http://www.cnr.it/ontology/cnr/individuo/prodotto/ID236979
Auxin and growth regulation of rice coleoptile segments - molecular analysis (Articolo in rivista)
- Type
- Label
- Auxin and growth regulation of rice coleoptile segments - molecular analysis (Articolo in rivista) (literal)
- Anno
- 1992-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1104/pp.98.2.488 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Diego Breviario, Silvia Gianì, Paolo Di Vietri and Immacolata Coraggio (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto Biosintesi Vegetali, Consiglio Nazionale delle Ricerche,Milano,Italy (literal)
- Titolo
- Auxin and growth regulation of rice coleoptile segments - molecular analysis (literal)
- Abstract
- Auxin-stimulated elongation of apical segments of rice (Oryza
sativa L. cv Arborio) coleoptiles occurring in the first 4 hours of
treatment has been studied. Cell extension promoted in the first
2 hours by 10 micromolar indole-3-acetic acid (IAA) is specifically
auxin-dependent, whereas after 4 hours, elongation also depends
on endogenous production of ethylene. Similar to other systems,
rice coleoptile cell elongation stimulated by auxin requires continuous
synthesis of RNA and protein. Two-dimensional gel analysis
of the in vitro translation products obtained from polyadenylated
RNAs extracted from treated and untreated segments after
1 or 4 hours from the initial addition of IAA shows few transcriptional
differences. At 60 minutes of treatment, the level of three
mRNAs coding for proteins of 22.5, 25, and 33 kilodaltons was
moderately enhanced while the disappearance of a 38 kilodalton
translation product was observed. Additional repression of another
mRNA coding for a 28 kilodalton product begins to show by
this time, but becomes more evident after 4 hours treatment. At
4 hours, four IAA-specific mRNA enhancements coding for proteins
with molecular masses ranging between 35 to 40 kilodaltons
were also observed. We discuss these data in relation to the
possible involvement of IAA-mediated transcriptional regulation
in growth promotion of rice coleoptiles and, more widely, in
control of cell elongation. (literal)
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