Salt stress response and proline accumulation in Brachiaria humidicola plants with and without mycorrhizal inoculation
Rev. argent. microbiol
;
34(2): 77-82, abr.-jun. 2002.
Artigo
em Inglês
| LILACS
| ID: lil-331801
RESUMO
The work was carried out to investigate the effects of different concentrations of NaCl on Brachiaria humidicola Rendle in the presence and absence of Glomus etunicatum Becker and Gerdemann, as well as to evaluate some growth parameters and the accumulation of free proline in the plant leaves. The soil used was a Neosoil Fluvic Eutrophic with pH of 6.5, organic matter, 12.8 g kg-1 and soil texture, sandy loam, in which Brachiaria humidicola Rendle cv. 409 was grown. Five NaCl concentrations were tested 0; 0.22; 1.09; 1.96 and 2.84 g. kg-1 of soil, whose electrical conductivity (EC) were 2.22; 4.00; 8.13; 12.53 and 16.50 dS m-1, respectively. Brachiaria humidicola showed salt tolerance when submitted to an EC of 4 dS m-1. There was a reduction of leaf area, dry matter of shoots and roots for the soil treatments beyond EC at 8 dS m-1. Free proline content in the leaves increased together with the increase in soil salinity (EC at 8 dS m-1) demonstrating that plants submitted to EC of 2 and 4 dS m-1 were less affected by salt stress, and consequently accumulated less proline in the leaves. Root colonization was not affected by the increase of NaCl dosage in the soil.
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Índice:
LILACS (Américas)
Assunto principal:
Solo
/
Simbiose
/
Prolina
/
Cloreto de Sódio
/
Fungos
/
Poaceae
Tipo de estudo:
Ensaio Clínico Controlado
Idioma:
Inglês
Revista:
Rev. argent. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2002
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
EMBRAPA/BR
/
Empresa Pernambucana de Pesquisa Agropecuária-IPA/BR
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