Professor Göran Sandberg and Assistant Professor Karin Ljung at UPSC, has together with colleagues from USA, France, and Argentina been able to identify a gene called TAA1 (Tryptophan Aminotransferase of Arabidopsis) that is directly involved in the synthesis of the plant growth hormone Auxin. The gene is specifically activated during the shade avoidance syndrome, when plants in response to changes in light quality, redirects growth from leaf expension and branching, to stem elongation and flowering. The results are published in the scientific journal Cell: e-link