2024
DOI: 10.1101/2024.02.25.581952
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Cold hardiness-informed budbreak reveals role of freezing temperatures and daily fluctuation in chill accumulation model

Michael G. North,
Beth Ann Workmaster,
Amaya Atucha
et al.

Abstract: Fundamental questions in bud dormancy remain, including what temperatures fulfill dormancy requirements (i.e., chill accumulation). Recent studies demonstrate freezing temperatures promote chill accumulation and cold hardiness influences time to budbreak — the phenotype used for dormancy evaluations. Here we evaluated bud cold hardiness (CH) and budbreak responses of grapevines (Vitis hybrids) throughout chill accumulation under three treatments: constant (5 °C), fluctuating (-3.5 to 6.5 °C daily), and field c… Show more

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