Modulation of Dormancy and Growth Responses in Reproductive Buds of Temperate Trees.

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.

Rootstock influence on iron uptake responses in leaves and their regulation under the Fe paradox effect.

Background And Aims: This work evaluates the regulation of iron uptake responses in Citrus leaves and their involvement in the Fe paradox effect.

Methods: Experiments were performed in field-grown 'Navelina' trees grafted onto two Cleopatra mandarin × (L.) Raf.