Lignin-derived fulvic acid-like substances from spent pulping liquor enhanced rice salt tolerance via K+/Na+ homeostasis modulated by plasma membrane H+-ATPase - Yan Liu; Xiaoqi Wang; Lu Liu; Shan Li; Songyuan Wang; Jinzhao Ma; Duoer Yin; Yao Sun; Yuechao Yang; Yuanyuan Yao (Bioresource Technology, 2026)