Plants use gravity as a guide for growth and development. Gravitropism, a gravity-directed growth process, directs upward shoot movement for efficient photosynthesis and gaseous exchange. In addition, it also directs downward growth of roots in soil, for assimilation of water and nutrients required for growth and development. Using time lapse video imaging this process can be efficiently studied in a real time scale. The analysis of the response under different conditions can help to unravel the mechanisms regulating gravitropism.
