Physiological response to low-nitrogen stress and comprehensive evaluation in four rice varieties

• DOI: 10.32615/ps.2024.028
• Publication Date: 2024-08-06T07:34:08Z
• Authors: Y.F. ZHANG; H. CAI; E.T. YOU; X.Q. QIAO; Z.P. GAO; G.X. CHEN
• Keywords: Stomatal Conductance; Nitrogen balance; Nitrogen deficiency

Rice (<i>Oryza sativa</i> L.) research has rarely focused on the response to low-nitrogen stress in different subtypes previously and lacked a tolerance evaluation system. Here, we investigated physiological characteristics under moderate conditions two <i>japonica</i> cultivars (NG46 NG9108) <i>indica</i> (LYP9 9311). Using subordinate function analysis principal component analysis, of four rice varieties was comprehensively evaluated; stomatal conductance, total carotenoid content, nitrate reductase NR activity were taken as Among cultivars, NG46 LYP9 had significant advantages photosynthetic gas-exchange capacity, optimizing balance between light-harvesting ratio reaction center inactivation, magnitude decrease heat dissipation, nitrogen-metabolism enzyme activities. The results mechanisms adaptation offered reliable method for assessing rice.