20170133_0005

© Lucie RIGLET / RDP / CNRS Images

Reference

20170133_0005

Pollinisation incompatible d’une Arabette des dames

Incompatible attempted pollination of thale cress (arabidopsis thaliana), observed using scanning electron micrsoscopy. Here, the surface of the female reproducitve organ, the stigma, formed of elongated cells, the stigmatic papillae, rejects all pollen grains. The plant will not be fertilised. Despite encountering hundreds of grains of pollen, the female reproductive organs of plants are able to choose their male partners very quickly. In the case of brassicas (the group that includes cabbages, radishes, rockcress, etc.), this choice depends on a lock-and-key type interaction, the key (a peptide) being introduced by the pollen whereas the lock (a membrane-associated kinase receptor) is present on the plasma membrane of the stigma cells. If the key and the lock are genetically related (being brother and sister, for example), the lock-and-key interaction prompts the stigma to reject the pollen. This mechanism enables the plant to avoid inbreeding.

CNRS Institute(s)

Regional office(s)

Scientific topics

CNRS Images,

Our work is guided by the way scientists question the world around them and we translate their research into images to help people to understand the world better and to awaken their curiosity and wonderment.