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

Difference between rough and smooth endoplasmic reticulum, Q. What is the d...

Q. What is the difference between rough and smooth endoplasmic reticulum? The endoplasmic reticulum is a delicate membranous structure contiguous to the nuclear membrane as wel

What carbohydrates does a plant make from glucose, (a) What carbohydrates d...

(a) What carbohydrates does a plant make from glucose? (b) Which of these carbohydrates is transported round the plant? (c) Which carbohydrate is the main s

How are the concepts of dna, How are the concepts of DNA, gene, proteins an...

How are the concepts of DNA, gene, proteins and characteristics of living beings related? Characteristics of organisms depend on chemical reactions that happen in them. These r

Symbiotic nitrogen fixers - nutrient cycles, Symbiotic Nitrogen Fixers - Nu...

Symbiotic Nitrogen Fixers - Nutrient Cycles Of the symbiotic nitrogen fixing bacteria, species of Rhizobium form root nodules in legumes and are the most studied nitrogen fixe

Explain the endocrine gland and the exocrine gland, What is the difference ...

What is the difference between the endocrine gland and the exocrine gland? Endocrine gland is a gland whose secretions (known as hormones) are collected by the blood and reach

Anti-diuretic hormone, who discovered it? and what is it''s physiologic fun...

who discovered it? and what is it''s physiologic functions?

Show the symptoms of salmonellosis, Q. Show the Symptoms of salmonellosis? ...

Q. Show the Symptoms of salmonellosis? Symptoms: The susceptibility of humans varies with the species and strains of the organism and the total number of bacteria ingested. A

Radiography, R a d i o g r a p h y: ...

R a d i o g r a p h y: Radiograph or X-ray remains the most well-known and primary diagnostic tool of all the imaging modalities. It works b

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