résuméPlants are constantly subjected to external mechanical loads such as wind, rain or even neighbours. These stimuli are known to affect the growth of the plants, a process called thigmomorphegenesis. Interestingly, plants physiological responses to these external loads is sometimes observed far from the stimulated area, which suggests the transportation of information through the plant. Among the different hypothesis found in the literature to account for this long-distance transport (electrical signal, hormone transport), it has been proposed that local mechanical stimuli (bending) could generate an hydraulic pulse that moves through the xylem. This appealing idea seems to be supported by recent experiments made in the PIAF laboratory ...
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