● `color{Auxins}"Auxins"` (from Greek ‘auxein’ : to grow) was first isolated from `color{violet}"human urine"`.
● The term ‘auxin’ is applied to the `color{violet}"indole-3-acetic acid (IAA)"`, and to other natural and synthetic compounds having certain `color{violet}"growth regulating properties"`.
● They are generally produced by the `color{violet}"growing apices"` of the stems and roots, from where they `color{violet}"migrate to the regions"` of their action.
● Auxins like `color{violet}"IAA and indole butyric acid (IBA)"` have been isolated from plants.
● `color{violet}"NAA (naphthalene acetic acid)"` and `color{violet}"2, 4-D (2, 4-dichlorophenoxyacetic)"` are synthetic auxins.
● All these auxins have been used extensively in `color{violet}"agricultural and horticultural practices."`
● They help to `color{violet}"initiate rooting"` in stem cuttings, an application widely used for `color{violet}"plant propagation"`.
● Auxins `color{violet}"promote flowering"` e.g. in pineapples.
● They help to `color{violet}"prevent fruit and leaf drop"` at early stages but promote the `color{violet}"abscission"` of older mature leaves and fruits.
● In most higher plants, the `color{violet}"growing apical bud"` inhibits the growth of the lateral (axillary) buds, a phenomenon called `color{Brown}"apical dominance"`.
● `color{violet}"Removal of shoot tips"` (`color{Brown}"decapitation"`) usually results in the growth of lateral buds.
● It is widely applied in `color{violet}"tea plantations, hedge-making"`.
● Auxins also `color{violet}"induce parthenocarpy"`, e.g., in tomatoes.
● They are widely used as `color{violet}"herbicides. 2, 4-D,"` widely used to `color{violet}"kill dicotyledonous weeds"`, does not affect mature monocotyledonous plants.
● It is used to prepare `color{violet}"weed-free lawns"` by gardeners.
● Auxin also `color{violet}"controls xylem differentiation"` and helps in cell division.
● `color{Auxins}"Auxins"` (from Greek ‘auxein’ : to grow) was first isolated from `color{violet}"human urine"`.
● The term ‘auxin’ is applied to the `color{violet}"indole-3-acetic acid (IAA)"`, and to other natural and synthetic compounds having certain `color{violet}"growth regulating properties"`.
● They are generally produced by the `color{violet}"growing apices"` of the stems and roots, from where they `color{violet}"migrate to the regions"` of their action.
● Auxins like `color{violet}"IAA and indole butyric acid (IBA)"` have been isolated from plants.
● `color{violet}"NAA (naphthalene acetic acid)"` and `color{violet}"2, 4-D (2, 4-dichlorophenoxyacetic)"` are synthetic auxins.
● All these auxins have been used extensively in `color{violet}"agricultural and horticultural practices."`
● They help to `color{violet}"initiate rooting"` in stem cuttings, an application widely used for `color{violet}"plant propagation"`.
● Auxins `color{violet}"promote flowering"` e.g. in pineapples.
● They help to `color{violet}"prevent fruit and leaf drop"` at early stages but promote the `color{violet}"abscission"` of older mature leaves and fruits.
● In most higher plants, the `color{violet}"growing apical bud"` inhibits the growth of the lateral (axillary) buds, a phenomenon called `color{Brown}"apical dominance"`.
● `color{violet}"Removal of shoot tips"` (`color{Brown}"decapitation"`) usually results in the growth of lateral buds.
● It is widely applied in `color{violet}"tea plantations, hedge-making"`.
● Auxins also `color{violet}"induce parthenocarpy"`, e.g., in tomatoes.
● They are widely used as `color{violet}"herbicides. 2, 4-D,"` widely used to `color{violet}"kill dicotyledonous weeds"`, does not affect mature monocotyledonous plants.
● It is used to prepare `color{violet}"weed-free lawns"` by gardeners.
● Auxin also `color{violet}"controls xylem differentiation"` and helps in cell division.