Define some features of penicillium, Biology

Assignment Help:

Define some features of Penicillium?

The identifying features of Penicillium are:

1. Mycelium consists of colourless, septate and branched hyphae, some of which grow inside the substratum to get nutrients and the rest spread on the surface. Former are called haustaria hyphae.

2. Erect, tubular septate hyphae called conidiophores grow outward in the air from any cell of the mycelium. No foot cells are present in Penicillium. Only one conidiophore arises from one cell.

3. Unlike Aspergillus, conidiophores branches once, twice or even more times to produce primary, secondary or tertiary branches. The ultimate branches bears tufts of flask shaped structures called sterigmata (phialides). These branches are called the metulae while lower branches which support the metulae are called rami. At the tip of the sterigmata, a long chain of conidia arise in a basigenous arrangement. The conidia are shed continuously. The conidiophore along with remi, metulae, sterigmata and conidia gives artist's brush or broom like appearance and the structure is called penicillus.

4. The conidia are tiny, uninucleate and unicellular, globose, solid, elliptical or pyciform structures. These may be smooth or rough.

5. Sexual reproduction is observed in a few species by formation of asci containing ascospores. Ascospores are uninucleate, lens shaped structures.


Related Discussions:- Define some features of penicillium

Define maternal dietary intake and foetal outcome, Define Maternal Dietary ...

Define Maternal Dietary Intake and Foetal Outcome? Among the various nutrients, energy intake appears to be the most crucial, for developing countries. Studies from India have

Bty100, 1. (a) Which physicochemical properties need to be regulated by the...

1. (a) Which physicochemical properties need to be regulated by the cell? Define chemical equilibrium and discuss how it is maintained by the cell. (b) Differentiate between facili

What is the location of the salivary glands in humans, What is the location...

What is the location of the salivary glands in humans? There are 6 major salivary glands and they are located one in every parotid gland, two beneath the mandibles (submandibul

What are the features of retrograde peri-implantitis, The Features of Retro...

The Features of Retrograde Peri-Implantitis include: - Periapical Bone loss without gingival inflammation. - Microflora consisting mainly of streptococci and nonmotile organ

How is cancer usually treated, Q. How is cancer usually treated? If the...

Q. How is cancer usually treated? If the cancer is in its initial stage cure is often done by surgical removal of the neoplastic tissue. The Cancers already disseminated are of

Explain nutritional effects of hemicelluloses, Nutritional effects Of Hemic...

Nutritional effects Of Hemicelluloses Hemicelluloses are classified under the category of soluble dietary fibers.  Hemicellulose is an indigestible complex carbohydrate that ab

Define the term - cholera, Define the term - Cholera Cholera is caused...

Define the term - Cholera Cholera is caused by the gram negative,  V. cholerae, which is acquired by ingesting food or water contaminated  by faecal material from patients or

Define the coenzyme activity of nicotinic acid, Define the Coenzyme activit...

Define the Coenzyme activity of nicotinic acid? Nicotinamide exists within the redox-active coenzymes,  nicotinamide adenine dinucleotide (NAD) and its phosphate (NADP), which

Do all genetic diseases result no. chromosomes of the cells, Do all genetic...

Do all genetic diseases result from alteration in the number of chromosomes of the cells? Besides aneuploidies there are other genetic diseases, other chromosomal abnormalities

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