Fig. 2 31P-NMR spectra of control (A) and mycorrhizal (B) chestnut roots at different mycorrhization times: (a) 3 weeks after mycorrhizal induction; (b) 1 month after mycorrhizal induction; (c) 3 months after mycorrhizal induction. Pi, intracellular orthophosphate; polyP, polyphosphates&/fig.c:
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