Colour standards: a review and evaluation in relation to Penicillium taxonomy

Christensen, Martha; Miller, S. L.; Tuthill, Dorothy

doi:10.1016/s0953-7562(09)80410-3

Cited by 9 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Raper and Thom, for example, based Penicillium taxonomy classification on the combination of macroscopical (such as colony texture and color) with micromorphological features [ 4 ]. In spite of the fact this feature was regarded as subjective by Pitt and Stolk and Samson, the color of the conidial mass has been pointed out to be a species-specific characteristic that varies in concomitance with distinctive morphological features [ 5 – 7 ]. Dorge et al proposed a method for direct identification of pure Penicillium species using image analysis [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Potential of Penicillium Species in the Bioremediation Field

Leitão

2009

IJERPH

207

View full text Add to dashboard Cite

Abstract:The effects on the environment of pollution, particularly that caused by various industrial activities, have been responsible for the accelerated fluxes of organic and inorganic matter in the ecosphere. Xenobiotics such as phenol, phenolic compounds, polycyclic aromatic hydrocarbons (PAHs), and heavy metals, even at low concentrations, can be toxic to humans and other forms of life. Many of the remediation technologies currently being used for contaminated soil and water involve not only physical and chemical treatment, but also biological processes, where microbial activity is the responsible for pollutant removal and/or recovery. Fungi are present in aquatic sediments, terrestrial habitats and water surfaces and play a significant part in natural remediation of metal and aromatic compounds. Fungi also have advantages over bacteria since fungal hyphae can penetrate contaminated soil, reaching not only heavy metals but also xenobiotic compounds. Despite of the abundance of such fungi in wastes, penicillia in particular have received little attention in bioremediation and biodegradation studies. Additionally, several studies conducted with different strains of imperfecti fungi, Penicillium spp. have demonstrated their ability to degrade different xenobiotic compounds with low co-substrate requirements, and could be potentially interesting for the development of economically feasible processes for pollutant transformation.

show abstract

Section: Introductionmentioning

confidence: 99%

Potential of Penicillium Species in the Bioremediation Field

Leitão

2009

IJERPH

207

View full text Add to dashboard Cite

show abstract

“…The RGB and the color description of each type of tea foam were determined at 0 h after foaming according to Robert Ridgway's Color Standards and Color Nomenclature ( Christensen, Miller, & Tuthill, 1994 ) by the tool in https://colornamer.robertcooper.me/ .…”

Section: Methodsmentioning

confidence: 99%

Biochemical insights into tea foam: A comparative study across six categories

Ni,

Chen,

Pan

et al. 2024

Food Chemistry: X

View full text Add to dashboard Cite

“…Morphological features are described from 6 to 10-d-old cultures grown on malt extract agar (MEA) at room temperature (20-24 ºC). Capitalized color names, followed by plate number, are those of Ridgway (1912, andsee CHRISTENSEN, MILLER &TUTHILL 1994). The strains were also characterized using the standardized methods by PITT (1979), including growth on Czapek yeast autolysate (CYA) agar at 37 °C and growth at 25 °C on MEA, yeast extract sucrose (YES) agar, oatmeal agar, and creatine sucrose agar measured after one week.…”

Section: Methodsmentioning

confidence: 99%

A new species from tropical soils, Eupenicillium tropicum

Tuthill

Frisvad

2004

Mycol Progress

View full text Add to dashboard Cite

ur interest in molecular variation at the population level prompted isolation of large numbers of Eupenicillium strains from several tropical soils. These strains were all originally identified as E. shearii, based on cultural characters and morphology of the anamorphic structures. However, ISSR fingerprinting indicated that we were actually dealing with two taxa, and subsequent phylogenetic analysis using ITS-LSU sequences showed that the two taxa were distinct species (TUTHILL, this issue). One of the species was clearly E. shearii, since the ex-type strain of that species was included in the cluster, but the other, larger group could not be assigned to any known species of Eupenicillium. An additional strain in our collection, from the Galapagos Islands, matched the new species in every respect. The new species is described here as Eupenicillium tropicum sp. nov.Forty-three strains of Eupenicillium tropicum sp. nov. were isolated from soils collected in India, Costa Rica and Galapagos, Ecuador. The species is characterized by biverticillate penicilli, slightly rough, subglobose to ovate conidia, brownish cleistothecia that become brown-gray with age, and ascospores with two equatorial flanges and slightly roughened valves. All strains produced a large number of indole alkaloids, and many types of unknown secondary metabolites with characteristic chromophores were produced by a majority of strains. Eupenicillium tropicum is morphologically most similar to E. shearii, but based on ITS-LSU sequences, is most closely related to Penicillium citrinum, P. sartoryi and P. westlingii. Eupenicillium shearii strains consistently produce paxillin, paspalinine and shearinins, while the latter three penicillia all produce citrinin consistently.

show abstract

Colour standards: a review and evaluation in relation to Penicillium taxonomy

Cited by 9 publications

References 23 publications

Potential of Penicillium Species in the Bioremediation Field

Potential of Penicillium Species in the Bioremediation Field

Biochemical insights into tea foam: A comparative study across six categories

A new species from tropical soils, Eupenicillium tropicum

Contact Info

Product

Resources

About