Journal Article Maize Drought tolerance Plant Proteins AP2 gene Antioxidants ChIP-Seq Circadian clock Comparative Study Drought stress Floral transition Flower development Nuclear Pore Complex Proteins Overexpression PP2C protein Photoperiod Plant Growth Regulators RNA-Seq Research Support, Non-U.S. Gov't Salt stress Transgenic plants Zea mays ZmEREB24 ZmGI2 ZmNF-YC2 ZmNUP58 flowering time intramolecular charge transfer maize map-based cloning