Tetrapyrroles pp 274-285 | Cite as

Chlorophyll Breakdown

Part of the Molecular Biology Intelligence Unit book series (MBIU)


Chlorophyll metabolism is probably the most visible manifestation of life. In spite of its obvious ecological importance, chlorophyll catabolism has remained an enigma until about twelve years ago. Contrary to all expectations, chlorophyll breakdown in vascular plants rapidly leads to colorless degradation products. It only fleetingly involves colored intermediates, which result from an oxidative opening of the chlorophyll macrocycle. This stage is rapidly followed by a reduction to shortly existent fluorescent catabolites, which isomerize rapidly to colorless and nonfluorescent tetrapyrrolic catabolites. These latter colorless bilanones accumulate in the vacuoles of the degreened plant material and may represent the final products of controlled chlorophyll break-down in higher plants. This chapter delineates important structural features of chlorophyll catabolites from natural sources and some of the biochemistry of chlorophyll breakdown in higher plants.


Senescent Leaf Chlorophyll Breakdown Chlorella Protothecoides Chlorophyll Catabolite Linear Tetrapyrrole 
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© Landes Bioscience and Springer Science+Business Media 2009

Authors and Affiliations

  1. 1.Institute of Organic ChemistryUniversity of InnsbruckInnsbruckAustria

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