Plant physiology: The to-and-fro of hormone signals to respond to drought.

Xerobranching, a temporary suppression of root branching when water is limiting, is controlled by the plant hormone abscisic acid (ABA). A recently published study reveals how root branching is dynamically controlled by redistribution in opposite directions of ABA and auxin.
Competing Interests: Declaration of interests P.N.B. is the co-founder and Chair of the Scientific Advisory Board of Hi Fidelity Genetics, Inc., a company that works on crop root growth.
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