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Titolo:
Dynamics of the elongation of internodes in maize (Zea mays L.): Analysis of phases of elongation and their relationships to phytomer development
Autore:
Fournier, C; Andrieu, B;
Indirizzi:
INRA, Unite Environm & Grandes Cultures, F-78850 Thiverval Grignon, FranceINRA Thiverval Grignon France F-78850 F-78850 Thiverval Grignon, France
Titolo Testata:
ANNALS OF BOTANY
fascicolo: 3, volume: 86, anno: 2000,
pagine: 551 - 563
SICI:
0305-7364(200009)86:3<551:DOTEOI>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
GROWTH-STAGES; LEAF GROWTH; L-SYSTEM; MODEL; TEMPERATURE; CANOPY; LIGHT; MORPHOGENESIS; ARCHITECTURE; MECHANISMS;
Keywords:
Zea mays L.; internode; elongation; modelling; dynamics; X-rays; collar; phytomer; stem; thermal time; phasic development;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Fournier, C INRA, Unite Environm & Grandes Cultures, F-78850 Thiverval Grignon, France INRA Thiverval Grignon France F-78850 verval Grignon, France
Citazione:
C. Fournier e B. Andrieu, "Dynamics of the elongation of internodes in maize (Zea mays L.): Analysis of phases of elongation and their relationships to phytomer development", ANN BOTANY, 86(3), 2000, pp. 551-563

Abstract

The kinetics of elongation of individual internodes of maize stems were studied under field conditions. Thermal time courses of internode length wererecorded using non-destructive methods, based on direct measurement of X-ray photographs or on indirect estimates using heights of leaf collars. These data were complemented by serial dissections of maize stems, and by precise observation of the process of sheath emergence, to specify its role in the kinetics of internode elongation. The kinetics of elongation were found to be composed of four phases. The rate of elongation rises exponentially during phase I, and then increases sharply during a short period (phase II),which is followed by a major period of constant growth rate (phase III) and a shorter period in which the rate declines (phase IV). During phase I, elongation appears to be integrated at the level of the whole apical cone. From phase II onwards, elongation becomes determined at the level of the phytomer. The emergence of the sheath attached to the internode appears to be a possible trigger for the transition between phase I and phase II, and it may also be involved in variation in final length among phytomers. (C) 2000Annals of Botany Company.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/01/21 alle ore 05:50:22