Hydrogen sulphide improves adaptation of Zea mays seedlings to iron deficiency

摘要: Hydrogen sulphide (H2S) is emerging as a potential molecule involved in physiological regulation plants. However, whether H2S regulates iron-shortage responses plants largely unknown. Here, the role of modulating iron availability maize (Zea mays L. cv Canner) seedlings grown iron-deficient culture solution reported. The main results are follows: Firstly, NaHS, donor H2S, completely prevented leaf interveinal chlorosis solution. Secondly, electron micrographs mesophyll cells from revealed plastids with few photosynthetic lamellae and rudimentary grana. On contrary, chloroplasts appeared developed H2S-treated seedlings. Thirdly, treatment increased accumulation by changing expression levels homeostasis- sulphur metabolism-related genes. Fourthly, phytosiderophore (PS) secretion were enhanced Indeed, gene ferric-phytosiderophore transporter (ZmYS1) was specifically induced deficiency leaves roots, whereas their abundance decreased NaHS treatment. Lastly, significantly photosynthesis through promoting protein ribulose-1,5-bisphosphate carboxylase large subunit (RuBISCO LSU) phosphoenolpyruvate (PEPC) genes encoding RuBISCO (RBCL), small (RBCS), D1 (psbA), PEPC These indicate that closely related to uptake, transport, accumulation, consequently increases chlorophyll biosynthesis, chloroplast development,