Transcriptomic insights into the allelopathic effects of the garlic allelochemical diallyl disulfide on tomato roots

• DOI: 10.1038/srep38902
• Publication Date: 2016-12-12T11:02:50Z
• Authors: Fang Cheng; Zhi-Hui Cheng; Huan-Wen Meng
• Keywords: Diallyl disulfide; Allelopathy

Garlic is an allelopathic crop that can alleviate the obstacles to continuous cropping of vegetable crops. Diallyl disulfide (DADS), one most important allelochemicals in garlic, promotes tomato root growth. Therefore, global transcriptome profiles DADS-treated roots over time were investigated reveal potential growth-promoting mechanisms. We detected 1828, 1296 and 1190 differentially expressed genes (DEGs) 4, 24 48 h samples, respectively. Most DEGs involved assimilatory sulfate reduction glutathione metabolism up-regulated after short-term (4 h) DADS treatment. In addition, increased activity defensive enzymes up-regulation six peroxidase observed, suggesting could induce resistance. plant-pathogen interactions, related calcium signaling primarily inhibited, while those encoding pathogenesis-related proteins up-regulated. Although plant hormone synthesis signal transduction both significantly affected by DADS, expression trends these two pathways conflicting. This research provides comprehensive information concerning changes may help direct further studies on DADS-responsive enhance current understanding mechanisms which alleviates cropping.