Galls and tumor-like growths on marine macroalgae

Abstract

Galls and tumor-like growths can be found on numerous marine macroalgae. These growths are characterized by cell hyperplasia and hypertrophy producing an abnormal unorganized cell proliferation. Host tissues involved are typically differentiated and are induced to become meristematic after infection. These growths are associated with bacteria, algae, fungi, various animals, and other agents.