THE POLLEN-STIGMA INTERACTION: BUD POLLINATION IN THE CRUCIFERAE

• DOI: 10.1111/j.1438-8677.1978.tb00265.x
• Publication Date: 2015-04-22T11:24:25Z
• Authors: K. R. Shivanna; Y. Heslop-Harrison; J. Heslop-Harrison
• Keywords: Stigma; Raphanus

The stigmas of buds the age range capable accepting self-pollen (bud pollination) in self incompatible individuals Raphanus sativus and Cheiranthus cheiri were found to have cuticularised papillae already carrying a thin surface secretion over receptive area. Enzymatic digestion proteinaceous part this reduced germination rate both compatible pollen prevented tubes that formed from penetrating cuticle papillae, so abolishing compatibility. This indicates an stigma factors concerned with self-incompatibility response not yet accumulated quantities sufficient inhibit tube growth, although those involved promoting facilitating entry are present. behaviour Cruciferae which do accept self-pollination any age, such as variety Sinapis alba tested, may be explained on assumption penetration secreted simultaneously incompatibility there is no period when free inhibitions imposed by system stigma.