Modulation of Dormancy and Growth Responses in Reproductive Buds of Temperate Trees
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2018Cita bibliográfica
Lloret A, Badenes ML and Ríos G (2018) Modulation of Dormancy and Growth Responses in Reproductive Buds of Temperate Trees. Front. Plant Sci. 9:1368.Abstract
During autumn perennial trees cease growth and form structures called buds in
order to protect meristems from the unfavorable environmental conditions, including
low temperature and desiccation. In addition to increased tolerance to these abiotic
stresses, reproductive buds modulate developmental programs leading to dormancy
induction to avoid premature growth resumption, and flowering pathways. Stress
tolerance, dormancy, and flowering processes are thus physically and temporarily
restricted to a bud, and consequently forced to interact at the regulatory level.We review
recent genomic, genetic, and molecular contributions to the knowledge of these three
processes in trees, highlighting the role of epigenetic modifications, phytohormones,
and common regulatory factors. Finally, we emphasize the utility of transcriptomic
approaches for the identification of key structural and regulatory genes involved in bud
processes, illustrated with our own experience using peach as a model.