BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Gibberellins stimulate cell elongation by altering the rheological properties of the cell wall; as a consequence, the water potential of the cell is lowered allowing for water uptake and therefore an increase in cell volume.

Detailed explanation-2: -Gibberellins are plant growth regulators that facilitate cell elongation, help the plants to grow taller. They also play major roles in germination, elongation of the stem, fruit ripening and flowering.

Detailed explanation-3: -Gibberellins promote flowering of arabidopsis by activating the LEAFY promoter. Plant Cell.

Detailed explanation-4: -Physiological studies and phenotypic characterization of mutants impaired GA biosynthesis. It revealed that GA plays an important role in stem or internode elongation. It stimulates cell division and expansion in response to light or dark.

Detailed explanation-5: -Auxin causes the elongation of stem and coleoptile cells by promoting wall loosening via cleavage of these bonds. This process may be coupled with the intercalation of new cell wall polymers.