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Titolo:
THE CONTROL OF SOURCE TO SINK CARBON FLUX DURING TUBER DEVELOPMENT INPOTATO
Autore:
SWEETLOVE LJ; KOSSMANN J; RIESMEIER JW; TRETHEWEY RN; HILL SA;
Indirizzi:
UNIV OXFORD,DEPT PLANT SCI,S PARKS RD OXFORD OX1 3RB ENGLAND UNIV OXFORD,DEPT PLANT SCI OXFORD OX1 3RB ENGLAND MAX PLANCK INST MOL PFLANZENPHYSIOL D-14476 GOLM GERMANY
Titolo Testata:
Plant journal
fascicolo: 5, volume: 15, anno: 1998,
pagine: 697 - 706
SICI:
0960-7412(1998)15:5<697:TCOSTS>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
INCREASED ADPGLUCOSE PYROPHOSPHORYLASE; METABOLIC CONTROL-THEORY; YEAST-DERIVED INVERTASE; SPLIT ROOT SYSTEMS; TOP-DOWN APPROACH; SOLANUM-TUBEROSUM; SUCROSE TRANSPORTER; PLANT-GROWTH; APOPLASTIC EXPRESSION; CONTROL COEFFICIENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
47
Recensione:
Indirizzi per estratti:
Citazione:
L.J. Sweetlove et al., "THE CONTROL OF SOURCE TO SINK CARBON FLUX DURING TUBER DEVELOPMENT INPOTATO", Plant journal, 15(5), 1998, pp. 697-706

Abstract

We have used top-down metabolic control analysis to investigate the control of carbon flux through potato (Solanum toberosum) plants duringtuberisation. The metabolism of the potato plant was divided into twoblocks of reactions (the source and sink blocks) that communicate through the leaf apoplastic sucrose pool. Flux was measured as the transfer of C-14 from CO2 to the tuber. Flux and apoplastic sucrose concentration were varied either by changing the light intensity or using transgenic manipulations that specifically affect the source or sink blocks, and elasticity coefficients were measured. We have provided evidence in support of our assumption that apoplastic sucrose is the only communicating metabolite between the source and sink blocks. The elasticity coefficients were used to calculate the flux control coefficients of the source and sink blocks, which were 0.8 and 0.2, respectively. This work suggests that the best strategy for the manipulation of tuber yield in potato will involve increases in photosynthetic capacity, rather than sink metabolism.

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Documento generato il 14/07/20 alle ore 06:48:54