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Titolo:
Content and composition of carbohydrates in developing needles of Siberianspruce
Autore:
Robakidze, EA; Patov, AI;
Indirizzi:
Russian Acad Sci, Ural Div, Komi Res Ctr, Inst Biol, Syktyvkar 167610, Russia Russian Acad Sci Syktyvkar Russia 167610 Biol, Syktyvkar 167610, Russia
Titolo Testata:
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
fascicolo: 2, volume: 47, anno: 2000,
pagine: 219 - 225
SICI:
1021-4437(200003/04)47:2<219:CACOCI>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
METABOLISM;
Keywords:
Picea obovata; needles; growth; carbohydrates; monosaccharides; oligosaccharides; hemicelluloses; water soluble polysaccharides;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Robakidze, EA Russian Acad Sci, Ural Div, Komi Res Ctr, Inst Biol, Kommunisticheskaya Ul28, Syktyvkar 167610, Russia Russian Acad Sci Kommunisticheskaya Ul 28 Syktyvkar Russia 167610
Citazione:
E.A. Robakidze e A.I. Patov, "Content and composition of carbohydrates in developing needles of Siberianspruce", RUSS J PL P, 47(2), 2000, pp. 219-225

Abstract

Changes in mono- and oligosaccharides, hemicelluloses, and water-soluble polysaccharides related to the development of needles were studied in Siberian spruce (Picea obovata Ledeb.) trees grown in a bilberry spruce forest ofa middle latitude taiga zone. The total carbohydrate content in needles varied during the year between 13.5 and 20.6% of the dry weight. In particular, the ranges of variation were 5.2-8.4% for monosaccharides, 0.1-2.4% for oligosaccharides, 6.5-11.2% for hemicelluloses, and 0.2-1.1% for water-soluble polysaccharides. The carbohydrate content in needles and the ratio between individual carbohydrate fractions changed with needle development. During rapid biomass accumulation in the first-year needles, the total carbohydrate content declined at the expense of monosaccharides, hemicelluloses, and water-soluble polysaccharides. The carbohydrate reserves were found to restore upon retardation and cessation of growth of the first-year needles. Thus, hemicelluloses and water-soluble polysaccharides, which serve as reserve carbohydrates in the second-year needles, are metabolized during the period of active growth of the first-year needles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 19:17:59