Characteristic of callus, Biology

Assignment Help:

Characteristic of Callus

The most important characteristic of callus from a functional view point is that abnormal growth has the potential to develop normal roots, shoots and embryoid that can form plants. Callus cultures become brown and necrotic if allowed to grow on the same medium for an extended period because of the depletion of essential nutrients, gradual desiccation of the agar due to water loss and accumulation of toxic metabolites in the medium the tissue may eventually die. The callus is cut into two or more pieces and transferred to a fresh medium. Such cultures are referred to as "sub-cultures". After a few subcultures some tissue systems do not require exogenous auxin for callus proliferation. Such cultures are said to have become 'habituated to auxin". However, this phenomenon is not a genetic change but a selective gene expression as habituated cultures are known to revert to auxin requirement with time.


Related Discussions:- Characteristic of callus

Define micronutrients requirements for anorexia nervosa, Define Micronutrie...

Define Micronutrients Requirements for Anorexia Nervosa? It is advisable to include one 100% RDA multivitamin tablet with minerals. The use of prophylactic thiamine supplements

Role of citric acid cycle, The citric acid cycle, also called as the tricar...

The citric acid cycle, also called as the tricarboxylic acid (TCA) cycle or Krebs cycle (after its discoverer in the year of 1937), is used to oxidize the pyruvate making during th

Swine-pox, Swine-pox Pigs of 2 months of age may be infected with vaccinia...

Swine-pox Pigs of 2 months of age may be infected with vaccinia either naturally or artificially and show pox lesions on the eyelids, snot, inside the thigh and undersurface of th

Define the term- ultrafiltration, Define the term- Ultrafiltration Ultr...

Define the term- Ultrafiltration Ultrafiltration occurs when the flow of a substance across a cell membrane is increased by a hydrostatic pressure. This process was initially b

The control group should be identical, If you have a control group for your...

If you have a control group for your experience, which of the following statements is true? A. The control group should be identical to each test group with the exception of one va

Enumerate the history of neuropsychological, Enumerate the history of neuro...

Enumerate the history of neuropsychological The typical neuropsychological exam begins with a careful history taking. Areas of interest include: Medical history of patie

Oral route - administration of drugs, Oral Route Paediatric Medication...

Oral Route Paediatric Medications are prepared as Tablets (which can be crushed), powders, granules, mixtures, emulsions, elixirs and syrups. It is easier to persuade olde

In unilocular ovary with a single ovule the placentation, In unilocular ova...

In unilocular ovary with a single ovule the placentation is : 1. Marginal 2. Basal 3. Free Central 4. Axile Basal

Explain phenotypical traits, Why is not Mendel's second law always valid fo...

Why is not Mendel's second law always valid for two or more phenotypical traits of an individual? Mendel's second law, or the law of the independent assortment, is valid for g

Use of echocardiography in pericardial diseases, Q. Use of echocardiography...

Q. Use of echocardiography in pericardial diseases? One of the earliest clinical applications of echocardiography was in the detection of pericardial effusion and it remains th

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