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Titolo:
Carbohydrates in individual cells of epidermis, mesophyll, and bundle sheath in barley leaves with changed export or photosynthetic rate
Autore:
Koroleva, OA; Farrar, JF; Tomos, AD; Pollock, CJ;
Indirizzi:
Univ Wales, Sch Biol Sci, Bangor, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales es, Sch Biol Sci, Bangor, Gwynedd, Wales Inst Grassland & Environm Res, Aberystwyth, Dyfed, Wales Inst Grassland & Environm Res Aberystwyth Dyfed Wales wyth, Dyfed, Wales
Titolo Testata:
PLANT PHYSIOLOGY
fascicolo: 4, volume: 118, anno: 1998,
pagine: 1525 - 1532
SICI:
0032-0889(199812)118:4<1525:CIICOE>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOLIUM-TEMULENTUM L; FRUCTAN BIOSYNTHESIS; EXCISED LEAVES; DENOVO SYNTHESIS; HIGHER-PLANTS; METABOLISM; SUCROSE; TRANSPORT; PATTERNS; ENZYMES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Koroleva, OA Univ Wales, Sch Biol Sci, Bangor, Gwynedd, Wales Univ Wales Bangor Gwynedd Wales Sci, Bangor, Gwynedd, Wales
Citazione:
O.A. Koroleva et al., "Carbohydrates in individual cells of epidermis, mesophyll, and bundle sheath in barley leaves with changed export or photosynthetic rate", PLANT PHYSL, 118(4), 1998, pp. 1525-1532

Abstract

Carbohydrate metabolism of barley (Hordeum vulgare) leaves induced to accumulate sucrose (Suc) and fructans was investigated at the single-cell levelusing single-cell sampling and analysis. Cooling of the root and shoot apical meristem of barley plants led to the accumulation of Suc and fructan inleaf tissue. Suc and fructan accumulated in both mesophyll and parenchymatous bundle-sheath (PBS) cells because of the reduced export of sugars from leaves under cooling and to increased photosynthesis under high photon fluence rates. The general trends of Suc and fructan accumulation were similar for mesophyll and PBS cells. The fructan-to-Suc ratio was higher for PBS cells than for mesophyll cells, suggesting that the threshold Suc concentration needed for the initiation of fructan synthesis was lower for PBS cells. Epidermal cells contained very low concentrations of sugar throughout the cooling experiment. The difference in Suc concentration between control and treated plants was much less if compared at the single-cell level rather than the whole-tissue level, suggesting that the vascular tissue contains a significant proportion of total leaf Sue. We discuss the importance of analyzing complex tissues at the resolution of individual cells to assign molecular mechanisms to phenomena observed at the whole-plant level.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 16:39:00