Plant cell culture is a technique used to grow plant cells, tissues, or organs in a controlled environment, usually in a nutrient-rich medium. This method allows scientists to study plant growth, development, and responses to various conditions without the influence of external factors. The process involves isolating specific cells or tissues from a plant and placing them in a sterile container with the appropriate nutrients and hormones. This can lead to the regeneration of whole plants or the production of valuable compounds, making it an essential tool in agriculture, biotechnology, and pharmaceutical research.