نبذة مختصرة : International audience ; Nutation is one of the most striking and ubiquitous example of the rhythmic nature of plant development. Although the consensus is that this wide oscillatory motion is driven by growth, its internal mechanisms remain to be fully elucidated. In this work, we study the specific case of nutation in compound leaves of the Averrhoa carambola plant. We quantify the macroscopic growth kinematics with me lapse imaging, image analysis and modeling. Our results highlight a distinct spatial region along the rachis—situated between the growth and mature zones—where the differential growth driving nuta on is localized. This region coincides with the basal edge of the growth zone, where the average growth rate drops. We further show that this specific spatiotemporal growth pattern implies localized contrac on events within the plant tissue
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