Abstract
The crown of the Siberian fir (Abies sibirica) is characterized by a specific organization, namely, a narrow-pyramidal form, apical dominance, tiering by types of sexualization, and whorled branching. The gravitational vector is clearly manifested at all levels of the organization of the crown, that is, in the architecture (diageotropism of branches), morphostructure (dorsoventrality of tissues and organs of shoots, as well as the location of reproductive organs in the tree crown and on the shoot), and physiological processes. It was shown that the internal state of the tree is a determining factor in graviperception. When Siberian fir trees weaken, the diageotropism of branches is lost, which can serve as a universal biomarker of impairment of homeostasis.
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Bazhina, E.V. Changes in Siberian Fir Crown Architecture under Impaired Homeostasis. BIOPHYSICS 65, 642–648 (2020). https://doi.org/10.1134/S0006350920040041
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DOI: https://doi.org/10.1134/S0006350920040041