1 Maize Research Institute, Sichuan Agricultural University, Chengdu, China 2 Department of Chemistry, Punjab College of Science, Faisalabad, Pakistan 3 State Key Laboratory of Crop Gene Resource Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, China
Maize ( Zea mays L.) is an annual grass that originated in tropical and subtropical regions of the New World. Maize is highly sensitive to cold stress during seed gemination and the seedling phase, which can lead to reductions in plant vigor and grain production. There are large differences in the morphological and physiological changes caused by cold stress among maize varieties.