The Application of Nitrogen Source in Regulating Lignin Biosynthesis, Storage Root Development and Yield of Sweet Potato

The understanding of the effects nitrogen sources on lignin synthesis in sweet potato during storage root formation is limited. In this study, we investigated different source and development, as well potential roots. cultivars Shangshu 19 Jixu 23 were used field experiments 2019 2020. Three treatments tested: (a) no fertilizer application (control); (b) 60 kg hm?2 ammonium nitrogen; (c) amide nitrogen. results indicate that formation, significantly enhanced activity compared to control. treatment promoted IbEXP1 inhibited Ibkn1 Ibkn2 expression early stages then increased gibberellic acid decreased zeatin riboside content, phenylalanine ammonia lyase peroxidase activities, opposite gene expression, hormone contents, enzyme observed late formation. Relative control, number roots canopy closure. produced highest yield per plant. These indicated can inhibit synthesis, promote increase potato.