● The `color{Brown}"plant growth regulators (PGRs)"` are small, simple molecules of `color{violet}"diverse chemical composition"`.
● They could be `color{violet}"indole compounds"` (indole-3-acetic acid, IAA); `color{violet}"adenine derivatives"` (`N_6`-furfurylamino purine, kinetin), derivatives of `color{violet}"carotenoids"` (abscisic acid, ABA); `color{violet}"terpenes"` (gibberellic acid, GA3) or `color{violet}"gases"` (ethylene, C2H4).
● Plant growth regulators are variously described as `color{violet}"plant growth substances"`, `color{violet}"plant hormones"` or `color{violet}"phytohormones"` in literature.
● The PGRs can be broadly divided into `color{violet}"two groups"` based on their functions in a `color{violet}"living plant body"`.
● One group of PGRs are involved in `color{violet}"growth promoting activities"`, such as cell division, cell enlargement, pattern
formation, tropic growth, flowering, fruiting and seed formation.
● These are also called `color{violet}"plant growth promoters"`, e.g., auxins, gibberellins and cytokinins.
● The PGRs of the other group play an important role in `color{violet}"plant responses to wounds"` and `color{violet}"stresses of biotic and abiotic"` origin.
● They are also involved in various `color{violet}"growth inhibiting activities"` such as dormancy and abscission.
● The PGR `color{violet}"abscisic acid"` belongs to this group.
● The `color{violet}"gaseous PGR, ethylene"`, could fit either of the groups, but it is largely `color{violet}"an inhibitor"` of growth activities.
● The `color{Brown}"plant growth regulators (PGRs)"` are small, simple molecules of `color{violet}"diverse chemical composition"`.
● They could be `color{violet}"indole compounds"` (indole-3-acetic acid, IAA); `color{violet}"adenine derivatives"` (`N_6`-furfurylamino purine, kinetin), derivatives of `color{violet}"carotenoids"` (abscisic acid, ABA); `color{violet}"terpenes"` (gibberellic acid, GA3) or `color{violet}"gases"` (ethylene, C2H4).
● Plant growth regulators are variously described as `color{violet}"plant growth substances"`, `color{violet}"plant hormones"` or `color{violet}"phytohormones"` in literature.
● The PGRs can be broadly divided into `color{violet}"two groups"` based on their functions in a `color{violet}"living plant body"`.
● One group of PGRs are involved in `color{violet}"growth promoting activities"`, such as cell division, cell enlargement, pattern
formation, tropic growth, flowering, fruiting and seed formation.
● These are also called `color{violet}"plant growth promoters"`, e.g., auxins, gibberellins and cytokinins.
● The PGRs of the other group play an important role in `color{violet}"plant responses to wounds"` and `color{violet}"stresses of biotic and abiotic"` origin.
● They are also involved in various `color{violet}"growth inhibiting activities"` such as dormancy and abscission.
● The PGR `color{violet}"abscisic acid"` belongs to this group.
● The `color{violet}"gaseous PGR, ethylene"`, could fit either of the groups, but it is largely `color{violet}"an inhibitor"` of growth activities.