auxin

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...
   • SE onset depends on a complex network of interactions among plant growth regulators, mainly auxins and cytokinins, during the proembryogenic early stages, and ethylene and gibberellic and abscisic acids later in the development of somatic embryos.2015 August 18, Clelia De-la-Peña et al., “The role of chromatin modifications in somatic embryogenesis in plants”, in Frontiers in Plant Science, volume 6, →DOI