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Université de Fribourg

Insect eggs suppress plant defence against chewing herbivores

Bruessow, Friederike ; Gouhier-Darimont, Caroline ; Buchala, Antony J. ; Metraux, Jean-Pierre ; Reymond, Philippe

In: The Plant Journal, 2010, vol. 62, no. 5, p. 876 - 885

Plants activate direct and indirect defences in response to insect egg deposition. However, whether eggs can manipulate plant defence is unknown. In Arabidopsis thaliana, oviposition by the butterfly Pieris brassicae triggers cellular and molecular changes that are similar to the changes caused by biotrophic pathogens. In the present study, we found that the plant defence signal salicylic acid...

Université de Fribourg

Phytochrome signalling modulates the SA-perceptive pathway in Arabidopsis

Genoud, Thierry ; Buchala, Antony J. ; Chua, Nam-Hai ; Métraux, Jean-Pierre

In: The Plant Journal, 2002, vol. 31(1), p. 87

The interaction of phytochrome signalling with the SA signal transduction pathway has been investigated in Arabidopsis using single and multiple mutants affected in light perception (phyA and phyB deficient) and light-signal processing (psi2, phytochrome signalling). The induction of PR1 by SA and functional analogues has been found to strictly correlate with the activity of...