Ectopic expression of a self-incompatibility module triggers growth arrest and cell death in vegetative cells

Zongcheng Lin, Fei Xie, Marina Munoz Trivino, Mansour Karimi, Maurice Bosch, Vernonica E. Franklin-Tong, Moritz Nowack

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

13 Dyfyniadau(SciVal)
127 Wedi eu Llwytho i Lawr (Pure)


Self-incompatibility (SI) is used by many angiosperms to reject self-pollen and avoid inbreeding. In field poppy (Papaver rhoeas), SI recognition and rejection of self-pollen is facilitated by a female S-determinant, PrsS, and a male S-determinant, PrpS. PrsS belongs to the cysteine-rich peptide family, whose members activate diverse signaling networks involved in plant growth, defense, and reproduction. PrsS and PrpS are tightly regulated and expressed solely in pistil and pollen cells, respectively. Interaction of cognate PrsS and PrpS triggers pollen tube growth inhibition and programmed cell death (PCD) of self-pollen. We previously demonstrated functional intergeneric transfer of PrpS and PrsS to Arabidopsis (Arabidopsis thaliana) pollen and pistil. Here, we show that PrpS and PrsS, when expressed ectopically, act as a bipartite module to trigger a self-recognition:self-destruct response in Arabidopsis independently of its reproductive context in vegetative cells. The addition of recombinant PrsS to seedling roots expressing the cognate PrpS resulted in hallmark features of the P. rhoeas SI response, including S-specific growth inhibition and PCD of root cells. Moreover, inducible expression of PrsS in PrpS-expressing seedlings resulted in rapid death of the entire seedling. This demonstrates that, besides specifying SI, the bipartite PrpS-PrsS module can trigger growth arrest and cell death in vegetative cells. Heterologous, ectopic expression of a plant bipartite signaling module in plants has not been shown previously and, by extrapolation, our findings suggest that cysteine-rich peptides diversified for a variety of specialized functions, including the regulation of growth and PCD.

Iaith wreiddiolSaesneg
Tudalennau (o-i)1765-1779
Nifer y tudalennau15
CyfnodolynPlant Physiology
Rhif cyhoeddi4
Dyddiad ar-lein cynnar19 Meh 2020
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Awst 2020

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