Rolli E, Incerti M, Brunoni F, Vicini P, Ricci A. Structure-activity relationships of N-phenyl-N'-benzothiazol-6-ylurea synthetic derivatives: cytokinin-like activity and adventitious rooting enhancement.
PHYTOCHEMISTRY 2012;
74:159-165. [PMID:
22115176 DOI:
10.1016/j.phytochem.2011.10.012]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/23/2011] [Accepted: 10/26/2011] [Indexed: 05/31/2023]
Abstract
Some years ago we demonstrated the cytokinin-like activity of the synthetic N-phenyl-N'-benzothiazol-6-ylurea (PBU) and a relevant adventitious rooting adjuvant activity of symmetric urea derivatives devoid of any cytokinin- or auxin-like activity per se. Here we report the synthesis and the biological activity evaluation of nine symmetric or asymmetric ureas/thioureas, structurally related to PBU. None of them show cytokinin-like activity, while we demonstrate for the first time that PBU interacts with Arabidopsis cytokinin receptor CRE1/AHK4 in a heterologous bioassay system. Among the PBU derivatives, all the symmetric ureas/thioureas show an adventitious rooting adjuvant activity in various bioassays, confirming that this activity is strictly dependent on their chemical structure.
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