Table of Contents
What are Paratonic movements?
Paratonic movements are some plants movements which are caused in response to certain stimuli and are said to be induced or plant movements which take place spontaneously , without any irritability or sensitivity of the protoplasm. Paratonic movements are of three kinds-Tropic, Tactic and Nastic movements.
What are the types of Paratonic movement?
Paratonic movements are the responses exhibited by plants to external stimuli such as sunlight, gravity, water, chemicals, temperature, and turgor. There are several types of paratonic movements: taxes, tropic movements and nastic movements, etc. Plant shoots elongate towards the sunlight.
What is Paratonic movement of growth?
Paratonic growth movement (Tropic and nastic movements) : These are movements of curvature brought about by more growth on one side and less growth on the opposite side of plant organ induced by some external stimuli.
What is the meaning of Paratonic?
Definition of paratonic : resulting from external stimuli paratonic plant growth — compare autonomic.
What is Clinostat used for?
A clinostat is a device which uses rotation to negate the effects of gravitational pull on plant growth (gravitropism) and development (gravimorphism). It has also been used to study the effects of microgravity on cell cultures, animal embryos and spider webs.
What is a phytochrome and what does it do?
Phytochromes are a class of photoreceptor in plants, bacteria and fungi used to detect light. They regulate the germination of seeds (photoblasty), the synthesis of chlorophyll, the elongation of seedlings, the size, shape and number and movement of leaves and the timing of flowering in adult plants.
Which of the following plant movement can be demonstrated by instrument Clinostat?
Which plant is an excellent example for autonomic movement of variation?
(1) Autonomic movements of variation: Telegraph plant (Desmodium gyrans) is an excellent example of such movements.
What is Hypotonicity?
In general, hypotonicity is a condition characterized by the presence of a lesser degree of tone or tension. In cellular level, hypotonicity may pertain to a property of a solution with a comparatively lower concentration of solutes relative to the amount of solutes in another solution.
What does Hypertonicity mean?
1 : exhibiting excessive tone or tension a hypertonic baby a hypertonic bladder. 2 : having a higher osmotic pressure than a surrounding medium or a fluid under comparison.
Why was a wound up clinostat used in the control?
2. The clinostat was invented to enable the constant rotation of an object, such as a plant, around an axis perpendicular to the force of gravity. Experimenters use this device to cancel the effect of gravity by equalizing the gravity vector around the horizontal axis.
What is an Auxanometer used to measure?
increase of growth
An auxanometer (Gr. auxain= “to grow” + metron= “measure”) is an apparatus for measuring increase of growth in plants.