Endophytic bacteria isolated from orchid and their potential to promote plant growth

Autor(es)

Faria, Deise Cristina ^[1] ; Franco Dias, Armando Cavalcante ^[2] ; Melo, Itamar Soares ^[3] ; de Carvalho Costa, Francisco Eduardo ^[4]

Afiliação do(s) autor(es)

^[1] Univ Vale do Sapucai. UNIVAS

^[2] Univ Sao Paulo. Ctr Nucl Energy Agr

^[3] Embrapa Meio Ambiente. Lab Environm Microbiol

^[4] INATEL. Telecomunicat Natl Inst

• Tipo de documento: Artigo Científico
• Fonte: WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY; v. 29, n. 2, p. 217-221, FEB 2013.
• Citações Web of Science: 13

Resumo

Twelve endophytic bacteria were isolated from the meristem of in vitro Cymbidium eburneum orchid, and screened according to indole yield quantified by colorimetric assay, in vitro phosphate solubilization, and potential for plant growth promotion under greenhouse conditions. Eight strains with positive results were classified into the genus Paenibacillus by FAME profile, and evaluated for their ability to increase survival and promote the growth of in vitro germinated Cattleya loddigesii seedlings during the acclimatization process. The obtained results showed that all strains produced detectable indole levels and did not exhibit potential for solubilizing inorganic phosphate. Particularly, an increase of the total biomass and number of leaves was observed. Two strains of Paenibacillus macerans promoted plant growth under greenhouse conditions. None of the treatments had a deleterious effect on growth of inoculated plants. These results suggest that these bacterial effects could be potentially useful to promote plant growth during seedling acclimatization in orchid species other than the species of origin. (AU)

• Processo FAPESP: 04/13910-6 - Biodiversidade e atividades funcionais de microrganismos de manguezais do estado de São Paulo
• Beneficiário: Itamar Soares de Melo
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 08/54013-8 - Diversidade de arquéias e bactérias envolvidas na ciclagem do nitrogênio em sedimentos de manguezais
• Beneficiário: Armando Cavalcante Franco Dias
• Modalidade de apoio: Bolsas no Brasil - Doutorado