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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
16/08/1995 |
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Data da última atualização: |
14/10/2013 |
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Autoria: |
SASSI-AYDI, S.; AYDI, S.; ABDELLY, C. |
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Afiliação: |
SAMEH SASSI-AYDI; SAMIR AYDI; CHEDLY ABDELLY. |
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Título: |
Inoculation with the native Rhizobium gallicum 8a3 improves osmotic stress tolerance in common bean drought-sensitive cultivar. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Acta Agriculturae Scandinavica - Section B, Soil and Plant Science, v. 62, p. 179-187, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Symbiotic nitrogen fixation potential in common bean is considered to be low in comparison with other grain legumes. However, it may be possible to improve the nitrogen fixation potential of common bean using efficient rhizobia. In order to improve osmotic stress tolerance of a drought-sensitive common bean cultivar (COCOT) consumed in Tunisia, plants were inoculated either by the reference strain Rhizobium tropici CIAT 899 or by inoculation with rhizobia isolated from native soils Rhizobium gallicum 8a3. Fifteen days after sowing, osmotic stress was applied by means of 25 mM mannitol (low stress level) or by 75 mM mannitol (high stress level). Fifteen days after treatment plants were harvested and different physiological and biochemical parameters were analysed. Results showed no significant differences between the studied symbioses under control conditions. However after exposure to osmotic stress our results showed better tolerance of COCOT to osmotic stress when inoculated with the native R. gallicum 8a3. This can be partially explained by better water-use efficiency in both leaves and nodules, better relative water content in nodules and better efficiency in utilization of rhizobial symbiosis as compared with COCOT-CIAT 899 symbiosis. Hence, the present study suggested the better use of native soil isolated strains for the inoculation of common bean in order to improve its performance and nitrogen fixation potential under stressful conditions. |
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Palavras-Chave: |
Bean; Estresse osmótico. |
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Thesagro: |
Feijão; Fixação de Nitrogênio. |
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Thesaurus Nal: |
Rhizobium gallicum. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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Marc: |
LEADER 02148naa a2200205 a 4500
001 1146782
005 2013-10-14
008 2012 bl uuuu u00u1 u #d
100 1 $aSASSI-AYDI, S.
245 $aInoculation with the native Rhizobium gallicum 8a3 improves osmotic stress tolerance in common bean drought-sensitive cultivar.$h[electronic resource]
260 $c2012
520 $aSymbiotic nitrogen fixation potential in common bean is considered to be low in comparison with other grain legumes. However, it may be possible to improve the nitrogen fixation potential of common bean using efficient rhizobia. In order to improve osmotic stress tolerance of a drought-sensitive common bean cultivar (COCOT) consumed in Tunisia, plants were inoculated either by the reference strain Rhizobium tropici CIAT 899 or by inoculation with rhizobia isolated from native soils Rhizobium gallicum 8a3. Fifteen days after sowing, osmotic stress was applied by means of 25 mM mannitol (low stress level) or by 75 mM mannitol (high stress level). Fifteen days after treatment plants were harvested and different physiological and biochemical parameters were analysed. Results showed no significant differences between the studied symbioses under control conditions. However after exposure to osmotic stress our results showed better tolerance of COCOT to osmotic stress when inoculated with the native R. gallicum 8a3. This can be partially explained by better water-use efficiency in both leaves and nodules, better relative water content in nodules and better efficiency in utilization of rhizobial symbiosis as compared with COCOT-CIAT 899 symbiosis. Hence, the present study suggested the better use of native soil isolated strains for the inoculation of common bean in order to improve its performance and nitrogen fixation potential under stressful conditions.
650 $aRhizobium gallicum
650 $aFeijão
650 $aFixação de Nitrogênio
653 $aBean
653 $aEstresse osmótico
700 1 $aAYDI, S.
700 1 $aABDELLY, C.
773 $tActa Agriculturae Scandinavica - Section B, Soil and Plant Science$gv. 62, p. 179-187, 2012.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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