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Titolo:
Fructans and fructan-metabolizing enzymes in leaves of Lolium perenne
Autore:
Pavis, N; Boucaud, J; Prudhomme, MP;
Indirizzi:
Univ Caen, INRA, UA, Lab Physiol & Biochim Vegetales, F-14032 Caen, FranceUniv Caen Caen France F-14032 & Biochim Vegetales, F-14032 Caen, France
Titolo Testata:
NEW PHYTOLOGIST
fascicolo: 1, volume: 150, anno: 2001,
pagine: 97 - 109
SICI:
0028-646X(200104)150:1<97:FAFEIL>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
FESCUE LEAF BLADES; ASPARAGUS-OFFICINALIS L; TALL FESCUE; ELONGATION ZONE; EXCISED LEAVES; BARLEY LEAVES; FRUCTOSYLTRANSFERASE ACTIVITIES; HELIANTHUS-TUBEROSUS; CARBOHYDRATE CONTENT; SPATIAL-DISTRIBUTION;
Keywords:
fructans; fructan : fructan 6G-fructosyltransferase; Lolium; synthesis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Prud'homme, MP Univ Caen, INRA, UA, Lab Physiol & Biochim Vegetales, F-14032 Caen, France Univ Caen Caen France F-14032 tales, F-14032 Caen, France
Citazione:
N. Pavis et al., "Fructans and fructan-metabolizing enzymes in leaves of Lolium perenne", NEW PHYTOL, 150(1), 2001, pp. 97-109

Abstract

Longitudinal variability is reported in internal carbon partitioning as isthe activity of enzymes involved in fructan synthesis during leaf development of Lolium perenne cv. Bravo. Sink activity was reduced in L. perenne plants by cooling the roots while continuous illumination enhanced source activity, resulting in preferentialaccumulation of fructans at the leaf base. Fructan contents and enzymatic activity of two trisaccharides (SST (sucrose:sucrose fructosyltransferase) and 6G-FT (fructan:fructan 6C-fructosyltransferase)) were measured in segments of elongating leaves, both mature leaf blades and sheaths. The complement of fructans accumulated was similar in both elongating leaves and mature leaf sheaths. 6G-FT activity was found in L. perenne and characterized in a crude extract; this activity was greatest in the basal segment of elongating leaves and mature leaf sheaths. Throughout the leaf blade,however, SST and 6G-FT activities remained low and constant, and did not increase under conditions of sucrose accumulation. Differences are shown in fructan accumulation between leaf tissues; the significance of these findings and the putative pathway of fructan synthesis in L perenne are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:24:46