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Branch roots arise in the pericycle (a cylinder of parenchyma cells lying just inside the endodermis). After seed germination, radicle (part of embryo), develops into the first root. The radicle may develop into tapered taproot. Thinner branch roots arise from tapered taproot.

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  1. Image: http://www.hcs.ohio-state.edu/hcs300/gif/tsroot.gif
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