N-3-oxo-decanoyl-L-Homoserine lactone is a quorum-sensing signaling molecule that is produced by bacteria in response to increasing cell density.[1] It increases expression of the bacterial conjugation gene tra in A. tumefaciens in a reporter cell assay. N-3-oxo-decanoyl-L-Homoserine lactone (100 nM) induces adventitious root formation and increases expression of the auxin-response genes AUX22c and AUX22d and the cell division genes CDC2, ARC, and CDPK in mung bean seedlings.[2] It decreases expression of glucanase genes in A. thaliana when used at a concentration of 6 μM.[3]

Reference:
[1]. Zhang, L., Murphy, P.J., Kerr, A., et al. Agrobacterium conjugation and gene regulation by N-acyl-L-homoserine lactones. Nature 362(6419), 446-448 (1993).
[2]. Bai, X., Todd, C.D., Desikan, R., et al. N-3-oxo-decanoyl-L-homoserine-lactone activates auxin-induced adventitious root formation via hydrogen peroxide- and nitric oxide-dependent cyclic GMP signaling in mung bean. Plant Physiol. 158(2), 725-736 (2012).
[3]. Schenk, S.T., Hernández-Reyes, C., Samans, B., et al. N-acyl-homoserine lactone primes plants for cell wall reinforcement and induces resistance to bacterial pathogens via the salicylic acid/oxylipin pathway. Plant Cell 26(6), 2708-2723 (2014).