ABSCISIC ACID (ABA) A Seed Maturation and Antistress Signal (Naturally occurring, active form)(Inactive in stomatal closure) (Inactive, but interconvertible with active [cis] form))

PHYSIOLOGICAL EFFECTS OF ABA  ABA PROMOTES DESSICATION TOLERANCE IN THE EMBRYO.  ABA PROMOTES ACCUMULATION OF SEED STORAGE PROTEIN DURING EMBRYOGENESIS.  THE ABA/GA RATIO REGULATES SEED DORMANCY.  ABA HELPS SUPPRESS GROWTH OF DORMANT BUDS.  ABA INHIBITS GA-INDUCED ENZYME PRODUCTION IN CERAL ALEURONE LAYERS.  ABA CLOSES STOMATA  ABA PROMOTES LEAF SENESCENCE

BIOSYNTHESIS OF ABA

SYNTHESIS AND METABOLISM OF ABA ABA-Aldehyde

PRECOCIOUS GERMINATION IN ABA-DEFICIENT MAIZE MUTANT vp14

ABA FROM ROOTS TRANSPORTED TO SHOOTS VIA THE XYLEM

WATER STRESS INCREASES ABA AND STOMATAL RESISTANCE LEAVES

ABA INCREASES THE ROOT:SHOOT RATIO DURING WATER STRESS IN MAIZE

USE OF CAGED ABA TO STUDY SITE OF ACTION CAGED ABA CAN BE MICROINJECTED IN GUARD CELLS, THEN RELEASED WITH A PULSE OF UV IRRADIATION.

DEMONSTRATION THAT ABA BINDS INTRACELLULARLY

ABA CAUSES MEMBRAANE DEPOLARIZATIONS WHICH CORRELATE WITH RISES IN INTRACELLULAR CALCIUM

ABA-INDUCED CALCIUM OSCILLATIONS PSEUDO COLORED IMAGES OF YELLOW CAMELEON FLUORESCENCE

ABA INHIBITS LIGHT-INDUCED PROTON PUMPING BY GUARD CELL PROTOPLASTS