Molecular aspects of self-incompatibility in Brassica species.
Many flowering plants possess self-incompatibility (SI) systems to prevent inbreeding. SI in Brassica species is controlled by a single S locus with multiple alleles. In recent years, much progress has been made in determining the male and female S determinant in Brassica species. In the female, a gain-of-function experiment clearly demonstrated that SRK was the sole S determinant, and that SLG enhanced the SI recognition process. By contrast, the male S determinant (termed SP11/SCR) was identified in the course of genome analysis of S locus to be a small cysteine-rich protein, which was classified as a pollen coat protein. This SP11/SCR may function as a ligand for the S domain of SRK in the SI recognition reaction of Brassica species.
Watanabe
M
M
Laboratory of Plant Breeding, Faculty of Agriculture, Iwate University, Morioka, 020-8550 Japan. nabe@iwate-u.ac.jp
Hatakeyama
K
K
Takada
Y
Y
Hinata
K
K
D001937:Brassica / Q000235:genetics / Q000502:physiology; D019143:Evolution, Molecular; D017343:Genes, Plant; D006023:Glycoproteins / Q000235:genetics / Q000502:physiology*; D010940:Plant Proteins / Q000235:genetics / Q000502:physiology*; D011494:Protein Kinases / Q000235:genetics / Q000502:physiology*
D006023:Glycoproteins; D010940:Plant Proteins; C431526:SP11 protein, Brassica; C064156:self-incompatibility locus specific glycoprotein, Brassica; D011494:Protein Kinases; C079832:S-receptor kinase