Data/hora: 01/06/2024 05:01:04

Provedor de dados: | 58
País: | Brazil
Título: | Bacterial exopolysaccharide and biofilm formation stimulate chickpea growth and soil aggregation under salt stress
Autores: | Qurashi,Aisha Waheed; Sabri,Anjum Nasim.
Data: | 2012-09-01
Ano: | 2012
Palavras-chave: | Biofilm; Cicer arietinum; Exopolysaccharide; Salinity; Soil aggregates.
Resumo: | To compensate for stress imposed by salinity, biofilm formation and exopolysaccharide production are significant strategies of salt tolerant bacteria to assist metabolism. We hypothesized that two previously isolated salt-tolerant strains Halomonas variabilis (HT1) and Planococcus rifietoensis (RT4) have an ability to improve plant growth, These strains can form biofilm and accumulate exopolysacharides at increasing salt stress. These results showed that bacteria might be involved in developing microbial communities under salt stress and helpful in colonizing of bacterial strains to plant roots and soil particles. Eventually, it can add to the plant growth and soil structure. We investigated the comparative effect of exopolysacharide and biofilm formation in two bacterial strains Halomonas variabilis (HT1) and Planococcus rifietoensis (RT4) in response to varying salt stress. We found that biofilm formation and exopolysaccharide accumulation increased at higher salinity. To check the effect of bacterial inoculation on the plant (Cicer arietinum Var. CM-98) growth and soil aggregation, pot experiment was conducted by growing seedlings under salt stress. Inoculation of both strains increased plant growth at elevated salt stress. Weight of soil aggregates attached with roots and present in soil were added at higher salt concentrations compared to untreated controls. Soil aggregation was higher at plant roots under salinity. These results suggest the feasibility of using above strains in improving plant growth and soil fertility under salinity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000300046
Editor: | Sociedade Brasileira de Microbiologia
Relação: | 10.1590/S1517-83822012000300046
Formato: | text/html
Fonte: | Brazilian Journal of Microbiology  v.43 n.3 2012
Fonte: | info:eu-repo/semantics/openAccess