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

Mechanical means of instrument cleaning, Q. Mechanical means of instrument ...

Q. Mechanical means of instrument cleaning? Using mechanical means of instrument cleaning rather than hand scrubbing should minimize handling of instruments. If procedures are

Coral reefs, Coral reefs form in clear warm tropical seas and are particula...

Coral reefs form in clear warm tropical seas and are particularly well developed in the South Pacific. They are formed by accumulation in calcarious skeletons of tiny colonial anim

Describe briefly about acquired traits, Why acquired traits are not directl...

Why acquired traits are not directly related to the process of evolution? As acquired traits are not genetically determined, they cannot be passed on to offspring. Thus, they

Temperate deciduous forest - ecosystem, Temperate deciduous forest - Ecosys...

Temperate deciduous forest - Ecosystem The temperate forests are characterised by a moderate climate and broad-leafed deciduous trees, which shed their leaves in fall, are bar

State about the blood ocular barriers of the eye, State about the blood ocu...

State about the blood ocular barriers of the eye? Blood Ocular Barrier: All vascular beds of the eye are highly permeable to lipoid soluble substances (oxygen, carbon dio

Human respiratory system - Trachea, TRACHE A - It is a thin walled ...

TRACHE A - It is a thin walled tube. Situated on ventral side. Commonly known as wind pipe. Supported by C-shaped cartilagenous rings. Incomplete dorsally due to oesopha

Obelia, economic importance

economic importance

Hazards of oxygen therapy - respiratory failure, Hazards of O 2 Therapy ...

Hazards of O 2 Therapy Exposure to greater than 60 per cent O 2 , for a period of more than 36 hours, or exposure to 100 per cent 0, for a period of more than 6 hours, res

Determine the significance of mesoglea, Determine the significance of Mesog...

Determine the significance of Mesoglea. The jellylike layer found between endodermal and ectodermal cell layers of diploblastic organisms. It acts as a type of cement holding 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