Question

Which synthetic growth regulator is used to promoting synchronized flowering in Pine-apple
A. Indole butyric acid
B. Phenyl mercuric acetate
C. Benzyl aminopurine
D. 2-Chloroethyl phosphonic acid

Answer 1

The synthetic plant growth regulators are the compounds that are used for the optimization of the crops, to yield more crops and also to overcome the natural growth regulator system. The growth regulator that is used to induce flowering belongs to the phosphonic acid group.

Complete answer: The 2-Chloroethyl phosphonic acid is a compound which is used for the plant growth and helps in the ripening of the fruit quickly. It is widely used to initiate the reproductive development of the pineapple, these are sprayed on the mature pineapple that is green pineapple, they are then converted to ethylene that has low toxic levels and thus, flowering is promoted.
i. The indole butyric acid is a synthetic plant hormone which belongs to the auxin family, it is also called as the IBA. This enhances the growth and the development of the crop and is applied to the soil or the leaves. It is similar to the naturally occurring substance, the phenylmercuric acetate is the organic compound which inhibits the process of transpiration in the plants they are also known as the antitranspirant.
ii. The benzyl aminopurine is mostly used as the adenine based cytokinin which works as a supplement in the plant growth, they influence the plant growth and the development of the plants. They stimulate the cell division which results in the richness of the fruits and vegetables, in green vegetables they increase the pro harvest life and also helps in their colour retention, e.g. broccoli.
Hence, the correct answer is option is D.

Note: The 2-Chloroethyl phosphonic acid belongs to the phosphonic acid and is used as a plant hormone, they are synthetic ethylene. This acid is used to promote the flowering of the pineapple and they produce the synchronized fruit set of the pineapple.