Hyperauxiny is a state that manifests in plants when the concentration of auxin in the tissues is above the typical level. This occurrence may be due to various causes such as the intrusion of viruses, fungi, bacteria, nematodes, as well as exposure to environmental factors and chemicals. In these circumstances, the common form of auxin that is implicated is indole-3-acetic acid (IAA), and it appears to have a source in the plant host, rather than from the pathogen responsible for the intrusion. For instance, in bacterial wilt of tobacco, which is caused by Pseudomonas solanacearum, IAA’s origin is attributed to the host. Hyperauxiny can also arise from the pathogen’s inactivation or elimination of the host’s auxin-degrading enzymes.