Figure 4.

Noninvasive in vivo MRM analyses of germinated wild-type tobacco seedlings. The proton signal is indicative for the water signal; details as in Figure 3. A, Water distribution in germinated seedlings. Top row, NMR microimages as longitudinal serial sections. Bottom three rows, Transverse serial microimages through one seedling. Small white arrows indicate the emerged root tip. B, Drawing of a germinated tobacco seedling is from Avery (1933). Note that the numbers in A indicate corresponding transverse sections shown in the drawing in B.