Paramural body
Paramural bodies are membranous or vesicular structures located between the cell walls and cell membranes of plant and fungal cells.{{cite journal|last1=Girbardt|first1=Manfred|title=Uber die Substruktur von Polystictus versicolor L.|journal=Archives of Microbiology|date=1957|volume=28|issue=3|pages=255–269|doi=10.1007/BF00411497|s2cid=38092176 }}{{cite journal|last1=Girbardt|first1=M.|title=Licht- und elektronenmikroskopische Untersuchungen an Polystictus versicolor|journal=Archives of Microbiology|date=1961|volume=39|issue=4|pages=351–359|doi=10.1007/BF00411774|s2cid=31105712 }} When these are continuous with the cell wall, they are termed lomasomes, while they are referred to as plasmalemmasomes if associated with the plasmalemma.{{cite book|last1=Dillon|first1=Lawrence S.|title=Ultrastructure, Macromolecules, and Evolution|date=1981|publisher=Springer US|location=Boston, MA|isbn=9781461331476}}{{cite book|last1=Lackie|first1=J.M.|title=The dictionary of cell and molecular biology|date=2013|publisher=Academic Press|location=London|isbn=978-0-12-384931-1|page=382|edition=5th}}
Function
While their function has not yet been studied in great detail, it has been speculated that due to the morphological similarity of paramural bodies to the exosomes produced by mammalian cells, they may perform similar functions such as membrane vesicle trafficking between cells.{{cite journal|last1=An|first1=Qianli|last2=van Bel|first2=Aart|last3=Hückelhoven|first3=Ralph|title=Do Plant Cells Secrete Exosomes Derived from Multivesicular Bodies?|journal=Plant Signaling & Behavior|volume=2|issue=1|pages=4–7|doi=10.4161/psb.2.1.3596|pmc=2633885|year=2007|pmid=19704795}} Current evidence suggests that, like exosomes, paramural bodies are derived from multivesicular bodies.