General
ABA is a growth _____.
inhibitor
Name one role ABA places in plants.
Acceptable Answers Include: promotes seed dormancy, promotes bud dormancy, controls stress responses, accelerates leaf abscission, promotes flowering and maturation, inhibits leaf and stem growth
Would ABA inhibit growth of a seed during the dry season?
yes; the dry season causes stress on the seed
This tropism, influenced by ABA, is when a plant's roots grow downwards with gravity.
Geotropism
Most ABA products are applied using this method.
Spray
When the the stomata of a plant close, ABA was released because the plant detected this.
low moisture levels
Does ABA inhibit or promote stem compression?
Promote!
Is the following an approved use of commercially available products containing ABA: application on woody ornamentals?
Yes
The first commercial ABA product was released under this name.
ProTone SL.
one of the roles ABA plays in plants can be defined as "initiating a period of inactivity of the bud to withstand stressful conditions." Define this role of ABA.
promoting bud dormancy
Would ABA inhibit flowering during a sunny and warm Spring day?
No; no stress to respond to
What country is the world's largest grape producer?
Chile
A common stress response ABA is involved in is the closure of this part when a plant's roots notice low moisture levels.
Stomata
Name where ABA is mainly produced within the plant
the roots!
If a plant is in an environment with humidity levels of 80%, are ABA levels increased or decreased?
Increased; non suitable environment
ABA influences this tropism which is when the roots grow towards H2O.
hydrotropism
Of the two naturally occurring forms of ABA listed in the presentation [S-(+)-ABA and R-(-)-ABA], one was active and one was inactive. Which one was active? Which one was inactive?
S-(+)-ABA - INACTIVE
-(-)-ABA - ACTIVE
This role of ABA affects a plant's height.
inhibiting leaf and stem growth
A grape is not fully colored and begins to change colors over the coming days. Were ABA levels increased or decreased?
Increased; ABA promotes maturation, which includes enhanced coloration in fruits.
Name a PGR that has a reverse effect of ABA.
Acceptable Answers Include: gibberellins, cytokinins