Photosynthetic apparatus protection and drought effect mitigation in açaí palm seedlings by rhizobacteria

Castro, Gledson Luiz Salgado de; Júnior, Dalton Dias da Silva; Viana, Rafael Gomes; Rêgo, Marcela Cristiane Ferreira; Silva, Gisele Barata da

doi:10.1007/s11738-019-2952-4

Cited by 10 publications

(13 citation statements)

References 49 publications

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“…This bacterium, therefore, showed greater efficiency in producing phytohormones and enzymes, beneficial for seedling development (Mazzuchelli et al, 2014) that promoted both growth and quality of açaí seedlings. Castro et al (2019;2020) also observed positive effect of B. subtilis in promoting growth of açaí seedlings.…”

Section: Resultsmentioning

confidence: 86%

Rhizobacteria in growth and quality of açaí seedlings

Campos,

Patrício,

Vieira

et al. 2023

Ornam. Hortic.

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The success of any plant development relies on healthy and vigorous seedlings, and the use of rhizobacteria is a sustainable alternative for the production of high-quality seedlings as they positively interfere in plant development. Thus, the objective of this study was to evaluate the effect of rhizobacteria on growth and quality of seedlings of açaí (Euterpe oleracea Mart.), a native palm of Brazil, which has significant ornamental value in addition to the ecological and economic role, mainly by providing sweet heart of palm and fruit pulp. The experimental design was entirely randomized. There were five treatments (Bacillus subtilis, Bacillus megaterium, Bacillus amyloliquefaciens and Azospirillum brasilense plus the absence of microorganisms - control); four replicates and ten plants per plot. The following characteristics were evaluated: shoot height (cm), root length (cm); stem diameter (mm); number of leaves; leaf area (cm2); shoot, and root as well as total dry matter (g). Shoot/root ratio was determined and Dickson Quality Index. The data were submitted to variance analysis and the means were compared using Tukey’s test at 5% probability. Pearson’s correlation matrix was also determined. The rhizobacterium Bacillus subtilis provided higher growth while Bacillus amyloliquefaciens provided lower growth and quality of açaí seedlings.

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Section: Resultsmentioning

confidence: 86%

Rhizobacteria in growth and quality of açaí seedlings

Campos,

Patrício,

Vieira

et al. 2023

Ornam. Hortic.

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“…The present study revealed the physiological and biochemical mechanisms altered by the inoculation of Bacillus amyloliquefaciens (UFRAB01) in oil palm seedlings subjected to water deficit. In seedlings of other palm trees, such as the açaí palm submitted to water deficit (CASTRO et al 2019), the inoculation of Bacillus sp. alleviated negative effects on photosynthetic performance up to 50% field capacity.…”

Section: Discussionmentioning

confidence: 99%

“…A strategy with potential to induce tolerance to water stress may be the use of plant growth promoting rhizobacteria (RPCP), as they stimulate root growth to improve the efficiency of water and nutrient absorption, as observed in açaí seedlings inoculated with RPCP (CASTRO et al 2019). Other studies (FORNI et al 2016, GAGNÉ-BOURQUE et al 2016) report that plants inoculated with BPCPP are more tolerant to water deficit because they manage to mitigate the effects of oxidative stress caused by ROS through the activation of antioxidant enzymes, such as catalase ( CAT) and ascorbate peroxidase (APX).…”

Section: Introductionmentioning

confidence: 99%

Physiological and Biochemical Responses Induced by Rhizobacteria in Oil Palm Seedlings Submitted to Water Deficit

