α-amylase induction and stomatal opening in spiderwort epidermal strip bioassays. (1′S)-(+)-1′-Deoxy-1′-fluoroabscisic acid showed 110 to 120 of the activity of (1′S)-(+)-ABA and was almost equal to (1′R)-(+)-1′-deoxyabscisic acid in these assays. These results suggest that the fluorine atom cannot mimic the C-1′ hydroxyl group. (1′R,6′S)-(+)-8′-fluoroabscisis acid was as effective as (+)-ABA, and the effect
脱落酸 (ABA) 的解析类似物在
水稻幼苗伸长、生菜种子发芽、大麦
α-淀粉酶诱导和
叶黄素表皮条
生物测定中的气孔开放中进行了测试。(1'S)-(+)-1'-Deoxy-1'-fluoroabscisic acid 的活性为 (1'S)-(+)-ABA 的 110 至 120,几乎与 (1'R)- 相当(+)-1'-脱氧
脱落酸在这些测定中。这些结果表明
氟原子不能模拟 C-1' 羟基。(1'R,6'S)-(+)-8'-
氟脱落酸与(+)-ABA一样有效,对受试植物的影响与(+)-ABA没有区别。该结果表明高度不稳定的 8'-羟基
脱落酸的活性与 (+)-ABA 的活性一样强。(-)-对映异构体的活性等于或小于(-)-ABA的活性。