Our paper has just been published in a special issue of Plant Biotechnology! We have rediscovered that 4PBA (4-phenylbutyric acid) acts as an auxin. It appears to be converted to PAA (phenylacetic acid), known as natural auxin, in Arabidopsis thaliana. https://t.co/4jDU9RibKp https://t.co/x0m7yferdv