Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Observations on the sequence of events in the rejection reaction in Botryllus oozooids
Student Author(s): Nagashima, Laura
Faculty Advisor(s): Abbott, Don
Pages: 26
Location: Final Papers Biology 175H
Date: June 1981
Keywords: ascidians
Abstract: The rejection reaction following tip - to - side contact between two vascular ampullae of two incompatable Botryllus oozooids differs in the two ampullae. The ampulla that initiated contact (agressor) forms a distal blood clot and responds in one of three ways that differ in their degree of injury to the agressing ampulla: (1) loss or injury to the ampullar pad cells (2) loss of distal end of ampulla by constriction (3) rapid ampullar disintigration. The receiving ampulla showed a more subtle rejection response, as did some other apmullae of the oozooid pair not involved in an ampullar contact.