aspergillus niger morphology and colonial characteristics pdf

Aspergillus niger morphology and colonial characteristics pdf

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Published: 18.11.2020

International Journal of Microbiology

INTRODUCTION

Species Descriptions

Wild type Aspergillus niger isolates from different biotopes from all over the world were compared to each other and to the type strains of other black Aspergillus species with respect to growth and extracellular enzyme profiles. The origin of the A. Differences were observed in the growth rate of the A. In contrast, carbon source specific differences were observed between the different species. Aspergillus brasiliensis is the only species able to grow on D-galactose, and A.

International Journal of Microbiology

Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. Aspergillus is a large genus of anamorphic fungi. Aspergilli have great importance in many fields like plant, animals, and human health etc. The present study was conducted to identify Aspergillus isolates from district Larkana Sindh Pakistan. There are no reports that cover th e whole mycoflora of Sindh province.

The cultivation processes and flocculating treatment for PSW purification were systematically studied. The flocculating rate of the MBFA 18 achieved Furthermore, effects of flocculant dosage, initial pH, coagulant aid CaCl 2 addition and sedimentation time on the PSW treatment were discussed and studied in detail. The optimum flocculation treatment conditions were determined according to the treatment efficiency, cost and flocculation conditions. The comparative study between the bioflocculant and conventional chemical flocculants showed excellent flocculating efficiency of MBFA 18 with lower cost 4. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

INTRODUCTION

Lyngby, Denmark. Aspergillus comprises a diverse group of species based on morphological, physiological and phylogenetic characters, which significantly impact biotechnology, food production, indoor environments and human health. Aspergillus was traditionally associated with nine teleomorph genera, but phylogenetic data suggest that together with genera such as Polypaecilum , Phialosimplex , Dichotomomyces and Cristaspora , Aspergillus forms a monophyletic clade closely related to Penicillium. Changes in the International Code of Nomenclature for algae, fungi and plants resulted in the move to one name per species, meaning that a decision had to be made whether to keep Aspergillus as one big genus or to split it into several smaller genera. The International Commission of Penicillium and Aspergillus decided to keep Aspergillus instead of using smaller genera. In this paper, we present the arguments for this decision. We introduce new combinations for accepted species presently lacking an Aspergillus name and provide an updated accepted species list for the genus, now containing species.


Characteristics and Morphology General Characteristics of Aspergillus Like Aspergillus nidulans, colonies of A. niger that have been exposed to air (in.


See List of Aspergillus species. Aspergillus was first catalogued in by the Italian priest and biologist Pier Antonio Micheli. Viewing the fungi under a microscope, Micheli was reminded of the shape of an aspergillum holy water sprinkler , from Latin spargere to sprinkle , and named the genus accordingly. Aspergillus consists of species of fungi. Aspergillus is defined as a group of conidial fungi—that is, fungi in an asexual state.

Molecular and immunologic tests promise better, faster laboratory diagnosis of aspergillosis, but microscopy and culture remain commonly used and essential tools. Procedural changes, as well as adequate training of laboratory professionals, can enhance the value of these traditional tools. Using Blankophor or Calcofluor for microscopic examinations; improving recognition of morphologic characteristics of opportunistic fungi in stained smears of specimens; maximizing the growth rate and production of conidia by Aspergillus spp. Surveys indicate that the number of laboratory professionals is declining as the demand for healthcare is rising.

Aspergillus Plural Aspergilli is a genus of fungi that consists of about identified species of mold mould. Aspergillus can be found in a variety of environments throughout the world given that their growth is largely determined by the availability of water. The rate at which they grow is largely determined by the temperature range in the environment they grow in.

Species Descriptions

Conidiophores terminate in a vesicle covered with either a single palisade-like layer of phialides uniseriate or a layer of subtending cells metulae which bear small whorls of phialides the biseriate structure. The vesicle, phialides, metulae if present and conidia form the conidial head. Conidia are one-celled, smooth or rough-walled, hyaline or pigmented, are produced in long dry chains which may be divergent radiate or aggregated in compact columns columnar. Most species sporulate within 7 days. Descriptions are primarily based on colony pigmentation and morphology of the conidial head. Microscopic mounts are best made using cellotape flag or slide culture preparations mounted in lactophenol cotton blue.

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4 comments

  • Leontino R. 18.11.2020 at 17:45

    Morphological characteristics may not be sufficient as the microscopic and Colony morphology of A. niger Groups I and II grown on MEA, CYA, DG, and.

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  • Teodor G. 26.11.2020 at 03:55

    niger. The isolation of the species of the Nigri Section on Creatine Sucrose Agar Key words: Polyphasic Taxonomy, β-tubulin gene, Aspergillus spp morphology​. macroscopic observation of their morphological characteristics. Figure 1. Photographs of the colonies of Aspergillus Section Nigri in CYA and MEA 25 ºC after.

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