Two N-acyl-homoserine lactone (acyl-HSL) synthase genes. lasI from Pseudomonas aeruginosa and yenI from Yersinia enterocolitica. were introduced into tobacco. individually and in combination. https://www.roneverhart.com/Castello-di-Amorosa-Il-Barone-Napa-Valley-Cabernet-Sauvignon-2007/