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Flip-flop method: A new T1-weighted flow-MRI for plants studies

Abstract : The climate warming implies an increase of stress of plants (drought and torrential rainfall). The understanding of plant behavior, in this context, takes a major importance and sap flow measurement in plants remains a key issue for plant understanding. Magnetic Resonance Imaging (MRI) which is well known to be a powerful tool to access water quantity can be used to measure moving water. We describe a novel flow-MRI method which takes advantage of inflow slice sensitivity. The method involves the slice selectivity in the context of multi slice spin echo sequence. Two sequences such as a given slice is consecutively inflow and outflow sensitive are performed, offering the possiblility to perform slow flow sensitive imaging in a quite straigthforward way. The method potential is demonstrated by imaging both a slow flow measurement on a test bench (as low as 10 μm.s−1) and the Poiseuille’s profile of xylemian sap flow velocity in the xylematic tissues of a tomato plant stem.
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Simon Buy, Simon Le Floch, Ning Tang, Rahima Sidiboulenouar, Michel Zanca, et al.. Flip-flop method: A new T1-weighted flow-MRI for plants studies. PLoS ONE, Public Library of Science, 2018, 13 (3), ⟨10.1371/journal.pone.0194845⟩. ⟨hal-01762920⟩

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