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Titolo:
ACCUMULATION OF ASCORBIC-ACID IN THE COTYLEDONS OF MORNING GLORY (PHARBITIS-NIL) SEEDLINGS DURING THE INDUCTION OF FLOWERING BY LOW-TEMPERATURE TREATMENT AND THE EFFECT OF PRIOR EXPOSURE TO HIGH-INTENSITY LIGHT
Autore:
HIRAI N; KOJIMA Y; SHINOZAKI M; KOSHIMIZU K; MUROFUSHI N; TAKIMOTO A;
Indirizzi:
KYOTO UNIV,FAC AGR,SAKYO KU KYOTO 60601 JAPAN UNIV TOKYO,DEPT APPL BIOL CHEM,BUNKYO KU TOKYO 113 JAPAN LAB EXPTL BIOL,KITA KU KYOTO 603 JAPAN
Titolo Testata:
Plant and Cell Physiology
fascicolo: 7, volume: 36, anno: 1995,
pagine: 1265 - 1271
SICI:
0032-0781(1995)36:7<1265:AOAITC>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROGEN-PEROXIDE; POOR NUTRITION; HYDROXYLASE; OXIDATION;
Keywords:
ASCORBIC ACID; FLOWERING; HIGH-INTENSITY LIGHT; LOW TEMPERATURE; PHARBITIS NIL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
N. Hirai et al., "ACCUMULATION OF ASCORBIC-ACID IN THE COTYLEDONS OF MORNING GLORY (PHARBITIS-NIL) SEEDLINGS DURING THE INDUCTION OF FLOWERING BY LOW-TEMPERATURE TREATMENT AND THE EFFECT OF PRIOR EXPOSURE TO HIGH-INTENSITY LIGHT", Plant and Cell Physiology, 36(7), 1995, pp. 1265-1271

Abstract

Seedlings of Pharbitis nil strain 'Violet' were cultured at a low temperature, which induces their flowering even in continuous light, withor without prior exposure to high-intensity light, which enhances theflower-inducing effect of the exposure to low temperature. Analysis by HPLC of extracts of cotyledons showed that the level of an unstable compound increased during these treatments, in addition to the increase in levels of phenylpropanoids reported previously. The compound was identified as ascorbic acid from the spectroscopic data. The change inthe concentration of ascorbic acid at low temperature was correlated with the increase in the induction of flowering and the increase in levels of the phenylpropanoids. The rapid increase in level of ascorbic acid after exposure to high-intensity light reflected the promotive effect of high-intensity light on the induction of flowering at low temperature. However, levels of ascorbic acid also increased in seedlings of P. nil strain 'Kidachi' that were cultured in high-intensity light,a treatment that does not induce flowering in this strain. Thus, ascorbic acid cannot be associated with the induction of flowering by high-intensity light alone. Ascorbic acid increased the rate of formation of caffeic acid from p-coumaric acid in vitro, a result that suggests that ascorbic acid might be involved in the increases in levels of phenylpropanoids in the seedlings.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 08:04:48