Plant growth and nitrate absorption and assimilation of two sweet potato cultivars with different N tolerances in response to nitrate supply.

ABSTRACT: In sweet potato, rational nitrogen (N) assimilation and distribution are conducive to inhibiting vine overgrowth. Nitrate (NO₃^-) is the main N form absorbed by roots, and cultivar is an important factor affecting N utilization. Herein, a hydroponic experiment was conducted that included four NO₃^- concentrations of 0 (N0), 4 (N1), 8 (N2) and 16 (N3) mmol L^-1 with two cultivars of Jishu26 (J26, N-sensitive) and Xushu32 (X32, N-tolerant). For J26, with increasing NO₃^- concentrations, the root length and root surface area significantly decreased. However, no significant differences were observed in these parameters for X32. Higher NO₃^- concentrations upregulated the expression levels of the genes

SUBMITTER: Duan W 

PROVIDER: S-EPMC11393465 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature