Question

Abscisic acid causes
A. Faster leaf fall
B. Dormancy of buds and seeds
C. Retardation of growth
D. All of the above

Answer 1

Hint: The Abscisic acid is a hormone found in plants also known as ABA. They generally function in the processes which leads to growth and development of a plant. It takes a very important role in developing seeds and maturation of the plants.

Complete Answer:
>The process of accelerating the fall of eaves is generally due to the deficiency of Phosphorus in plants. >Abscisic acid does not play any role in it.
>The retardation of growth in plants is due to the presence of zinc in high concentration in the soil. >Therefore. This phenomenon is not related to Abscisic acid hormone.
>Abscisic acid is a plant hormone that is generally associated with the developmental process in plants which includes dormancy of seeds and buds.
>Hence, we can say that the Dormancy of seeds and buds is caused due to the presence of Abscisic Acid.

Additional Information:In many types of desert plants, this acid can be found on the outermost layer of the seeds which is washed away during raining and only then those seeds would be able to germinate.

Note:The functions of Abscisic acid primarily include abscission (the process of shredding/falling of different parts in plants and animals.) from which it has got its name. This acid is regarded as more inhibitory in nature, not like any stimulatory hormones. In regards to Seed Dormancy, it brings such situations for the seeds where they can synthesize storage proteins. It also inhibits the effects of Gibberellins, a stimulating type of hormones in plants, which is going to stimulate the de novo synthesis in Amylase.