Answers are grounded in this paper and cite their sources.
STRUCTURAL MATURATION OF LEAVES ... Basipetal Maturation .. ... . ... . . .. . .... . ... . . .. . Timing of the Sink-Source Transition . Development of Minor Veins . Bidirectional Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
No takes yet. Share an insight, caveat, or question.
Robert Turgeon (1989) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: