● `color{Brown}"Abscisic acid (ABA)"` was discovered for its role in `color{violet}"regulating abscission and dormancy"`.
● But like other PGRs, it also has other `color{violet}"wide ranging effects"` on plant growth and development.
● It acts as a general `color{violet}"plant growth inhibitor"` and an `color{violet}"inhibitor of plant metabolism"`.
● ABA `color{violet}"inhibits seed germination"`.
● ABA stimulates the `color{violet}"closure of stomata"` in the epidermis and increases the tolerance of plants to `color{violet}"various kinds of stresses"`.
● Therefore, it is also called the `color{violet}"stress hormone"`.
● ABA plays an important role in `color{violet}"seed development, maturation"` and `color{violet}"dormancy"`.
● By inducing dormancy, ABA helps seeds to `color{violet}"withstand desiccation"` and other factors `color{violet}"unfavourable for growth"`.
● In most situations, ABA acts as an `color{violet}"antagonist to GAs"`.
● For any and every phase of `color{violet}"growth, differentiation"` and `color{violet}"development of plants"`, one or the other PGR has some role to play.
● Such roles could be `color{violet}"complimentary or antagonistic"`.
● These could be `color{violet}"individualistic or synergistic"`.
● Similarly, there are a `color{violet}"number of events"` in the life of a plant where more than one `color{violet}"PGR interact"` to affect that event, e.g., `color{violet}"dormancy in seeds"`/`color{violet}" buds, abscission, senescence"`, `color{violet}"apical dominance"`, etc.
● The role of PGR is of only one kind of `color{violet}"intrinsic control"`.
● Along with `color{violet}"genomic control"` and `color{violet}"extrinsic factors,"` they play an important role in plant growth and development.
● Many of the extrinsic factors such as `color{violet}"temperature and light"`, control plant growth and development via PGR.
● Some of such events could be: `color{violet}"vernalisation, flowering"`, `color{violet}"dormancy, seed germination"`, `color{violet}"plant movements"`, etc.
● `color{Brown}"Abscisic acid (ABA)"` was discovered for its role in `color{violet}"regulating abscission and dormancy"`.
● But like other PGRs, it also has other `color{violet}"wide ranging effects"` on plant growth and development.
● It acts as a general `color{violet}"plant growth inhibitor"` and an `color{violet}"inhibitor of plant metabolism"`.
● ABA `color{violet}"inhibits seed germination"`.
● ABA stimulates the `color{violet}"closure of stomata"` in the epidermis and increases the tolerance of plants to `color{violet}"various kinds of stresses"`.
● Therefore, it is also called the `color{violet}"stress hormone"`.
● ABA plays an important role in `color{violet}"seed development, maturation"` and `color{violet}"dormancy"`.
● By inducing dormancy, ABA helps seeds to `color{violet}"withstand desiccation"` and other factors `color{violet}"unfavourable for growth"`.
● In most situations, ABA acts as an `color{violet}"antagonist to GAs"`.
● For any and every phase of `color{violet}"growth, differentiation"` and `color{violet}"development of plants"`, one or the other PGR has some role to play.
● Such roles could be `color{violet}"complimentary or antagonistic"`.
● These could be `color{violet}"individualistic or synergistic"`.
● Similarly, there are a `color{violet}"number of events"` in the life of a plant where more than one `color{violet}"PGR interact"` to affect that event, e.g., `color{violet}"dormancy in seeds"`/`color{violet}" buds, abscission, senescence"`, `color{violet}"apical dominance"`, etc.
● The role of PGR is of only one kind of `color{violet}"intrinsic control"`.
● Along with `color{violet}"genomic control"` and `color{violet}"extrinsic factors,"` they play an important role in plant growth and development.
● Many of the extrinsic factors such as `color{violet}"temperature and light"`, control plant growth and development via PGR.
● Some of such events could be: `color{violet}"vernalisation, flowering"`, `color{violet}"dormancy, seed germination"`, `color{violet}"plant movements"`, etc.