Plant Science

Prohormone processing by subtilases

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Science  23 Dec 2016:
Vol. 354, Issue 6319, pp. 1546-1547
DOI: 10.1126/science.354.6319.1546-g

A flower that has gone to seed will drop its petals in a regulated process called abscission. Schardon et al. analyzed the production of the peptide hormone that regulates floral organ abscission in the model plant Arabidopsis thaliana. They used tissue-specific expression of proteinase inhibitors to identify the subtilisin-like proteinases that act as prohormone convertases required for peptide hormone production in plants.

Science, this issue p. 1594

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