auxins

Noun

auxin (countable and uncountable, plural auxins)

1. A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
   • In Arabidopsis roots, cold stress may reduce shootward auxin transport and alter the intracellular auxin gradient.2015 July 2, Yang Y-W, Chen H-C, Jen W-F, Liu L-Y, Chang M-C, “Comparative Transcriptome Analysis of Shoots and Roots of TNG67 and TCN1 Rice Seedlings under Cold Stress and Following Subsequent...