The Diversity of Self‐Incompatibility Systems in Flowering Plants
- 1 January 2003
- journal article
- Published by Wiley in Plant Biology
- Vol. 5 (1) , 23-32
- https://doi.org/10.1055/s-2003-37981
Abstract
Flowering plants are the most successful group of land plants and dominate the earth's vegetation with around 300 000 species. This success is, in part, the consequence of a set of unique reproductive innovations that evolved with the flower. Most notable of these innovations were the closed carpel and double fertilization. Closed carpels permitted the evolution of effective mechanisms for pollen selection and discrimination, while double fertilization leading to endosperm formation allowed for more efficient utilization of resources because reserves are only allocated to the seed after fertilization. This review will focus on the most important and best understood mechanism of pollen discrimination, self‐incompatibility (SI), a genetically determined pollen recognition system that prevents self‐fertilization and fertilization by other individuals with the same incompatibility phenotype. In recent years much progress has been made towards elucidating the molecular mechanisms of SI operating in three distinct SI systems found in the Brassicaceae, Solanaceae and Papaveraceae, respectively. More recent molecular data obtained from the Poaceae, Convolvulaceae and Asteraceae, however, suggest that other molecular mechanisms of SI exist. A survey of classical genetic studies of SI predicts yet further potential molecular mechanisms of SI. We discuss the evolutionary implications of this apparent diversity in molecular pathways leading to SI and stress the need for more molecular studies of different SI systems.Keywords
This publication has 85 references indexed in Scilit:
- STUDIES ON SELF-STERILITY IN RYE, SECALE CEREALE LHereditas, 2010
- Highly divergent sequences of the pollen self‐incompatibility (S) gene in class‐I S haplotypes of Brassica campestris (syn. rapa) LFEBS Letters, 2000
- Pollen-expressed S-RNases are not involved in self-incompatibility in Lycopersicon peruvianumSexual Plant Reproduction, 1999
- Identification and cloning of related self-incompatibility S -genes in Papaver rhoeas and Papaver nudicauleSexual Plant Reproduction, 1998
- Ca 2+ ‐independent phosphorylation of a 68 kDa pollen protein is stimulated by the self‐incompatibility response in Papaver rhoeasThe Plant Journal, 1997
- Cloning a putative self-incompatibility gene from the pollen of the grass Phalaris coerulescens.Plant Cell, 1994
- The self‐incompatibility response in Papaver rhoeas is mediated by cytosolic free calciumThe Plant Journal, 1993
- An in vitro bioassay for the stigmatic product of the self‐incompatibility gene in Papaver rhoeas L.New Phytologist, 1988
- Genetic versatility of incompatibilty in plantsNew Zealand Journal of Botany, 1979
- The biology of heterostylyNew Zealand Journal of Botany, 1979