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.
Article
in English
| 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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Index:
LILACS (Americas)
Main subject:
Soil
/
Symbiosis
/
Proline
/
Sodium Chloride
/
Fungi
/
Poaceae
Type of study:
Controlled clinical trial
Language:
English
Journal:
Rev. argent. microbiol
Journal subject:
Microbiology
Year:
2002
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
EMBRAPA/BR
/
Empresa Pernambucana de Pesquisa Agropecuária-IPA/BR
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