Abscisic Acid: A New Name for Abscisin II (Dormin)

Abstract

Slatis has raised a single valid point. The chromosome-per-cell distributions displayed in our put numbers on our observations. We do recognize the implications of such damage in our experimental cell populations, if the observations were significantly elevated above control values. We cannot say that they were, or that they were not.We feel that Slatis' attempt to show chromosome damage by pointing to differences which are the result of random sampling error is not a matter of a one-tailed or a two-tailed test.We agree that the pertinent statistical tests, at least for data in our Table 2, should be one-tailed. In fact, our conclusions were based on one-tailed ttests, the full results of which were not tabulated. The confidence limits given with our data were for the convenience of readers who wished to inform themselves of the magnitude of random sampling errors associated with the percentages in the Abscisic Acid: A New Name for Abscisin II (Dormin) Abscisin II was the name given to the second of two abscission-accelerating substances isolated (1) from cotton fruit. The same substance was subsequently isolated (2) from sycamore leaves as the result of a search for a "dormin" [an endogenous substance inducing dormancy (3)]. Since then, the substance has been identified in a large number of higher plants. The structure of abscisin II has been determined and confirmed by synthesis (4); structure and correct absolute configuration (5) are shown by the insert.

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

“…Later, an isolated compound from the leaves of birch and maple trees, now known as dormin, was revealed to trigger a resting state in the trees buds [53]. In 1967, abscisin and dormin were combined with the unique name of abscisic acid (ABA) [54]. Structural formula of ABA, a sesquiterpene (C15), is presented in Figure 2.…”

The role of abscisic acid in plant tissue culture: a review of recent progress

“…During this same period, Cornforth et al (1965) were successful in isolating a compound from sycamore leaves, denoted dormin, that proved to be involved in bud dormancy. A comparative analysis of the chemical structures of these two compounds by infrared spectroscopy revealed that they were one and the same compound (Addicott et al 1968) and, following its purification and determination of its chemical structure, this compound was renamed abscisic acid (ABA). Subsequent studies revealed that the ABA level increases considerably when plants wilt (Wright and Hiron 1969) and that ABA causes stomatal closure (Mittelheuser and Van Steveninck 1969).…”

Plant Hormone Perception at the Plasma Membrane

“…ABA was discovered in the early 1960s by different groups studying abscission in cotton and lupine fruits, and bud dormancy in woody plants (Addicott et al 1968). Since then, the roles of ABA have become obvious in both physiological and adaptive responses of plants (Christmann et al 2006).…”