Question

In hyponasty, the bud will remain
a. Open
b. Closed
c. Semi-open
d. Wilt

Answer 1

Hint: There exists an upward movement which is determined by a higher rate of cell expansion on the lower (that is abaxial) compared with the upper (that is adaxial) side in a plant. One can say that this movement is called hyponasty. We can say that the hyponasty is a common phenomenon amongst rosette species which are facing environmental stresses.

Complete answer:
When we talk about the environmental stresses, the factors such as flooding, the proximity of neighbors, or elevated ambient temperature can be included in environmental stresses.

The process of upward bending or unraveling of leaves which are typically resulting from the greater growth of the lower side is the procedure of hyponasty. The above process leads to the excess growth of the plant on the lower side. Thus, we can say that the flower will remain closed as a result of hyponasty.

However, we can say that the flower will open as a result of the epiphany. It is due to the reason that the growth on the upper side will be more than the lower side.

Nutation is the circular influential movement of the tip of a growing shoot which results in the semi opening of the flower. The buds wilt when there is an absence of the required amount of nutrition.

Hence, the correct answer is option (B).

Note: The responses to plant parts to an external stimulus is called a Nastic movement. One can define the term Epinasty as the downward circuitous or limp of a bud which is actually resulting from the greater development of the upper side than of the minor side. Thus, we know that the movement of Epinasty and hyponasty comes into the authority when the bud needs to close and open respectively.