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The transition from vegetative growth to reproduction is a major developmental event in plants. To maximise reproductive success, its timing is determined by complex interactions between environmental cues like the photoperiod, temperature and nutrient availability and internal genetic programs. While the photoperiod- and temperature- and gibberellic acid-signalling pathways have been subjected to...
Abstract. To investigate the importance of the overall size of the total adenine nucleotide pool for the regulation of primary metabolism in growing potato tubers, freshly cut discs were provided with zero or 2mM adenine in the presence of 1 or 100mM [U-14C]glucose or 100mM [U-14C]sucrose in the presence and absence of 20mM orthophosphate (Pi). Adenine led to a 150250% increase of the total adenine...
Abstract. Freshly cut discs from growing potato tubers were incubated for 3h with 10mM orotate or 10mM uridine. Control discs incubated without precursors showed a 3040% decrease of uridine nucleotides, but not of adenine nucleotides. Orotate- and uridine-feeding led to a 1.5- to 2-fold increase in the levels of uridine nucleotides compared with control discs, and a 1530% increase compared with the...
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