Diagram of the hierarchical abscission program regulating reproductive allocation in P. yedoensis and P. sargentii. (IMAGE)
Caption
Diagram of the hierarchical abscission program regulating reproductive allocation in P. yedoensis and P. sargentii. Model illustrating five spatially and temporally distinct abscission events for petals, the calyx, flower PP, fruit PP, and peduncle–branches, during reproductive development in P. yedoensis and P. sargentii. Each event serves as a developmental gating point that filters reproductive organs based on fertilization status and resource availability. The number of flowers or fruits remaining at each stage, along with the progressively narrowing shaded background, reflects actual retention proportions. In P. yedoensis, petal abscission is pollination-independent, whereas petals are retained in unfertilized flowers and shed only upon fertilization in P. sargentii. These unfertilized flowers are removed via flower PP abscission, and even fertilized flowers undergo a second filtering step through fruit PP abscission, which eliminates a substantial proportion of developing fruits to adjust final fruit number in line with the plant reproductive capacity.
Credit
Horticulture Research
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