BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Abstract. Abscisic acid (ABA) is a plant hormone that regulates numerous aspects of plant growth, development, and stress responses. ABA-deficient mutants from various plant species display reduced seed dormancy and wilty phenotypes, highlighting that these crucial ABA functions are conserved in the plant kingdom.

Detailed explanation-2: -Abscisic acid is also known as the stress hormone because it is found to induce various types of responses in plants against stress conditions like the closure of the stomata during drought, seed dormancy and it also ensures germination of seed during favorable conditions.

Detailed explanation-3: -Abscisic acid (ABA) is a single 15-C sequiterpenoid hormone that was originally isolated from abscising cotton fruits and maple dormant buds; the (+)-cis ABA enantiomer is the naturally active form found in plants.

Detailed explanation-4: -Abscisic acid (ABA) is an effective inhibitor of cell elongation in excised embryonic bean axes whether added prior to or after the initiation of cell elongation. Zeatin partially reverses this growth inhibition.