The influence of the pollination compatibility type on the pistil expression in European pear ().

The gene plays an essential role in the gametophytic self-incompatibility (GSI) system of . It codes for the stylar-expressed S-RNase protein which inhibits the growth of incompatible pollen tubes through cytotoxicity and the induction of programmed cell death in the pollen tube. While research on the GSI system has primarily focused on the gene, there is still a lack of insight into its spatiotemporal expression profile and the factors that regulate it.

A semi in vivo pollination technique to assess the level of gametophytic self-incompatibility and pollen tube growth in pear (Pyrus communis L.).

We describe a semi in vivo pollination technique to determine the compatibility relation between different pear cultivars. This assay provides a valuable addition to existing tools in GSI research. The gametophytic self-incompatibility (GSI) system in Pyrus inhibits fertilization by pollen that shares one of the two S-alleles of the style.

Finding a Compatible Partner: Self-Incompatibility in European Pear (); Molecular Control, Genetic Determination, and Impact on Fertilization and Fruit Set.

species display a gametophytic self-incompatibility (GSI) system that actively prevents fertilization by self-pollen. The GSI mechanism in is genetically controlled by a single locus, i.e.