N-feedback regulation is synchronized with nodule carbon alteration in Medicago truncatula under excessive nitrate or low phosphorus conditions
Keywords: ANA, apparent nitrogenase activity; ASN, asparagine; DAT, day after transplanting; DM, dry matter; EAC, electron allocation coefficient; ETC, electron transport chain; FW, fresh weight; GABA, γ-aminobutyric acid; HPLC, high-performance liquid chromatograp