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Titolo:
COOPERATIVE ACTION OF LIPO-CHITIN NODULATION SIGNALS ON THE INDUCTIONOF THE EARLY NODULIN, ENOD2, IN SOYBEAN ROOTS
Autore:
MINAMI E; KOUCHI H; CARLSON RW; COHN JR; KOLLI VK; DAY RB; OGAWA T; STACEY G;
Indirizzi:
UNIV TENNESSEE,DEPT MICROBIOL,CTR LEGUME RES,M409 WALTERS LIFE SCI BLDG KNOXVILLE TN 37996 UNIV TENNESSEE,DEPT MICROBIOL,CTR LEGUME RES KNOXVILLE TN 37996 NATL INST AGROBIOL RESOURCES,DEPT CELL BIOL TSUKUBA IBARAKI 305 JAPAN NATL INST AGROBIOL RESOURCES,DEPT APPL PHYSIOL TSUKUBA IBARAKI 305 JAPAN UNIV GEORGIA,COMPLEX CARBOHYDRATE RES CTR ATHENS GA 30602 INST PHYS & CHEM RES WAKO SAITAMA 35101 JAPAN
Titolo Testata:
Molecular plant-microbe interactions
fascicolo: 7, volume: 9, anno: 1996,
pagine: 574 - 583
SICI:
0894-0282(1996)9:7<574:CAOLNS>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRADYRHIZOBIUM-JAPONICUM; RHIZOBIUM-MELILOTI; HOST-SPECIFICITY; NOD FACTORS; STRUCTURAL REQUIREMENTS; GENE-EXPRESSION; PLANT; ALFALFA; CELL; OLIGOSACCHARIDES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
E. Minami et al., "COOPERATIVE ACTION OF LIPO-CHITIN NODULATION SIGNALS ON THE INDUCTIONOF THE EARLY NODULIN, ENOD2, IN SOYBEAN ROOTS", Molecular plant-microbe interactions, 9(7), 1996, pp. 574-583

Abstract

Various lipo-chitin molecules were tested for their ability to inducethe expression of the early nodulin, ENOD2, in Glycine soja roots. When inoculated separately onto G. soja roots, LCO-V (C18:1 Delta 11,Mefuc), LCO-V (C18:1 Delta 9,Mefuc), LCO-V (C16:0,Mefuc), and LCO-IV (C16:0) were unable to induce ENOD2 expression, even though these compounds had previously been shown to induce root hair curling, the formationof nodule-like primordia, and induction of the early nodulin, ENOD40. ENOD2 expression, however, was induced when any two of these molecules were inoculated in combination. Thus, the lipo-chitin nodulation signals appear to act cooperatively to induce ENOD2 expression, B. japonicum strains USDA110 and USDA135 and B. elkanii strain USDA61, all symbionts of soybean, were found to produce at least two distinct nod signals ([i.e., NodBj-V[C18:1,Mefuc] and NodBj-V[C16:0,Mefuc]). These two compounds were mixed in various ratios and tested for their ability toinduce ENOD2 expression, The results indicate that the former compound must be present in equivalent or excess amount in order to obtain maximum ENOD2 expression, Additional nonspecific LCOs (e.g., LCO-IV[C16:2 Delta 2,9; SO3]), incapable of inducing root hair curling or cortical fell division, were tested in combination with the four active LCOs listed above, It was found that any combination of one active LCO witha nonspecific LCO was sufficient to induce ENOD2 mRNA expression. TheENOD2 mRNA. expression pattern detected by in situ hybridization closely resembled that found in bacterial-induced nodules with expression detected in cortical cells between primary and secondary meristems andaround the vascular strands. These data demonstrate that the cooperative action of at least two LCO nodulation signals leads to a greater progression of nodule ontogeny as demonstrated by the expression of ENOD2, a marker gene for the differentiation of nodule parenchyma.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 12:52:40