Auxin concentrations in nodes and internodes of Impatiens sultani
Greater concentrations of auxin at nodes than in internodes, resulting from some nodal barrier to basipetal transport, have long been postulated as the cause of early differentiation of initially isolated xylem and cambium at the nodes. However, this study, using [14C] indole-3-acetic acid (IAA) applied apically and gas chromatography-mass spectrometry, found that in stems of Impatiens sultani the IAA concentrations (per unit f. wt) at nodes were similar to those in adjacent internodes, though...[Show more]
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|Source:||Annals of Botany|
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