Brito¹,

Silva²,

Ribeiro³

et al. 2023

ASCS

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The oil palm (Elaeis guineensis Jacq.) is an important oilseed crop for the whole world. However, water deficiency can directly affect the development of seedlings in nurseries. The use of plant growth-promoting rhizobacteria is a potential strategy to induce drought tolerance and reduce plant mortality in the field. The objective of the study was to evaluate the ability to maintain photosynthetic performance and relieve oxidative stress in oil palm seedlings inoculated with rhizobacteria and subjected to water deficit. The experiment was carried out in a greenhouse in a completely randomized design. The treatments consisted of 8 seedlings inoculated with Bacillus amyloliquefaciens (UFRAB01) and 8 noninoculated seedlings (control) of oil palm evaluated at two times: before and after the imposition of water deficit. The inoculation increased height and diameter of the stem in relation to the control in irrigated seedlings and in water deficit. Leaf water potential was affected only by water deficit with an increase in modulus of 180%. Inoculation managed to maintain higher mean values of net photosynthesis and carboxylation efficiency compared to non-inoculated seedlings. In the condition of water deficit, the levels of MDA and activity of the CAT enzyme, however the activity of the APX enzyme increased in the inoculated seedlings. Therefore, the water deficit drastically reduced the photosynthetic performance of all oil palm seedlings, and the inoculation of UFRAB01 mitigated the damage to the photosynthetic apparatus to maintain the highest averages of net photosynthesis in relation to the noninoculated seedlings. Under field conditions, UFRAB01 inoculation can induce greater tolerance to moderate drought and decrease seedling mortality.

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“…A inoculação das raízes com rizóbios também foi benéfica para atenuar os efeitos da escassez de água nas mudas de açaí. Em arroz, a inoculação de rizóbios foi mais efetiva nas raízes do que nas sementes (Castro et al, 2019).…”

Section: Inoculação Na Raizunclassified

Biofábricas no cenário atual agrícola brasileiro: revisão

Soares¹,

Filho

Ventura³

2023

Braz. J. of Sci.

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As biofábricas têm aplicações em diversos setores da economia, incluindo em diversos modelos energéticos, na agricultura e indústria. O setor de saúde está acompanhando uma nova classe de medicamentos, os chamados biofármacos. A biofábrica é um modelo que precisa usar a biotecnologia para produzir mudas em larga escala, e seu processo precisa ser definido, podendo ser cultivadas milhares de mudas todos os anos. Objetivou-se com este trabalho, explorar o panorama das biofábricas no cenário atual agrícola brasileiro. Foi realizado uma revisão de literatura com base na literatura científica, desenvolvida a partir de materiais já elaborados, constituídos principalmente de livros, revistas, artigos científicos, monografias e teses, mediante a busca dos conhecimentos disponíveis e o direcionamento de métodos, técnicas e outros procedimentos científicos. Biorreatores são equipamentos utilizados na multiplicação de transferência de vegetais que tenham potencial segurança, economia e higiene e multiplicação de microrganismos responsáveis pela promoção do desenvolvimento vegetal. São usados para o cultivo de gemas, embriões e órgãos em meio de cultura líquido e potencializam o cultivo de mudas de forma automatizada em larga escala, com monitorização e controle das condições de cultivo, além de menor manipulação das culturas, além de microrganismos, com finalidade de utilização como inoculantes para incremento de produtividade em comodities nacionais. Conclui-se assim que as biofábricas são organismos que podem produzir compostos de interesse com grande potencial, como os microrganismos, que foram lentamente conseguindo o seu espaço no setor agrícola. É importante evidenciar que as biofábricas tem menores valores necessários para produzir a preservação dos recursos naturais, a redução dos impactos negativos da agricultura, o reaproveitamento de resíduos orgânicos gerados por processos agrícolas locais, e fortalecimento da economia local e comunitária. Além disso, a versatilidade da biologia sintética permite que os cientistas melhorem os produtos das biofábricas, potencializando o material genético ou gerando o acréscimo de produtividade nas culturas agrícolas brasileiras.

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Photosynthetic apparatus protection and drought effect mitigation in açaí palm seedlings by rhizobacteria

Cited by 10 publications

References 49 publications

Rhizobacteria in growth and quality of açaí seedlings

Rhizobacteria in growth and quality of açaí seedlings

Physiological and Biochemical Responses Induced by Rhizobacteria in Oil Palm Seedlings Submitted to Water Deficit

Biofábricas no cenário atual agrícola brasileiro: revisão

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