Universidade de Lisboa Repositório da Universidade de Lisboa

Repositório da Universidade de Lisboa >
Faculdade de Ciências (FC) >
FC - Livros e Capítulos de Livros >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10451/4536

Título: In vitro induction of nitrogenase activity in free-living rhizobia by a non-nodulating legume
Autor: Martins-Loução, M. A.
Rodriguez-Barrueco, C.
Palavras-chave: Rhizobium
Fixação de nitrogénio
Crescimento vegetal
Fisiologia vegetal
Issue Date: 1987
Editora: Plenum Publishing Corporation
Citação: In Prespectives in Biotechnology. New York : Plenum Publishing Corporation, 1987. p. 123-130.
Resumo: The effect of cultured carob cell extracts and exudates on acetylene reduction of three different species of Rhizobium, namely R. japonicum IS-33, “cowpea” Rhizobium Tal 169 and R. leguminosarum Tal 619, was studied. The exudates, excreted from plant callus cultures on an agar defined medium promote a synergistic activation of nitrogenase in pure cultures of rhizobia. “ Cowpea” Rhizobium nitrogenase in pure cultures of rhizobia. “ Cowpea” Rhizobium nitrogenase activity was stimulated by a high concentration of sucrose in the medium. Ability of exudates to influence Nase of R. leguminosarum and R. japonicum, respectively, increased in the presence of succinate. Stimulation could also take place when bactéria were grown on medium to which a crude cell extract was added. When the extract was incubated with rhizobia in a minimal nutrient medium a strong synergistic activation of R. leguminosarum and R. japonicum nitrogenase was observed. On this medium the cell extract showed an inhibitory effect on “cowpea” Rhizobium nitrogenase activity.
Arbitragem científica: yes
URI: http://hdl.handle.net/10451/4536
Appears in Collections:FC - Livros e Capítulos de Livros

Files in This Item:

File Description SizeFormat
vinaflrnnl_123_130.pdf1,11 MBAdobe PDFView/Open
Restrict Access. You can request a copy!

Please give feedback about this item
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Logotipo do DeGóis 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


  © Universidade de Lisboa / SIBUL
Alameda da Universidade | Cidade Universitária | 1649-004 Lisboa | Portugal
Tel. +351 217967624 | Fax +351 217933624 | repositorio@reitoria.ul.pt - Feedback - Statistics
Promotores do RCAAP   Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência PO Sociedade do Conhecimento (POSC) Portal oficial da União Europeia