1. Bud dormancy:
Experimental results of Wareing et al (1965) have clearly revealed the inhibitor role of ABA in leaves and buds. Application of ABA to non dormant buds causes dormancy in Betula, Acer etc.
2. Senescence:
ABA encourages leaf senescence in vitro. Whether endogenous AGA performs the same function in vivo is not yet proved.
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3. Abscission:
Observations of Frederic Addicott (1964) have revealed that ABA is responsible for abscission in cotton fruits.
4. Flowering:
ABA induced flowering during long days has been noticed several short day plants such as Ribes, Phorbitis, Fragaria etc. But this influence is not universal as reported by its (ABA) failure to initiate flowering in a typical short day plant such as Xanthium.
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5. Stomatal functioning:
Membrane functioning is altered by influencing the rapid loss of K+ ions from guard cells.
6. Release of Ethylene:
ABA influences the release of ethylene and causes senescence.
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7. Inhibition of other hormones:
ABA counteracts the influence of GA and possibly IAA also. Hydrolase production influenced by GA is inhibited by ABA.