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dc.contributor.authorBlackstone, Neil W.
dc.contributor.authorCherry Vogt, Kimberly S.
dc.contributor.authorGeddes, Gabrielle
dc.contributor.authorBross, Lori
dc.date.accessioned2013-02-12T17:02:17Z
dc.date.available2013-02-12T17:02:17Z
dc.date.issued2008-03
dc.identifier.citationCherry Vogt KS, Geddes GC, Bross LS, Blackstone NW. 2008. Physiological characterization of stolon regression in a colonial hydroid. J Exp Biol 211:731-740.en_US
dc.identifier.issn0022-0949
dc.identifier.urihttp://commons.lib.niu.edu/handle/10843/13413
dc.identifier.urihttp://hdl.handle.net/10843/13413
dc.description.abstractAs with many colonial animals, hydractiniid hydroids display a range of morphological variation. Sheet-like forms exhibit feeding polyps close together with short connecting stolons, whereas runner-like forms have more distant polyps and longer connecting stolons. These morphological patterns are thought to derive from rates of stolon growth and polyp formation. Here, stolon regression is identified and characterized as a potential process underlying this variation. Typically, regression can be observed in a few stolons of a normally growing colony. For detailed studies, many stolons of a colony can be induced to regress by pharmacological manipulations of reactive oxygen species (e.g. hydrogen peroxide) or reactive nitrogen species (e.g. nitric oxide). The regression process begins with a cessation of gastrovascular flow to the distal part of the stolon. High levels of endogenous H2O2 and NO then accumulate in the regressing stolon. Remarkably, exogenous treatments with either H2O2 or an NO donor equivalently trigger endogenous formation of both H2O2 and NO. Cell death during regression is suggested by both morphological features, detected by transmission electron microscopy, and DNA fragmentation, detected by TUNEL. Stolon regression may occur when colonies detect environmental signals that favor continued growth in the same location rather than outward growth.en_US
dc.language.isoen_USen_US
dc.publisherThe Company of Biologistsen_US
dc.subjectCell deathen_US
dc.subjectclonal organismen_US
dc.subjectcnidarianen_US
dc.subjectevolution and developmenten_US
dc.subjectevolutionary morphologyen_US
dc.subjecthydroiden_US
dc.subjectPodocorynaen_US
dc.subjectPodocoryneen_US
dc.subjectreactive oxygen speciesen_US
dc.subjectreactive nitrogen speciesen_US
dc.titlePhysiological Characterization of Stolon Regression in a Colonial Hydroiden_US
dc.typeArticleen_US
dc.contributor.departmentDepartment of Biological Sciences


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