Antibodies in Plants

Antibodies are proteins produced by cells of the immune system in response to foreign substances, such as viruses and bacteria. In plants, antibodies are known as pathogenesis-related (PR) proteins and are involved in the plant’s defence against infection. Plants produce several types of PR proteins, each with a specific role in the plant’s immune system. Some of these proteins are capable of directly killing pathogens, while others help to activate other parts of the immune system. For example, certain PR proteins can activate the production of defensive chemicals and hormones that help to keep the pathogen away. PR proteins are also involved in regulating the plant’s responses to stress. For example, when a plant is exposed to cold temperatures it can produce PR proteins that help to reduce cell damage and protect the plant from cold-induced stress. In addition to their role in defending against pathogens, PR proteins also play a role in regulating the growth and development of the plant. For example, certain PR proteins can help to regulate the growth of leaves and flowers, or even help to protect the plant from drought.