A ligand-independent origin of abscisic acid perception
Yufei Sun(Hebrew University of Jerusalem), Ben Harpazi(Hebrew University of Jerusalem), Akila Wijerathna‐Yapa(Hebrew University of Jerusalem), Ebe Merilo(University of Tartu), Jan de Vries(University of Göttingen), Daphna Michaeli(Hebrew University of Jerusalem), Maayan Gal(Tel Aviv University), Andrew C. Cuming(University of Leeds), Hannes Kollist(University of Tartu), Assaf Mosquna(Hebrew University of Jerusalem)
Cited by 139Open Access
Abstract
has basal, ligand-independent activity of PP2C repression, suggesting this to be an ancestral function. Similarly, a liverwort receptor possesses basal activity, but it is further activated by ABA. We propose that co-option of ABA to control a preexisting PP2C-SnRK2-dependent desiccation-tolerance pathway enabled transition from an all-or-nothing survival strategy to a hormone-modulated, competitive strategy by enabling continued growth of anatomically diversifying vascular plants in dehydrative conditions, enabling them to exploit their new environment more efficiently.
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