Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

Land plant chloroplasts evolved from those found in the green algae. During land plant evolution, nuclear regulatory mechanisms have been modified to produce morphologically and functionally diverse chloroplasts in distinct developmental contexts. At least some of these mechanisms evolved independently in different plant lineages. In angiosperms, GOLDEN2-LIKE (GLK) transcription factors regulate the development of at least three chloroplast types. To determine whether GLK-mediated regulation of chloroplast development evolved within angiosperms or is a plesiomorphy within land plants, gene function was examined in the moss Physcomitrella patens. Gene expression patterns and loss-of-function mutant phenotypes suggested that GLK gene function is conserved between P. patens and Arabidopsis thaliana, species that diverged >400 million years ago. In support of this suggestion, moss genes partially complement Arabidopsis loss-of-function mutants. Therefore, GLK-mediated regulation of chloroplast development defines one of the most ancient conserved regulatory mechanisms identified in the plant kingdom.

Original publication

DOI

10.1105/tpc.105.033191

Type

Journal article

Journal

Plant Cell

Publication Date

07/2005

Volume

17

Pages

1894 - 1907

Keywords

Arabidopsis, Bryopsida, Cell Differentiation, Cell Nucleus, Chloroplasts, Conserved Sequence, Evolution, Molecular, Gene Expression Regulation, Plant, Genome, Plant, Light-Harvesting Protein Complexes, Magnoliopsida, Molecular Sequence Data, Mutation, Phenotype, Photosynthesis, Sequence Homology, Amino Acid, Sequence Homology, Nucleic Acid, Thylakoids, Transcription Factors