Criteria of essentiality, Biology

Criteria of Essentiality

Amon and Stout as early as 1939, suggested certain criteria that an element must fulfil in order to be classified as essential. These criteria are listed below.

  1. An element is essential if in its absence the plant cannot complete its life cycle and form viable seeds.
  2. An element is essential if it forms a part of any molecule or a constituent of the plant that in itself is essential for the plant. For example, nitrogen in protein, magnesium in chlorophyll arid iron in cytochromes.
  3. The element must act directly inside the plant, and not enhance or suppress the availability of some other element.


Posted Date: 1/17/2013 2:13:55 AM | Location : United States

Related Discussions:- Criteria of essentiality, Assignment Help, Ask Question on Criteria of essentiality, Get Answer, Expert's Help, Criteria of essentiality Discussions

Write discussion on Criteria of essentiality
Your posts are moderated
Related Questions
What is the name of the cells capable of making gametes? What is the ploidy of these gamete-forming cells? The cells that form gametes are the germ cells as opposed to the soma

What is nuclear pollution? Nuclear pollution having of radiations emitted from atomic nuclei, these radiations is highly injurious to living beings. They can be originated from

DISORDERS OF LIVER: In the foregoing  sections and sub-sections we have discussed about the common disorders of upper and lower gastrointestinal  tract. Now we shall discuss

Arrayed library: An individual primary recombinant clones (hosted in the phage, cosmid, YAC, or other vector) which are placed in two- dimensional arrays in microtiter dishes. Eac

1 list the names of the phyla of animalike protists that have only free-living members

Determine the categories of sleep disorders Sleep disorders are generally divided into two major groups: 1) Narcolepsy, which is characterised by excessive sleep or brief in

Cleft grafting  The stem of the stock is cut across. A 'V' shaped insertion is made at the end of the stock. The scion is cut in shape. The scion is inserted into the 'V'

discuss the importance of protozoa to humans

Placing the Implants in Immature Grafted Sites One of the most common causes of prosthetically related implant failure is believed to be the too rapid loading of the implant su

List the parameters under which you will evaluate implant prosthesis The various parameters under which implant prosthesis can be evaluated are: i) Assessment of mobility.