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Titolo:
NODULE-LIKE STRUCTURES INDUCED ON THE ROOTS OF RICE SEEDLINGS BY ADDITION OF THE SYNTHETIC AUXIN 2,4-DICHLOROPHENOXYACETIC ACID
Autore:
RIDGE RW; RIDE KM; ROLFE BG;
Indirizzi:
INT CHRISTIAN UNIV,DIV NAT SCI,DEPT BIOL,10-2 OSAWA 3 CHOME MITAKA TOKYO 181 JAPAN AUSTRALIAN NATL UNIV,RES SCH BIOL SCI,PLANT MICROBE INTERACT GRP CANBERRA ACT 2601 AUSTRALIA
Titolo Testata:
Australian journal of plant physiology
fascicolo: 6, volume: 20, anno: 1993,
pagine: 705 - 717
SICI:
0310-7841(1993)20:6<705:NSIOTR>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEGUME PARASPONIA-ANDERSONII; NITROGEN-FIXATION; RHIZOBIUM; NODULATION; GENES; BRADYRHIZOBIUM; INFECTION; MUTANTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
R.W. Ridge et al., "NODULE-LIKE STRUCTURES INDUCED ON THE ROOTS OF RICE SEEDLINGS BY ADDITION OF THE SYNTHETIC AUXIN 2,4-DICHLOROPHENOXYACETIC ACID", Australian journal of plant physiology, 20(6), 1993, pp. 705-717

Abstract

Nodule-like structures were induced on rice varieties Calrose and Pelde using 2,4-dichlorophenoxyacetic acid (2,4-D) in a concentration range of 2.5 x 10(-6) M to 1 x 10(-5) M. The nodule-like structures appeared to result from the fusion of multiple meristems induced in very close proximity to each other. The internal tissue differentiation of some of the nodule-like structures was found to be similar to that of both Parasponia nodules and some kinds of determinate legume nodules. These spheroid nodule-like structures, similar in external morphology todeterminate legume nodules, showed no internal infection or colonisation by Rhizobium strain NGR 234 or the Azorhizobium strain ORS 571. However, on the rice variety Calrose, the strain ORS 571 sometimes colonised extensively the surface of the nodule-like structures, in comparison to levels found on emerging lateral roots and to the root surface of the same plants. The strain NGR 234 did not colonise the surface ofthe nodule-like structures. The synthetic phytohormone 2,4-D also induced a range of other phenomena, including various levels of fusion ofprimordia and structures with a callus-like surface instead of an epidermis, but with a differentiated internal anatomy. These experiments indicate that tissue development in some types of nodule is the resultof a number of meristems fusing together at a single site, and at a very early stage in development.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 21:19:54