The PGPR Pantoea endophytica and silica nanoparticles coordinate root–rhizosphere dynamics to enhance cold tolerance in Osmanthus fragrans - Xiaofeng Zhang; Xinyi Liu; Qingyin Tian; Mengyao Wei; Gongwei Chen; Tingting Shi; Yuanzheng Yue; Lianggui Wang; Xiulian Yang (Plant and Soil, 2026)