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Titolo:
INTERACTIONS OF RHIZOBIA WITH RICE AND WHEAT
Autore:
WEBSTER G; GOUGH C; VASSE J; BATCHELOR CA; OCALLAGHAN KJ; KOTHARI SL; DAVEY MR; DENARIE J; COCKING EC;
Indirizzi:
UNIV NOTTINGHAM,DEPT LIFE SCI,PLANT GENET MANIPULAT GRP NOTTINGHAM NG7 2RD ENGLAND UNIV NOTTINGHAM,DEPT LIFE SCI,PLANT GENET MANIPULAT GRP NOTTINGHAM NG7 2RD ENGLAND INRA,CNRS,LAB BIOL MOL RELAT PLANTES MICROORGANISMES F-31326 CASTANETTOLOSAN FRANCE
Titolo Testata:
Plant and soil
fascicolo: 1-2, volume: 194, anno: 1997,
pagine: 115 - 122
SICI:
0032-079X(1997)194:1-2<115:IORWRA>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
AZORHIZOBIUM-CAULINODANS; NITROGEN-FIXATION; SESBANIA-ROSTRATA; PARASPONIA-ANDERSONII; PHENOLIC-COMPOUNDS; STEM NODULES; NOD LOCUS-1; NODULATION; GENES; MELILOTI;
Keywords:
AZORHIZOBIUM CAULINODANS; CRACK ENTRY; INTERCELLULAR COLONIZATION; NARINGENIN; RICE; WHEAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
47
Recensione:
Indirizzi per estratti:
Citazione:
G. Webster et al., "INTERACTIONS OF RHIZOBIA WITH RICE AND WHEAT", Plant and soil, 194(1-2), 1997, pp. 115-122

Abstract

Recently, evidence has been obtained that naturally occurring rhizobia, isolated from the nodules of non-legume Parasponia species and fromsome tropical legumes, are able to enter the roots of rice, wheat andmaize at emerging lateral roots by crack entry. We have now investigated whether Azorhizobium caulinodans strain ORS571, which induces rootand stem nodules on the tropical legume Sesbania rostrata as a resultof crack entry invasion of emerging lateral roots, might also enter rice and wheat by a similar route. Following inoculation with ORS571 carrying a lacZ reporter gene, azorhizobia were observed microscopicallywithin the cracks associated with emerging lateral roots of rice and wheat. A high proportion of inoculated rice and wheat plants had colonized lateral root cracks. The flavanone naringenin at 10(-4) and 10(-5) M stimulated significantly the colonization of lateral root cracks and also intercellular colonization of wheat roots. Naringenin does notappear to be acting as a carbon source and may act as a signal molecule for intercellular colonization of rice and wheat by ORS571 by a mechanism which is nod gene-independent, unlike nodule formation in Sesbania rostrata. The opportunity now arises to compare and to contrast the ability of Azorhizobium caulinodans with that of other rhizobia, such as Parasponia rhizobia, to intercellularly colonize the roots of non-legume crops.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 20:35:05