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A top-and-bottom split root system of  Lycopersicon lycopersicum  `Burpee's Pixie' was developed using a nonferromagnetic phenolic foam growing medium. The objective of the study was to observe hydrodynamic activity in the roots and substrate when one side of the split root system was dehydrated. After withholding water for 22 days from the top block, the plant and substrate were scanned for 46.5 hours every 30 min using a Siemens 1.5 tesla magnetron whole body imaging system operating at 63 MHz. Resulting images were compiled into a time lapse movie and clearly showed selective root hydration and dehydration on the dry side of the split root system. Those changes in the root MRI signal intensity suggest a cyclic hydration of the roots and a partitioning of water among roots in dry environment.

OBSERVATION OF A SELECTIVE HYDRATION AND CYCLIC WATER MOVEMENT IN LYCOPERSICON LYCOPERSICUM ROOTS USING MAGNETIC RESONANCE IMAGING