History of Symbiosis

Symbiosis is a form of reticulate evolution that refers to ecological, physiological, and genomic associations between organisms from different species, resulting in interactions, bonds, coexistence, cohabitation, and partnerships. Symbiosis can lead to the emergence of new biological individuals, known as holobionts, that simultaneously function as new units and levels or life zones of evolution. When symbiosis becomes permanent and hereditary, it leads to symbiogenesis or evolution through symbiosis. This entry focuses on the history of the symbiosis theory. Symbiosis research emerged in the 18th century in both botany and zoology, driven by ecological studies of associations between different organisms. Ecological symbiosis research is intellectually rooted in the fields of natural philosophy and natural history. Like the theory of natural selection, theories of symbiosis were initially linked to sociocultural and political ideas about the organizational structure of society, as well as to debates on the nature and redistribution of “common goods” and the “division of labor” in the “economy of nature.” Symbiosis jargon, in part, drove the development of the biomedical and physiological sciences, where scholars commenced research on the influence microorganisms and viruses have on health and disease. Research on the evolutionary impact of symbiosis emerged in the late 19th century, following the discovery of intracellular symbiosis and its role in the origin of cellular structures. This helped pave the way for theories on symbiogenesis.