Journal article
Inclusions of flavonoid 3-deoxyanthocyanidins in Sorghum bicolor self-organize into spherical structures
Plant Biochemistry Laboratory, Department of Plant Biology, The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Denmark1
Carlsberg Laboratory, Department of Physiology, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark2
Carlsberg Laboratory, Department of Chemistry, Gamle Carlsberg Vej 10, DK-2500 Valby, Denmark3
Plant Physiology and Anatomy Laboratory, Department of Plant Biology, The Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, DK-1871 Frederiksberg C, Denmark4
Risø National Laboratory, Plant Research Department, Frederiksborgvej 399, P.O. Box 49, DK-4000 Roskilde, Denmark5
Department of Plant Physiology, Institute of Molecular Biology, University of Copenhagen, Øster Farimagsgade 2A, DK-1353 Copenhagen K, Denmark6
Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907, USA7
Danish Epilepsy Centre, Laboratory, 11 Kolonivej, DK-4293 Dianalund, Denmark8
Sorghum (Sorghum bicolor L.) produces 3-deoxyanthocyanidin phytoalexins. They accumulate as inclusions in cells and inhibit infection in a site-specific response. Inclusions are self-organizing 3-deoxyanthocyanidins. In aqueous solution, protons and acetate counter-ions condition self-stacking. Non-vesicular cytoplasmic trafficking of inclusions to sites of ingress is discussed.
It is suggested that re-arrangements in plant cells under attack direct accumulation of inclusions to penetration sites. Nuclear migration, cytoplasmic streaming and intracellular pH provide an environment for inclusion trafficking and release of the phytoalexins. Luteolinidin, when self-organized as pigmented inclusions, mediates disruption of plant and fungal plasma membranes as well as reconstructed bilayer liposomes.
| Language: | English |
|---|---|
| Year: | 2005 |
| Pages: | 187-196 |
| ISSN: | 10961178 and 08855765 |
| Types: | Journal article |
| DOI: | 10.1016/j.pmpp.2005.02.001 |
