Here's why:
* Complex Interactions: Plant hormones (PGRs) often work in concert with each other, creating a complex network of interactions. This means that the effect of one PGR can be influenced by the presence of others.
* Context-Dependent Effects: The effect of a PGR can also vary depending on the tissue, developmental stage, and environmental conditions. For example, auxin can promote root growth in some cases but inhibit it in others.
* Multiple Targets: PGRs often have multiple targets within the cell, leading to a wide range of effects. They can influence gene expression, enzyme activity, cell division, elongation, differentiation, and more.
Therefore, while PGRs can be associated with specific functions (e.g., auxin and root growth), it's important to understand that their roles are often nuanced and context-dependent.
It's more accurate to say that PGRs influence cellular processes and developmental events rather than directly controlling them.
