Tag: living world of plants - plant physiology

Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending of a leaf resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from greater growth of the lower side. Circinate ptyxis is found only in fern leaves due to hypoasty. Nutation is the bending movements shown by some plant parts due to the unequal rate of growth of different parts of plants. 

Nastic movements are responses of plant parts to stimuli. Epinasty is the downward bending or drooping of a bud resulting from greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from greater growth of the lower side. 

Nastic movements are responses of plant parts to stimuli. Seismonastiy is the nastic response of a plant to touch or vibration. Dropping of leaves of Mimosa pudica upon touching is due to seismonasty. Thigmonasty is the nastic response of a plant to touch. The movements of tentacles of Drosera when comes in contact with insect is due to thigmonasty. Nutation is the bending movements shown by some plant parts due to the unequal rate of growth of different parts of plants.  

Nastic movements are responses to plant parts to stimuli. Epinasty is the downward bending or drooping of a bud resulting from the greater growth of the upper side than of the lower side. Due to more growth on the upper side, the flower will open as a result of epinasty. The hyponasty is an upward bending or uncoiling of leaves resulting from the greater growth of the lower side. Due to more growth on the lower side, the flower will remain closed as a result of hyponasty.

Nyctinasty is the rhythmic nastic movement shown by plant in response to onset of darkness. Chemonasty is the nastic movement shown by plant in response to external chemical stimuli. Antherozoids are attracted towards archegonia in a fern plant due to chemonastic movement. Thigmonasty is the nastic movement shown by plant in response to the touch. Seismonasty is the nastic movement shown by plant in response to the vibration.

Nastic movement is non-directional movement shown by plant part in response to external stimuli. Thermonastic movement is response shown by plant part to high temperature. Photonastic movement is the response to light. Thigmonastic movement is the response to touch. Chemonastic movement is the response to the chemical.

Nastic movements are responses to plant parts to stimuli. Seismonasty is the nastic response of a plant to touch or vibration. Dropping down of leaves of Mimosa pudica upon touching is due to seismonasty. 

Nastic movements are responses to plant parts to stimuli. Thermonasty is nastic movement shown by the plant in response to high temperature. Photonasty is nastic movement shown by the plant in response to light. Hydronasty is nastic movement shown by the plant in response to water current. Thigmonasty is nastic movement shown by the plant in response to touch or vibration. Opening and closing of tulip flower is thermonastic movement. Sunflower shows photonastic movement. Thus, the correct answer is option A.

Nyctinastic movement is the rhythmic nastic movement of plant in response to the onset of darkness. It is also called as sleep movement. Drooping of legume leaves in dark is due to nyctinasty. Mimosa pudica shows nyctinastic movement.