title: Parameterization of photosystem II photoinactivation and repair.
abstract: The photoinactivation (also termed photoinhibition or photodamage) of Photosystem II (PSII) and the counteracting repair reactions are fundamental elements of the metabolism and ecophysiology of oxygenic photoautotrophs. Differences in the quantification, parameterization and terminology of Photosystem II photoinactivation and repair can erect barriers to understanding, and particular parameterizations are sometimes incorrectly associated with particular mechanistic models. These issues lead to problems for ecophysiologists seeking robust methods to include photoinhibition in ecological models. We present a comparative analysis of terms and parameterizations applied to photoinactivation and repair of Photosystem II. In particular, we show that the target size and quantum yield approaches are interconvertible generalizations of the rate constant of photoinactivation across a range of incident light levels. Our particular emphasis is on phytoplankton, although we draw upon the literature from vascular plants. This article is part of a Special Issue entitled: Photosystem II.
authors.affiliation: Biology and Biochemistry, Mount Allison University, Sackville, Canada NB E4L 3G7.
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Campbell
authors.forename: Esa
authors.initials: E
authors.lastname: Tyystjärvi
mesh_terms: D008027:Light; D008962:Models, Theoretical; D045332:Photosystem II Protein Complex / Q000037:antagonists & inhibitors* / Q000378:metabolism
chemical_list: D045332:Photosystem II Protein Complex