Budbreak patterns and phytohormone dynamics reveal different modes of action between hydrogen cyanamide- and defoliant-induced flower budbreak in blueberry under inadequate chilling conditions
Fig 4
Phytohormone dynamics in flower buds of ‘Emerald’ blueberry grown under inadequate chilling conditions as affected by hydrogen cyanamide (HC) and zinc sulfate (ZS) in the 2018–2019 season (Expt. 1).
(A) Abscisic acid (ABA). (B) Gibberellin 4 (GA4). (C) Jasmonic acid (JA). (D) Indole-3-acetic acid (IAA). Treatments are as described in Fig 1. Pre-treatment samples (8 days before treatment) were pooled as a composite control sample. Means (n = 3–4) with the same or no letter within each measurement day are not significantly different (Tukey–Kramer test, P < 0.05).