Data/hora: 05/06/2024 12:29:59

Provedor de dados: | 58
País: | Brazil
Título: | Rhizobacterial promotion of eucalypt rooting and growth
Autores: | Teixeira,Débora A.; Alfenas,Acelino Couto; Mafia,Reginaldo Gonçalves; Ferreira,Eraclides M.; Siqueira,Leandro de; Maffia,Luiz A.; Mounteer,Ann H.
Data: | 2007-03-01
Ano: | 2007
Palavras-chave: | Eucalyptus; Cloning; Mini-cutting; Cutting; Rhizobacteria.
Resumo: | A total of 107 rhizobacterial isolates, obtained from the rhizosphere of eucalypt clones were tested as rooting inducers of cuttings and mini-cuttings planted in substrate composed of carbonized rice husk and vermiculite (1:1). Cuttings and mini-cuttings were planted in conical plastic tubes containing treated and untreated (control) substrate and kept under intermittent mist irrigation at 26-28ºC. After 35 days, rooting percentage and dry root matter of cuttings were evaluated. Ten isolates capable of providing gains of up to 110% in root formation and up to 250% in root biomass over non-inoculated control cuttings were selected. Gains in rooting varied according to clone and isolate tested. The greatest gains were obtained for the mini-cuttings exhibiting the lowest rooting efficiency. Among the ten isolates tested, only 3918 (code R98) and MF4 (code R87), produced 3-indole-acetic acid in vitro, at concentrations of 0.7 and 0.67 µg ml-1, respectively. Significant increases in rooting and root dry matter of cuttings grown on rhizobacteria-inoculated substrate were found when compared to untreated or indole-butyric acid (IBA) treated mini-cuttings.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100025
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822007000100025
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.38 n.1 2007
Fonte: | info:eu-repo/semantics/openAccess