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Lignin deposition within the peduncle abscission zone (AZ) in Litchi. (a) Fruitlet at 25 days after anthesis. Red arrow indicates the peduncle AZ. (b) Lignified cells within peduncle stained with phloroglucinol-hydrogen chloride (HCl). The red box indicates the AZ. Note that the interruption of lignified cells in the cortex, and reduced lignified cells in the pith region. C: Cortex; VB: Vascular bundle; P: Pith region.
