Actinomycetes are known to be the most prolific producers of biologically active metabolites. Here, we investigated the host species-specificity and the related secondary metabolites of actinomycetes that are associated with three different Australian ascidians, namely Symplegma rubra, Aplidium solidum, and Polyclinum vasculosum. Results indicated that while isolates from the genera Streptomyce...

Actinomycetes family including Streptomyces species have been a major source for the discovery of novel natural products (NPs) in the last several decades thanks to their structural novelty, diversity and complexity. Moreover, recent genome mining approach has provided an attractive tool to screen potentially valuable NP biosynthetic gene clusters (BGCs) present in the actinomycetes genomes. Si...

The study was conducted over the years 2012-2013 in order to evaluate the antagonistic effects of the metabolites of actinomycetes against phytopathogenic fungi of agricultural importance. To demonstrate the antagonist activity of antibiosis, bioassays were performed in vitro using the method of wells with cell-free filtrates and the double layer method with chloroform in order to kill living c...

Shadowed motile elements from actinomycetes were observed with an electron microscope. Included were three strains of Actinoplanes, two of Ampullariella, two of Dermatophilus, two of Spirillospora, and four of "Nocardia" turbata. In addition, three types of previously undescribed actionmycetes were represented: (i) the C(4) group (four strains) forming substrate mycelium breaking into motile ro...

Actinomycetes, a large group of filamentous bacteria account for 70-80% of secondary metabolites available commercially. The present investigation was undertaken with an aim to identify and characterize pigment from actinomycetes. Actinomycetes were isolated from rhizosphere soil samples collected from different regions of Madhya Pradesh state. Out of 85 actinomycetes, only 5 actinomycetes show...

The mean population density of actinomycetes in water samples from eight stations off Little Andaman Island in India ranged from 0.29 x 103 CFU/ml at station 2 (Naval Area) to 0.45 x 103 CFU/ml at station 4 (Chandra Nallah). Density in sediment samples ranged from 1.21 x 103 CFU/g at station 2 (Naval area) to 3.29 x 103 CFU/g at station 6 (Buttler Bay). Forty-one strains were isolated and teste...

Background and Objectives Alkaline pH of the soil facilitates the conversion of phosphate present in phosphate fertilizer applied in the field to insoluble phosphate which is not available to plants. Problem of soluble phosphate deficiency arises, primarily due to needless use of phosphate fertilizer. We sought to biofertilizer with the thermo-tolerant phosphate solubilizing actinomycetes conso...

Abstract: Background: Actinomycetes are unique and ubiquitous organisms in nature historically holding first position as one of the major antibiotic producers. The aim study was screening pre-treatments soil, marine, mangrove samples for isolation producing actinomycetes. Materials Methods: were isolated from pre-treated using different media. They assessed antimicrobial activity by cross strea...

The composition of an arginine-glycerol-salt medium (AGS), suitable for the selective isolation of aerobic actinomycetes, was given. When soil samples were treated with calcium carbonate and plated on the AGS medium, higher total and relative plate counts of actinomycetes were obtained than when other media and methods were used.

In this thoughtful little essay, Dr. Fulton expresses his concern over the ever-widening gap between the humanities and the sciences in modern education. Recent great discoveries in science and medicine may result in still more emphasis on the technological, at the expense of the cultural, training of men for the practice of medicine, itself "a great humanistic enterprise." As one means of brid...