Developing frost risks indicators for apricot trees.
2024
Lamacque, Lia | Charrier, Guillaume | Morris, Cindy E. | Unité de Pathologie Végétale (PV) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant (PIAF) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Clermont Auvergne (UCA)
International audience
Afficher plus [+] Moins [-]anglais. The interaction between a tree’s exposure to frost and its vulnerability can result in crop failure and economic losses for a grower. This represents the so called « risk of frost damage » that is more than the simple likelihood of a freezing event and involves complex phenomenon that depend on numerous biotic and abiotic factors. Characterizing the impact of these factors on the risk of frost damage is particularly important for fruit trees, in order to develop new frost protection measures. Quantification of the abundance of ice nucleation active bacteria and immersion tests of ice nucleation activity on dissected and undissected stems and reproductive organs of apricot trees are providing a better understanding of the conditions leading to ice formation in apricot tissues. Our results show that ice nucleation active bacteria are not involved in ice nucleation of plant material. These results contribute to distinguishing between the role of intrinsicfactors (i.e. linked to the plant itself) and extrinsic factors (i.e. linked to ice nucleation active microorganisms) in the nucleation process.
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