Exogenous Glucose Mediates the Regulation of Root Morphology and Carbon–Nitrogen Metabolism by Indole-3-Acetic Acid (IAA) in Malus baccata (L.) Borkh. in Soil with Low Organic Carbon Content - Dongmei Lang; Deguo Lyu; Zitan Zhu; Sijun Qin (Journal of Plant Growth Regulation, 2019)