Abstract

Siphonous seaweeds, which constitute a vital component of coral reefs, are structurally simple, single‐celled coenocytic macroscopic green algae. Kim et al.1 have recently shown the extraordinary wound‐repair and propagation mechanism of one such siphonous green alga—Bryopsis plumosa. Nucleocytoplasmic aggregates, which are released after injury to this plant, are membraneless structures that can survive in seawater for 10–20 minutes, before they are surrounded by a gelatinous envelope. Subsequently, a cell membrane and cell wall are synthesized around each of these aggregates and the resulting individual cells, so formed, develop into new plants. This report represents a significant advance in our understanding of wound response and, more significantly, is probably the first example of transient survival of life without a cell membrane! BioEssays 24:588–590, 2002. © 2002 Wiley Periodicals, Inc.