Flower development of five sweet cherry cultivars was examined weekly under stereoscopic and optical microscopes over 3 years. That chilling is required for the completion of flower development led us to hypothesize that a particular stage of flower development may be consistently associated with the dormant phase of flower bud development. This was noticed over 100 years ago, but the biological mechanisms underlying cold regulated dormancy and its release remain poorly understood.
In temperate woody deciduous perennials, dormancy is a survival strategy to persist winter temperatures but chilling is also required for the release of flower bud dormancy and for the completion of flower development. 1583-1594 ISSN: 0931-1890 Subject: Prunus avium, anthers, autumn, cell biology, cold, cold treatment, cultivars, dormancy, flower buds, flower primordia, flowering date, microscopes, perennials, pistil, plant ovary, shoots, spring, stigma, temperature, winter Abstract: KEY MESSAGE: Comparison of five sweet cherry cultivars-over 3 years-shows an asynchronous early and late flower development, but a consistent, specific flower developmental stage for dormancy. Is there a specific stage to rest? Morphological changes in flower primordia in relation to endodormancy in sweet cherry (Prunus avium L.) Author: Erica Fadón, Javier Rodrigo, Maria Herrero Source: Trees 2018 v.32 no.6 pp.
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