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

Induction of hydrolases - responses to infection, Induction of hydrolases -...

Induction of hydrolases - Responses to Infection Plants do respond to attack by pathogens. To restrict their spread the cells synthesise and secrete enzymes to hydrolyse the c

What is endocytosis, Which of the following is true for endocytosis? A....

Which of the following is true for endocytosis? A. During endocytosis of GLUT4 transporters in fat cells, there is removal of GLUT4 transporters from plasma membranes. B. Du

Types of amoeboid movements, Types of Amoeboid Movements As the amoeba...

Types of Amoeboid Movements As the amoeba's cell body throws out one or a few pseudopodial lobes, a temporary rear end or uroid is pulled along. The central, more fluid protop

What is the objectives of evaluation of patient clinical, What is the OBJEC...

What is the OBJECTIVES of evaluation of patient clinical examination ? After going through this unit, you should be able to: 1. Carried out the general physics-examination; 2.

Explain enzymatic proteins, Explain Enzymatic Proteins The most varied ...

Explain Enzymatic Proteins The most varied and most highly specialized proteins are those with catalytic activity - the enzymes. Virtually all the chemical reactions of organic

Tissue, Ask ques different tipe tissue and ideas minimum 100 words accepted...

Ask ques different tipe tissue and ideas minimum 100 words accepted#

What is the dissociation and double dissociations, Dissociation and double ...

Dissociation and double dissociations Neuropsychologists typically try to design studies that provide evidence of the differential performance of brain damaged and control subj

Prevalence of coronaru heart diseases, Q. Prevalence of coronaru heart dise...

Q. Prevalence of coronaru heart diseases? Incidence of obesity, diabetes and CHD is increasing in India in almost all age groups. At present, obesity, which is a major risk fa

Seed, Seed A seed is a mature ovule enclosing an embryonic plant, stor...

Seed A seed is a mature ovule enclosing an embryonic plant, stored food material (in endosperm, persistent nucellus or embryo itself) and a seed coat formed by one or two inte

Guidelines for diagnosis and treatment planning, Guidelines for diagnosis a...

Guidelines for diagnosis and treatment planning The diagnosis and planning the case is by far the most important step in the entire sequence of the treatment and due considerat

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