Root - plant growth substances, Biology

Assignment Help:

Root - Plant Growth Substances

Induction of roots by auxins in stem cuttings is a well known phenomenon. The concentrations needed are much lower as compared to that which promotes shoot growth. Auxins also induce lateral root growth at lower concentrations. High concentrations of auxins are inhibitory to root growth. The auxin transport is basipetal in nature. Produced in shoot apex and lateral active shoot buds-auxins percolate towards roots. Obviously, the concentrations that reach roots are low.

The presence of cytokinins is a must for promotion of cell division in root tips. Cytokinins also interact with auxins in the cellular differentiation to produce roots and shoots. Gibberellins do not seem to be having much role in root growth. Ethylene plays vital role in affecting the nastic responses and geotropism. It also promotes dormancy in buds.


Related Discussions:- Root - plant growth substances

How are human voices created, How are human voices created? Human voice...

How are human voices created? Human voice is formed with the help of muscles in the neck and the vocal cords. The tighter the vocal cords the higher the pitch of voice. This is

What is the production of the rna, Q. What is the production of the RNA cal...

Q. What is the production of the RNA called and what is the enzyme that catalyzes the procedure? The making of the RNA from information contained in the DNA is called transcrip

To show the direction of sprout growth in seeds, To show the direction of s...

To show the direction of sprout growth in seeds Soak pumpkin or other large seeds overnight and fasten three of them on needles as shown in the diagram. Fasten single with the

Explain vitamin a deficiency - micronutrient deficiencies, Explain Vitamin ...

Explain Vitamin A Deficiency - Micronutrient Deficiencies? Vitamin A deficiency (VAD) is a major public health problem, and the most vulnerable are preschool children and pregn

Soil-environmental components, Soil-Environmental Components The word s...

Soil-Environmental Components The word soil is derived from Latin word 'solum' meaning earthy material in which plants grow. The soil is the consolidated outer layer of the ear

Explain the the use of soy protein in food industry, The use of soy protein...

The use of soy protein concentrates in different applications in food industry is highlighted herewith. a. Bakery products Unlesss higher protein fortification leve

Explain about precautionary principle, Q. Explain about precautionary princ...

Q. Explain about precautionary principle? The ethical values of biodiversity highlights the intrinsic value of biodiversity for its own sake and it is independent of the varied

What is the neuromuscular synapse, Q. What is the neuromuscular synapse? ...

Q. What is the neuromuscular synapse? Neuromuscular synapse is the structure through which the neural impulse passes from the axon of a motor neuron to the muscle cell. This st

Determine the muscarinic acetylcholine receptors, Which of the following se...

Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Muscarinic Acetylcholine Receptors (mAChRs) in the SA

Define a technique of implant by using a tissue punch, Using a Tissue Punch...

Using a Tissue Punch The implant heads are located and using a suitable sized tissue punch(depending on the implant diameter), the tissue punch is used and takes a circular pie

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd