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Titolo:
Effect of light on root hair formation in Arabidopsis thaliana phytochrome-deficient mutants
Autore:
De Simone, S; Oka, Y; Inoue, Y;
Indirizzi:
Sci Univ Tokyo, Fac Sci & Technol, Dept Appl Biol Sci, Noda, Chiba 2788510, Japan Sci Univ Tokyo Noda Chiba Japan 2788510 l Sci, Noda, Chiba 2788510, Japan
Titolo Testata:
JOURNAL OF PLANT RESEARCH
fascicolo: 1109, volume: 113, anno: 2000,
pagine: 63 - 69
SICI:
0918-9440(200003)113:1109<63:EOLORH>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEED-GERMINATION; RED-LIGHT; INDUCTION; RESPONSES; SEEDLINGS; CALCIUM; GENE; ELONGATION; FLUENCE; GROWTH;
Keywords:
Arabidopsis; phytochrome; photoinduction; phytochrome mutants; root hairs;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Inoue, Y Sci Univ Tokyo, Fac Sci & Technol, Dept Appl Biol Sci, Yamazaki 2641, Noda, Chiba 2788510, Japan Sci Univ Tokyo Yamazaki 2641 Noda Chiba Japan 2788510 8510, Japan
Citazione:
S. De Simone et al., "Effect of light on root hair formation in Arabidopsis thaliana phytochrome-deficient mutants", J PLANT RES, 113(1109), 2000, pp. 63-69

Abstract

The effect of light on the process of root hair formation in phytochrome-deficient mutants of Arabidopsis thaliana lacking phytochrome A, phytochromeB or both (double mutant) were analyzed by comparing their photoresponse with that of the wild type. Results indicate that root hair formation in Arabidopsis was strongly stimulated by light irradiation. Both phytochrome A and phytochrome B are responsible for photoinduction by continuous red lightirradiation, while only phytochrome A mediates the response under continuous far-red light. The fluence response relationships to a red light pulse in the wild type displayed a biphasic trend similar to that previously observed in lettuce seedlings, with the first phase showing a sharp maximum at 78.3 Jm(-2), and the second one operating over a wider fluence range (3,100-9,400 Jm(-2)) two orders of magnitude higher than the first one. Analysis of the fluence response curves for red light induction in the phytochrome mutants revealed that phytochrome A is responsible for the first phase in thewild type, white the second is the result of the combined action of both phytochrome A and phytochrome B.

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Documento generato il 27/11/20 alle ore 07:01:09