Commercial Applications
Commercial Application
Auxins
- Discovery of IAA led to the synthesis of wide range of compounds by chemists. The synthetic auxins are economical than IAA to produce and often more active because plants generally do not have necessary enzymes to break them down.
- NAA ( Naphthalene acetic acid)
- Indole propionic acid
Stimulates fruiting- help natural fruit set. Sometimes causes fruit setting in absence of pollination (Parthenocarpy).
- 2,4D (2,4 Dichloro phenoxy acetic acid)
Selective weed killer. Kills broad leaved species (dicots). Used in cereal crops and lawns to eliminate weeds.
Inhibits sprouting of potatoes.
Prevents premature fruit drop ( retard abscission).
Gibberellins
- GA promote fruit setting e.g. in tangerines and pears and are used for growing seedless grapes. (Parthenocarpy) and also increase the berry size.
- GA3 is used in the brewing industry to stimulate a-amylase production in barely and this promotes malting.
- To delay ripening and improve storage life of bananas and grape fruits.
Cytokinins
- Cytokinins delay aging of fresh leaf crops, such as cabbage and lettuce (delay of senescence) as well as keeping flowers fresh. They can also be used to break dormancy of some seeds.
Abscisic Acid
- Abscisic acid can be sprayed on tree crops to regulate fruit drop at the end of the season. This removes the need for picking over a large time- span.
Ethene
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