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. 2014 Jan 7;65(2):673–682. doi: 10.1093/jxb/ert427

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© The Author 2014. Published by Oxford University Press on behalf of the Society for Experimental Biology.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — A diagrammatic representation (A) of the relative values for Trifolium repens of outgrowth potential (OP), net root stimulus (NRS), and activation level (AL) of the axillary bud at node position 1 on the primary stem (branching order 1) and for the axillary buds at the first node on each branch of the subsequent hierarchies of branching that could occur on a branch system developing at that node position (calculated where R=0.78 and L (delay in branch development) =2) with L indicated at each level of branching hierarchy; and (B) a plot of the values of OP, NRS, and AL showing the effect of OP in accelerating the reduction in AL as branching hierarchy increases so that AL is rapidly reduced below the threshold value of 6 (broken line) for branch outgrowth.