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

Describe u - waves, Q. Describe U - Waves? The U-wave is usually uprigh...

Q. Describe U - Waves? The U-wave is usually upright if the T is also upright and is highest at low rates. When the heart rate increases to more than 90, the U-wave is rarely v

What do you meam by parthenogenesis, Q. What is parthenogenesis? Parthe...

Q. What is parthenogenesis? Parthenogenesis is the formation or reproduction of a new individual from the egg cell but without fecundation by the male gamete. According to the

Heart output, HEAR T OUTPUT The amount of blood pumped by heart per...

HEAR T OUTPUT The amount of blood pumped by heart per minute. Heart beat is 72. Pump out blood is 70 ml. This 72 × 70 = 5040 ml. ( 5 litres) blood is pumped in a minute.

Compare and contrast enantiomers in relation to sugars, Compare and contras...

Compare and contrast enantiomers, epimers, and anomers, specifically in relation to sugars.

Ph of food in pectic ulcer, Q. PH of food in pectic ulcer? PH of food: ...

Q. PH of food in pectic ulcer? PH of food: It has. a little therapeutic importance except for patients with lesions in the mouth or oesophagus. Most foods are considerably les

Show some fungal diseases transmitted by animal feces, Q. What are some fun...

Q. What are some fungal diseases transmitted by animal feces? Pigeon and Bat feces can carry Histoplasma capsulatum, the fungus agent of histoplasmosis. The infection is transm

Is a gene a triplet of consecutive dna nucleotides, Is a gene a triplet of ...

Is a gene a triplet of consecutive DNA nucleotides? A gene is not a triplet of DNA nucleotides with their respective nitrogen-containing bases, like AAG or CGT. The nucleotide

What is oral hygiene, What is Oral Hygiene  An index can be used to eva...

What is Oral Hygiene  An index can be used to evaluate the oral hygiene level in the patient e.g. Oral hygiene Index (Green and vermilion) or Plaque index (Silness and Loe). An

Define osseointegration and its theories, Q. Define osseointegration and it...

Q. Define osseointegration and its theories? Osseointegration implies that "it is a contact established without interposition of non bony tissue between normal remodeled bone a

Define characteristic of doppler echocardiographic, Q. Define characteristi...

Q. Define characteristic of Doppler Echocardiographic? Ans. Doppler findings of cardiac tarnponade are based on the following characteristic respiratory variations in intr

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