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

Explain idal volume and expiratory reserve volume, Explain the following an...

Explain the following and give their values in a normal human adult: a) Tidal volume b) Expiratory reserve volume c) Inspiratory capacity.

Post removal technique using prs kit, Post removal Technique using PRS kit ...

Post removal Technique using PRS kit -Transmetal efficiently doming the post head . -Select suitable sized trephine . -Place drop of RC prep on the post head as lubrican

Plants of dry environment open their stomata only at night, Why do few plan...

Why do few plants adapted to a dry environment open their stomata only at night? Throughout the day in dry habitats the guard cells become the stomata close and flaccid; concur

Explain about the torbed dryer, Explain about the Torbed Dryer? On the ...

Explain about the Torbed Dryer? On the other hand, is a variation of the fluidized bed dryer. This is designed for use with particulate foods. Torbed dryers are used to dry haz

What do you mean by bone implant interface, Q. What do you mean by Bone Imp...

Q. What do you mean by Bone Implant Interface? It consists of remodelled bony tissue. For making it strong implant should not be overloaded during its organization period i.e.

Find a chemically gated protein, You have identified a protein in a cell th...

You have identified a protein in a cell that you know that comes from the human body. With respect to that protein you have also determined that it allows sodium ions to go through

Define structural elements - biological functions of protein, Define Struct...

Define Structural Elements - Biological Functions of Proteins? Structural proteins are fibrous proteins. The well known of the fibrous proteins are possibly the keratins, which

What is st depression with long diastolic filling, Q. What is ST Depression...

Q. What is ST Depression with Long Diastolic Filling? For the person with a slow heart rate and a long period of a diastole after a premature ventricular contraction, the next

Features of estuaries, Features of Estuaries The physicochemical prop...

Features of Estuaries The physicochemical properties of the estuaries have large variation in several parameters and this often creates stressful environment for organisms. T

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