Self-incompatibility: how plants avoid illegitimate offspring.

Self-incompatibility: how plants avoid illegitimate offspring.

In some families of flowering plants, a single self-incompatibility (S) locus prevents the fertilization of flowers by pollen from the same plant. Self-incompatibility of this type involves the interaction of molecules produced by the S locus in pollen with those present in the female tissues (pistil). Until recently, the pistil products of the S locus were known in only two families, the Brass...

Incompatibility in Prescriptions and How to Avoid It

Self-incompatibility: a self-recognition system in plants.

Self-incompatibility (SI), a genetically controlled mechanism to prevent inbreeding in plants, offers a relatively simple model system for studying the interactions between plant cells or between a plant cell and the secreted product or products of another cell. Examples of two major types of SI, gametophytic and sporophytic, have been studied by cloning cDNAs corresponding to glycoproteins of ...

Self-incompatibility systems: barriers to self-fertilization in flowering plants.

Flowering plants (angiosperms) are the most prevalent and evolutionarily advanced group of plants. Success of these plants is owed to several unique evolutionary adaptations that aid in reproduction: the flower, the closed carpel, double fertilization, and the ultimate products of fertilization, seeds enclosed in the fruit. Angiosperms exhibit a vast array of reproductive strategies, including ...

Self-incompatibility: How to Stay Incompatible

Plant self-incompatibility is controlled by different genes for the recognition reactions of pollen and stigmas, yet correct association of the two genes have been maintained in two Brassica species.