auxin

Definitions:

  • Any of several plant hormones that regulate various functions, including cell elongation.
  • a substance which, in small concentrations, promotes root formation, bud growth, or certain other processes such as fruit ripening or leaf drop in plants.
  • A class of plant growth substance (often called <xref>phytohormones</xref> or <xref>plant hormones</xref>) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
  • a plant hormone that promotes root formation and bud growth
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