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Cross sections of pseudonodules induced by TIBA or NPA treatment. Pseudonodules were induced on the roots of (A,B) M. truncatula, (C,D) T. subterraneum (subclover), and (E,F) S. rostrata. Asterisks indicate location of the primary root vasculature. Arrows indicate pericycle and endodermal cell divisions. Scale bars represent 500 μm. Abbreviations: TIBA, 2,3,5-triiodobenzoic acid and NPA, 1-N-naphthylphthalamic acid.
