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Titolo:
Evidence for symplastic phloem unloading in sink leaves of barley
Autore:
Haupt, S; Duncan, GH; Holzberg, S; Oparka, KJ;
Indirizzi:
Scottish Crop Res Inst, Cell Biol Unit, Dundee DD2 5DA, Scotland Scottish Crop Res Inst Dundee Scotland DD2 5DA Dundee DD2 5DA, Scotland Large Scale Biol Corp, Vacaville, CA 95688 USA Large Scale Biol Corp Vacaville CA USA 95688 orp, Vacaville, CA 95688 USA
Titolo Testata:
PLANT PHYSIOLOGY
fascicolo: 1, volume: 125, anno: 2001,
pagine: 209 - 218
SICI:
0032-0889(200101)125:1<209:EFSPUI>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
GREEN FLUORESCENT PROTEIN; DEVELOPING TOBACCO-LEAVES; HORDEUM-VULGARE L; LEAF BLADES; TRANSPORT; PATHWAY; PLASMODESMATA; TISSUES; CARBON; VIRUS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Oparka, KJ Scottish Crop Res Inst, Cell Biol Unit, Dundee DD2 5DA, Scotland Scottish Crop Res Inst Dundee Scotland DD2 5DA 5DA, Scotland
Citazione:
S. Haupt et al., "Evidence for symplastic phloem unloading in sink leaves of barley", PLANT PHYSL, 125(1), 2001, pp. 209-218

Abstract

The pathway of phloem unloading in sink barley (Hordeum vulgare) leaves was studied using a combination of electron microscopy, carboxyfluorescein transport, and systemic movement of barley stripe mosaic virus expressing thegreen fluorescent protein. Studies of plasmodesmatal frequencies between the phloem and mesophyll indicated a symplastic sieve element- (SE) unloading pathway involving thick-walled and thin-walled SEs. Phloem-translocated carboxyfluorescein was unloaded rapidly from major longitudinal veins and entered the mesophyll cells of sink leaves. Unloading was "patchy" along the length of a vein, indicating that sieve element unloading may be discontinuous along a single vascular bundle. This pattern was mirrored precisely by the unloading of barley stripe mosaic virus expressing the green fluorescent protein. Transverse veins were not utilized in the unloading process. Thedata collectively indicate a symplastic mechanism of SE unloading in the sink barley leaf.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 11:25:39