. The authors also conducted quarterly evaluations of the increment in seedling growth promoted by the inoculants, which were more effective in the early stages, up to 60 days after transplanting.

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“…É importante ressaltar que, quanto maior a produção de massa pelas raízes das plantas, menor a concentração dos nutrientes, por isso podem ocorrer menores teores de nutrientes em raízes com maior massa seca, em comparação com aquelas de menor produção de massa (BARRETTI et al, 2008).…”

Section: Discussionunclassified

“…A presença do Cr aumenta a necessidade de controle no uso desse resíduo no solo, uma vez que o Cr é potencialmente nocivo aos seres vivos em razão, principalmente, do elevado poder oxidante da forma catiônica hexavalente (Cr +6 ), que, juntamente com a forma trivalente (Cr +3 ), compõe os estados de oxidação predominante do metal no solo (BARTLETT, 1991). Além do estado de oxidação, fatores como o teor de argila, de óxidos e hidróxidos, de matéria orgânica, o pH, o potencial redox e o teor do próprio metal influenciam sua dinâmica de adsorção/dessorção e precipitação/dissolução no solo (ALLEONI et al, 2005), podendo ser, em qualquer dos seus estados de oxidação, absorvido e ocorrer em teor elevado nos tecidos da planta SINHA, 2007).…”

Section: Introductionunclassified

Atributos químicos de um cambissolo e crescimento de mudas de eucalipto após adição de lodo de curtume contendo cromo

et al. 2014

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RESUMO -O processo de curtimento do couro gera resíduos com potencial de uso como corretivo e fertilizante, no entanto alguns de seus constituintes são tóxicos quando presentes em elevado teor no solo, o que limita sua utilização nos sistemas de produção. O objetivo deste trabalho foi avaliar as alterações nos atributos químicos de um Cambissolo Húmico e o crescimento e teor de Cr em clones de Eucalyptus urophylla após a adição de doses de lodo de curtume (LCT). O experimento foi realizado em casa de vegetação, no período de março a julho de 2009. Os tratamentos consistiram da adição de doses de lodo de curtume (0; 1,5; 3,0; 4,5; e 6,0 g dm -3) ao solo, que recebeu, de forma complementar, calcário e adubação NPK em dose única. O pH, a condutividade elétrica, a relação de adsorção de sódio e a porcentagem de sódio trocável, relacionadas com a salinidade do solo, aumentaram com o incremento das doses do lodo de curtume, porém os valores observados ficaram abaixo dos níveis salinos. O teor de Cr solúvel no solo, extraído pela água, decresceu linearmente com o aumento das doses de LCT, correlacionando-se negativamente com o pH do solo. O aumento da dose do LCT proporcionou incremento na altura dos clones de Eucalyptus urophylla em até 11,5% em relação à testemunha. A produção de massa das raízes secas decresceu, em média, 28,3%, em relação à testemunha, com a maior dose (6 g dm -3 ). As plantas de eucalipto, em todos os tratamentos, continham o Cr somente no sistema radicular, e, quanto maior a dose de LCT, maior o teor desse metal nas raízes.Palavras-chave: Resíduo industrial; RAS; PST. CHEMICAL ATTRIBUTES OF A CAMBISOL AND GROWTH OF EUCALYPTUS SEEDLING AFTER THE ADDITION OF TANNERY SLUDGE CONTAINING CHROMIUM

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Aumento da eficiência nutricional de tomateiros inoculados com bactérias endofíticas promotoras de crescimento

Cited by 13 publications

References 14 publications

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling

Growth promotion mediated by endophytic fungi in cloned seedlings of Eucalyptus grandis x Eucalyptus urophylla hybrids

Atributos químicos de um cambissolo e crescimento de mudas de eucalipto após adição de lodo de curtume contendo cromo

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