Abbreviation for abscisic acid; see there.
A phytohormone (abbreviation ABA, outdated Dormin) discovered in the 1950s, which has a growth-regulating effect in plants in interaction with auxins, cytokinins and gibberellins. This substance cancels the effect of growth-promoting hormones and causes, among other things, bud dormancy in already lignified perennial plants. In vines, it is involved in leaf fall, shoot...
There is a vast number of sources on the web where one can acquire knowledge about wine. But none has the scope, timeliness and accuracy of the information in the encyclopaedia at wein.plus. I use it regularly and rely on it.
Sigi Hiss
freier Autor und Weinberater (Fine, Vinum u.a.), Bad Krozingen