Exploitation of new endophytic bacteria and their ability to promote sugarcane growth and nitrogen nutrition

Autor(es)

Dias da Silveira, Adriana Parada ^[1] ; Freitas Iorio, Raquel de Paula ^[1] ; Correia Marcos, Fernanda Castro ^[1] ; Fernandes, Ana Olivia ^[1] ; Creste Dias de Souza, Silvana Aparecida ^[2] ; Kuramae, Eiko Eurya ^[3] ; Pereira Cipriano, Matheus Aparecido ^[1]

Afiliação do(s) autor(es)

^[1] Agron Inst IAC, Ctr Soil & Environm Resources, POB 28, BR-13010970 Campinas, SP - Brazil

^[2] Agron Inst IAC, Ctr Sugarcane, BR-14001970 Ribeirao Preto, SP - Brazil

^[3] Netherlands Inst Ecol NIOO KNAW, Dept Microbial Ecol, Wageningen - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY; v. 112, n. 2, p. 283-295, FEB 2019.
• Citações Web of Science: 2

Resumo

Few studies have evaluated endophytic bacteria in relation to plant growth promotion, nitrogen uptake and biological control. The aim of this study was to molecularly and physiologically characterize thirteen endophytic bacteria strains, evaluate their biological control properties and their ability to promote plant growth and plant N nutrition. All the strains produced indole acetic acid and promoted increase of plant biomass, N accumulative amount and N-use efficiency index. None of the strains carries the nifH gene. Four strains stimulated plant nitrate reductase activity, four solubilized phosphate, nine produced siderophores and none produced HCN. Seven strains inhibited Bipolaris sacchari growth and one was antagonistic to Ceratocystis paradoxa. The pathogens were inhibited by the production of diffusible and volatile metabolites by the bacterial strains. Moreover, this is the first study to demonstrate the effect of Delftia acidovorans on sugarcane plant growth, nitrogen metabolism improvement and antagonism to B. sacchari. The most efficient strains in promoting plant growth and exhibiting antagonistic activities towards fungal pathogens were Herbaspirillum frinsingense (IAC-BECa-152) and three Pantoea dispersa strains (IAC-BECa-128, IAC-BECa-129, and IAC-BECa-132). These bacteria show potential to be used as inoculants for sustainable agricultural management, mainly at the seedling production phase. (AU)

• Processo FAPESP: 08/56147-1 - Nutrição nitrogenada de cana-de-açúcar com fertilizantes ou bactérias diazotróficas
• Beneficiário: Heitor Cantarella
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático