This course mainly introduces the mechanisms and principles related to plant growth and development. Moreover establish the foundation for students to learn plant science. This course includes the basic concepts of growth and development of plants, the effects of plant hormones on plant growth and development, and the response of crops to environmental factors. This course starts with an introduction to the basic structure of plant, and the follow-up includes the affecting factors during the formation processing of plant structures, the resisting strategies of plants during stress, and the introduction about utility of plant growth regulators in crop cultivation.