What is Hyponastic movement?

What is Hyponastic movement?

What is Hyponastic movement?

Upward leaf movement, referred to as hyponastic growth, is an active response of several plant species to adverse environmental conditions such as flooding, elevated temperatures, and dense canopies (Ballaré et al., 1997; Cox et al., 2003; Koini et al., 2009; Keuskamp et al., 2010).

What causes Hyponasty?

Petiole hyponasty is upward movement driven by a higher rate of cell expansion on the lower (abaxial) compared with the upper (adaxial) side. Hyponasty is common among rosette species facing environmental stresses such as flooding, proximity of neighbours or elevated ambient temperature.

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.

Which hormone is responsible for epinasty?

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 does Hyponasty mean?

: a nastic movement in which a plant part is bent inward and upward.

What are the types of nastic movement?

The below mentioned article will highlight the four types of nastic movements in plants. The four types are: (1) Seismonastic Movements (2) Photonastic Movements (3) Thermonastic Movements and (4) Nyctinastic Movements.

Which is natural auxin?

Natural auxins are those auxins, which are found naturally in plants, e.g. indole-3-acetic acid (IAA), indole butyric acid (IBA), etc. NAA (naphthalene acetic acid) and 2, 4-D (2, 4-dichlorophenoxyacetic) are synthetic auxins. They are widely used in agriculture.

How many gibberellins are there?

As of 2003, there were 126 GAs identified from plants, fungi, and bacteria. Gibberellins are tetracyclic diterpene acids. There are two classes based on the presence of either 19 or 20 carbons.

How many types of Nastic movements are there?

four types
The below mentioned article will highlight the four types of nastic movements in plants. The four types are: (1) Seismonastic Movements (2) Photonastic Movements (3) Thermonastic Movements and (4) Nyctinastic Movements.

What hormone delays senescence?

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

What is the meaning of Hydronasty?

nastic movement
A nastic movement induced in plant organs by changes in atmospheric humidity. From: hydronasty in A Dictionary of Ecology » Subjects: Science and technology — Life Sciences.

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