Style antigens of Prunus avium L

Area of Science:

• Plant reproductive biology
• Immunochemistry
• Plant breeding

Background:

• Understanding style proteins is crucial for plant reproductive success and breeding strategies.
• Previous research has not fully characterized the specific antigens present in *P. avium* styles.

Purpose of the Study:

• To identify and characterize major antigenic components in mature *P. avium* cv. Lambert styles.
• To investigate the association of these antigens with specific S-genotypes and their distribution across species.

Main Methods:

• Antiserum was generated in rabbits against a protein fraction from *P. avium* cv. Lambert styles.
• Immunoelectrophoresis and immunodiffusion techniques were employed to detect antigenic components.
• Charge properties of antigens were determined at pH 8.8.

Main Results:

• Two major antigenic components, S-antigen and P-antigen, were identified in style extracts.
• The S-antigen was found to be specific to the S 3 S 4 genotype and present only in mature *P. avium* styles.
• The P-antigen was detected in styles of all examined *Prunus* species but not in other *Rosaceae* species, indicating it is positively charged at pH 8.8, while P-antigen is negatively charged.

Conclusions:

• Specific S-antigens can serve as molecular markers for particular S-genotypes in *P. avium*.
• The P-antigen is a conserved marker for the *Prunus* genus, useful for taxonomic and identification purposes.
• These findings contribute to the understanding of pollen-stigma interactions and facilitate breeding programs.