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Titolo:
Sense transformation reveals a novel role for class I beta-1,3-glucanase in tobacco seed germination
Autore:
Leubner-Metzger, G; Meins, F;
Indirizzi:
Friedrich Miescher Inst, CH-4058 Basel, Switzerland Friedrich Miescher Inst Basel Switzerland CH-4058 058 Basel, Switzerland
Titolo Testata:
PLANT JOURNAL
fascicolo: 2, volume: 23, anno: 2000,
pagine: 215 - 221
SICI:
0960-7412(200007)23:2<215:STRANR>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
ABSCISIC-ACID; TRANSGENIC TOBACCO; CATALASE GENES; EXPRESSION; DORMANCY; TOMATO; SENSITIVITY; ENDOSPERM; PLANTS; INDUCTION;
Keywords:
abscisic acid; after-ripening; endosperm-limited seed germination; gene function; beta-1,3-glucanase; sense transformation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Leubner-Metzger, G Friedrich Miescher Inst, Maulbeerstr 66, CH-4058 Basel,Switzerland Friedrich Miescher Inst Maulbeerstr 66 Basel Switzerland CH-4058
Citazione:
G. Leubner-Metzger e F. Meins, "Sense transformation reveals a novel role for class I beta-1,3-glucanase in tobacco seed germination", PLANT J, 23(2), 2000, pp. 215-221

Abstract

'Coat-enhanced' seed dormancy of many dicotyledonous species, including tobacco, is released during after-ripening. Rupture of the endosperm, which is the limiting step in tobacco seed germination, is preceded by induction of class I beta-1,3-glucanase (beta GLU I) in the micropylar endosperm wherethe radicle will penetrate. Treating after-ripened tobacco seeds with abscisic acid (ABA) delays endosperm rupture and inhibits beta GLU I induction. Sense transformation with a chimeric ABA-inducible beta GLU I transgene resulted in over-expression of beta GLU I in seeds and promoted endosperm rupture of mature seeds and of ABA-treated after-ripened seeds. Taken together, these results provide direct evidence that beta GLU I contributes to endosperm rupture. Over-expression of beta GLU I during germination also replaced the effects of after-ripening on endosperm rupture. This suggests that regulation of beta GLU I by ABA signalling pathways might have a key role inafter-ripening.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:36:40