© Véronique HUGOUVIEUX / Christine LANCELON-PIN / LPCV / CERMAV / ICMG / CNRS Images

Haut du carpelle d’un mutant d’Arabette des dames



Max. size

13 x 8.62 cm / 300 dpi


Upper part of the carpel on a mutant thale cress (arabidopsis thaliana), observed using scanning electron microscopy at partial water vapour pressure (ESEM mode). Scientists are studying how certain transcription factors, particularly those in the MADS-box gene family (the MADS-box is a motif common to certain transcription factors, taking its name from the first four factors in which it was identified: MCM1, Agamous, Deficiens and SRF), influence the formation of flower organs (sepals, petals, stamens and the carpel), and specifically their cell surface area, which in some organs is highly specific. To this end, they modify plants by introducing certain factors (which may or may not have been mutated) into a specific regions of the SEPALLATA 3 protein and observing the impact on the plants' development. The researchers analyse wild plants and compare them with plants that express the mutated protection in a specific region. Here, they observed that the identity of the cells in the carpel of mutated plants was preserved, but that the two carpels did not fuse.

CNRS Institute(s)

Regional office(s)

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.