Salt stress response and proline accumulation in Brachiaria humidicola plants with and without mycorrhizal inoculation
Rev. argent. microbiol
; Rev. argent. microbiol;34(2): 77-82, abr.-jun. 2002.
Article
en En
| BINACIS
| ID: bin-6775
Biblioteca responsable:
BR1.1
ABSTRACT
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.(AU)
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Colección:
06-national
/
AR
Base de datos:
BINACIS
Asunto principal:
Suelo
/
Simbiosis
/
Prolina
/
Cloruro de Sodio
/
Hongos
/
Poaceae
Tipo de estudio:
Clinical_trials
Idioma:
En
Revista:
Rev. argent. microbiol
Año:
2002
Tipo del documento:
Article
País de afiliación:
Brasil