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Titolo:
Evidence of phytochrome mediation in the low-pH-induced root hair formation process in lettuce (Lactuca sativa L. cv. grand rapids) seedlings
Autore:
De Simone, S; Oka, Y; Nishioka, N; Tadano, S; 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: 45 - 53
SICI:
0918-9440(200003)113:1109<45:EOPMIT>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
EPIDERMAL-CELL DIFFERENTIATION; FLUENCE-RESPONSE CURVES; ARABIDOPSIS-THALIANA; SEED-GERMINATION; HYPOCOTYL GROWTH; TIP GROWTH; RED-LIGHT; GENE; ELONGATION; CALCIUM;
Keywords:
Lactuca sativa L.; low pH; photoinduction; phytochrome; root hair;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
66
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., "Evidence of phytochrome mediation in the low-pH-induced root hair formation process in lettuce (Lactuca sativa L. cv. grand rapids) seedlings", J PLANT RES, 113(1109), 2000, pp. 45-53

Abstract

The role of light for the low-pH-induced root hair formation process in lettuce seedlings was reported. A high rate of root hair formation was induced by low-pH (pH 4.0) treatment under continuous white light, while no root hairs were observed in the dark irrespective of pH conditions. The fluence requirement for root hair initiation was lower than that for root hair elongation, indicating that two different mechanisms operate in the photoinduction of mature root hairs. With regard to root hair initiation, red and bluelight were equally effective, even more than white light, while little initiation was obtained with far-red light. The fluence response curve for redand blue light was biphasic and showed two maxima at about 100 and 1,000 Jm(-2). The inductive effect of 100 Jm(-2) red light could be partially reversed by subsequent far-red light only one time. On the other hand, the inductive effect of 1,000 Jm(-2) red light was partially reversed by subsequentfar-red light irradiation at least twice. These results indicate the involvement of phytochrome in this response. The inductive effect of blue light was repeatedly reversed by subsequent far-red light irradiation, suggestingthat the blue-light induction was mainly mediated by phytochrome.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/11/20 alle ore 20:23:36