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Titolo:
Genotypic differences in seed growth rates of Phaseolus vulgaris L. - II. Factors contributing to cotyledon sink activity and sink size
Autore:
Tegeder, M; Thomas, M; Hetherington, L; Wang, XD; Offler, CE; Patrick, JW;
Indirizzi:
Univ Newcastle, Dept Biol Sci, Newcastle, NSW 2308, Australia Univ Newcastle Newcastle NSW Australia 2308 ewcastle, NSW 2308, Australia Univ Tubingen, Inst Bot, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 st Bot, D-72076 Tubingen, Germany
Titolo Testata:
AUSTRALIAN JOURNAL OF PLANT PHYSIOLOGY
fascicolo: 2, volume: 27, anno: 2000,
pagine: 119 - 128
SICI:
0310-7841(2000)27:2<119:GDISGR>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
VICIA-FABA L; DEVELOPING SOYBEAN COTYLEDONS; SUCROSE BINDING-PROTEIN; DERMAL TRANSFER CELLS; SUGAR UPTAKE; TRANSPORT; EXPRESSION; GENES; PLANTS; NUMBER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Patrick, JW Univ Newcastle, Dept Biol Sci, Newcastle, NSW 2308, Australia Univ Newcastle Newcastle NSW Australia 2308 W 2308, Australia
Citazione:
M. Tegeder et al., "Genotypic differences in seed growth rates of Phaseolus vulgaris L. - II. Factors contributing to cotyledon sink activity and sink size", AUST J PLAN, 27(2), 2000, pp. 119-128

Abstract

A previous study [Thomas et al. (2000) Aust. J. Plant Physiol. 27, 109-118] showed that genotypic differences in seed growth rates of Phaseolus vulgaris L. cultivars was accounted for by variation in dry matter flux and seedsize. Bulk cotyledon saps contained identical concentrations of sucrose across cultivars suggesting that genotypic variation in capacities for sucrose transport and metabolism are equally matched. Cotyledon sucrose transport, monitored as in vitro uptake of [C-14] sucrose, exhibited genotypic variation and this was abolished by parachloromercuribenzene-sulfonate. Eadie-Hofstee transformations of concentration-dependent [C-14] sucrose uptake showed that genotypic variation in sucrose flux resulted from differences in maximal transporter activity. Maximal sucrose fluxes and levels of transcriptand microsomal protein for the sucrose/H+ symporter and H+-ATPase were positively correlated. In contrast, sucrose binding protein transcript and microsomal protein levels correlated negatively with sucrose fluxes. In all cultivars, a sucrose/H+ symporter and H+-ATPase were co-localised to plasma membranes of the dermal cell complexes. Total plasma membrane surface areas of the dermal cell complexes and total volume of storage parenchyma cells correlated with cultivar variation in seed growth rates. Differences in cellnumber and size accounted for cultivar variation in total plasma membrane surface area of the dermal cell complexes and total storage parenchyma cellvolume.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 05:17:16