Synthesis and biological activity of abscisic acid esters |
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Institution: | 1. Biological Oceanography Division, CSIR- National Institute of Oceanography, Dona Paula, Goa, 403004, India;2. CSIR, National Institute of Oceanography, Regional Centre, PB 1913, Cochin, Kerala, 682018, India |
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Abstract: | 16 ABA esters including 11 new compounds were prepared by two different esterification routes. All the structures of ABA esters were confirmed by 1H NMR, 13C NMR and HRMS. Their biological activity and hydrolysis stability were investigated. Fortunately, there were 15 and 9 compounds which displayed much better or nearly the same inhibition activity for rice seedling growth and Arabidopsis thaliana seed germination compared to ABA, respectively. Especially, compounds 2d and 2g showed better biological activities than ABA in the three tests. Moreover, we found that chemical hydrolysis ability of the esters in vitro had little relationship to their biological activity. |
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Keywords: | Abscisic acid Abscisic acid ester Biological activity |
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