abscisinn.
/əbˈsɪsɪn/, /abˈsɪsɪn/, U.S. /æbˈsɪsɪn/ Biochemistry.
Either of two substances that promote leaf abscission, (a) (more fully abscisin I) one isolated from cotton bolls (now historical); (b) (more fully abscisin II) = abscisic acid n. at abscisic adj.
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the world > life > biology > substance > process stimulators or inhibitors > hormone > [noun] > in plants
hormone1911
wound hormone1921
plant hormone1932
phytohormone1933
auxin1934
heteroauxin1935
florigen1936
traumatic acid1939
abscisin1961
zeatin1963
cytokinin1965
antheridiol1967
abscisic acid1968
oogoniol1975
1961 W.-C. Liu & H. R. Carns in Science 11 Aug. 384/2 A crystalline substance, designated abscisin, which accelerates abscission of excised debladed petioles,..has been isolated from cotton burs.
1963 K. Ohkuma et al. in Science 20 Dec. 1592 Crystalline abscisin II, with a tentative molecular formula of C15H20O4, has been isolated from young cotton fruit.
1963 K. Ohkuma et al. in Science 20 Dec. 1593/2 These data show that abscisin II is chemically distinct from abscisin I.
1968 New Scientist 25 Jan. 187/1 Plant hormones such as..auxin, gibberellin, and abscisin have special roles in controlling growth.
1972 T. W. Goodwin & E. I. Mercer Introd. Plant Biochem. xv. 328 Abscisic acid,..also previously known as abscisin II and dormin,..is now known to be widely if not ubiquitously distributed in plants.
1996 R. N. Arteca Plant Growth Substances i. 9 The structure of this compound, which was called abscisin I was never determined.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online December 2021).
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n.1961