Which plant hormone is responsible for epinasty?

Which plant hormone is responsible for epinasty?

auxin
The co-ordinated anisotropy of growth in epidermal, palisade mesophyll and vascular tissues contributes to epinasty. This phenotype, which is regulated by auxin (indole-3-acetic acid, IAA), controls plant cell division and elongation by regulating the expression of a vast number of genes.

What causes epinasty in plants?

The most common cause of epinasty is ethylene. Ethylene is a gaseous plant hormone that helps fruits ripen. This ethylene stimulates roots to create hollow tubes that connect to adventitious roots. These tiny roots and tubes are used to draw oxygen into the plant.

Does ethylene cause epinasty?

Ethylene was required in tomato petioles to produce the epinastic response and auxin was found to be active in producing epinasty through a stimulation of ethylene synthesis with the resulting ethylene being responsible for the epinasty.

What is epinasty in biology?

: a nastic movement in which a plant part (such as a flower petal) is bent outward and often downward.

Which hormone delays senescence of leaves?

cytokinin
From the above information we can say that cytokinin is the plant hormone which delays senescence and helps in cell division.

Do defoliated plants respond to photoperiodic cycle?

A defoliated plant will not respond to the photoperiodic cycle. It is hypothesised that the hormonal substance responsible for flowering is formed in the leaves, subsequently migrating to the shoot apices and modifying them into flowering apices.

What is difference between Hyponasty and epinasty?

In context|botany|lang=en terms the difference between epinasty and hyponasty. is that epinasty is (botany) the downward curvature of leaves etc due to differential growth rates while hyponasty is (botany) an upward bending of leaves or other plant parts, caused by increased growth on their lower surface.

What causes leaf abscission?

Scientists believe that a reduction in sunlight leads to the reduction of chlorophyll in the leaf due to a reduction in photosynthesis, and this may trigger the abscission of leaves. The actual process occurs when the weaker cells near the petiole are pushed off by the stronger cells beneath them.

Which hormone helps in cell enlargement?

Auxin
Auxin is a plant hormone produced in the stem tip that promotes cell elongation. Auxin moves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of the plant.

Which hormone is responsible for bolting?

Gibberellins promote the growth of dwarf peas and are involved in the bolting (elongation) of rosette plants such as the carrot.

Would a defoliated plant respond to photoperiodic cycle 1 Yes 2 No 3 can’t say 4 Any condition is possible?

No, a defoliated plant will not respond to photoperiodic cycle or stimulus. The photoperiodic is perceived by leaves as, the site of perception of light/dark duration are the leaves, which have been removed in a defoliated plant.

What is meant by defoliation?

transitive verb. : to deprive of leaves especially prematurely Black spot, which looks like its name, attacks leaves. Left untreated, it spreads and multiplies, and can defoliate the plant.—