scholarly journals Do Metabolomics and Taxonomic Barcode Markers Tell the Same Story about the Evolution of Saccharomyces sensu stricto Complex in Fermentative Environments?

2020 ◽  
Vol 8 (8) ◽  
pp. 1242
Author(s):  
Luca Roscini ◽  
Angela Conti ◽  
Debora Casagrande Pierantoni ◽  
Vincent Robert ◽  
Laura Corte ◽  
...  
Keyword(s):  
Cellular Response ◽  
High Performance ◽  
Single Copy ◽  
Sensu Stricto ◽  
Ethanol Stress ◽  
Resting Cells ◽  
Closely Related Species ◽  
Saccharomyces Sensu Stricto ◽  
Physiological Properties ◽  
Increasing Trends

Yeast taxonomy was introduced based on the idea that physiological properties would help discriminate species, thus assuming a strong link between physiology and taxonomy. However, the instability of physiological characteristics within species configured them as not ideal markers for species delimitation, shading the importance of physiology and paving the way to the DNA-based taxonomy. The hypothesis of reconnecting taxonomy with specific traits from phylogenies has been successfully explored for Bacteria and Archaea, suggesting that a similar route can be traveled for yeasts. In this framework, thirteen single copy loci were used to investigate the predictability of complex Fourier Transform InfaRed spectroscopy (FTIR) and High-performance Liquid Chromatography–Mass Spectrometry (LC-MS) profiles of the four historical species of the Saccharomyces sensu stricto group, both on resting cells and under short-term ethanol stress. Our data show a significant connection between the taxonomy and physiology of these strains. Eight markers out of the thirteen tested displayed high correlation values with LC-MS profiles of cells in resting condition, confirming the low efficacy of FTIR in the identification of strains of closely related species. Conversely, most genetic markers displayed increasing trends of correlation with FTIR profiles as the ethanol concentration increased, according to their role in the cellular response to different type of stress.

Patiriella pseudoexigua (Asteroidea: Asterinidae): a cryptic species complex revealed by molecular and embryological analyses

2003 ◽  
Vol 83 (5) ◽  
pp. 1109-1116 ◽  
Author(s):  
Michael W. Hart ◽  
Maria Byrne ◽  
Sheri L. Johnson
Keyword(s):  
Dna Sequences ◽  
Original Description ◽  
Sensu Stricto ◽  
Genetic Distances ◽  
New Combination ◽  
Sea Stars ◽  
Planktonic Larva ◽  
Closely Related Species ◽  
Planktonic Larvae ◽  
Cryptic Species Complex

Cryptic lineages were identified within a morphologically uniform group of sea stars distributed from Australia to Japan. Among eight populations, all of which have been referred to Patiriella pseudoexigua, we found seven unique mitochondrial DNA sequences clustered into four distinct lineages. These four lineages formed a monophyletic group in which sister clades were separated by small genetic distances but could be differentiated from each other on the basis of reproductive differences. The four lineages thus appear to be separate but very closely related species. Examination of reproduction in several Queensland populations revealed that one population (Statue Bay) consisted of hermaphroditic intragonadal brooders with live-born offspring while other populations (Townsville, Bowen, Airlie Beach) consisted of dioecious free-spawners with a planktonic larva. The brooded larvae from central Queensland populations closely resembled brooded embryos and larvae of a Japanese lineage, while the planktonic larvae from northern Queensland were similar to the original description of planktonic larvae from a Taiwan population. However, each of the viviparous lineages was more closely related to a lineage with planktonic larval development than the viviparous lineages were to each other. Patiriella pseudoexigua thus comprises at least four species with different reproductive phenotypes in which viviparous brooding appears to have evolved in parallel. Based on previous taxonomic work we propose the following names for these four lineages: the dioecious free-spawner from northern Queensland (including the P. pseudoexigua type locality) is P. pseudoexiguasensu stricto; the viviparous brooder from central Queensland is undescribed and here referred to as Patiriella sp. nov; the dioecious free-spawner from Taiwan is temporarily referred to as Patiriella sp. (a senior name for this species may be P. pentagonus); and the hermaphrodite brooder from Japan should be raised to specific status and referred to by the new combination P. pacifica.

scholarly journals Identification of Saccharomyces sensu stricto and Torulaspora yeasts by PCR ribotyping

1997 ◽  
Vol 24 (4) ◽  
pp. 311-315 ◽  
Author(s):  
S. Smole Možina ◽  
D. Dlauchy ◽  
T. Deak ◽  
P. Raspor
Keyword(s):  
Sensu Stricto ◽  
Saccharomyces Sensu Stricto ◽  
Pcr Ribotyping

The Ornithodoros capensis group (Acari: Argasidae): a morphological diagnosis and molecular characterization of O. capensis sensu stricto from Queimada Grande Island, Brazil 

2017 ◽  
Vol 22 (1) ◽  
pp. 28 ◽  
Author(s):  
Sebastián Muñoz-Leal ◽  
Ricardo A. Dias ◽  
Carlos R. Abrahão ◽  
Marcelo B. Labruna
Keyword(s):  
Molecular Characterization ◽  
Related Species ◽  
Morphological Analysis ◽  
Bacterial Pathogens ◽  
Sensu Stricto ◽  
Closely Related Species ◽  
Paulo State ◽  
Morphological Diagnosis ◽  
First Time

Ornithodoros capensis sensu lato (s. l.) is a worldwide-distributed group of soft ticks that parasitize birds in insular and continental lands. It is currently composed of 11 morphologically closely related species. Several viral and bacterial pathogens, and particularly Coxiella-like endosymbiont organisms have been described coexisting with ticks of this group. Since it last report in 1983, the presence of O. capensis s. l. in Brazil has remained undocumented. By a morphological analysis of larvae and a molecular characterization of ticks and Coxiella genes we describe for the first time O. capensis sensu stricto in Brazil from specimens collected on Queimada Grande Island, in São Paulo state.

Cladocerans of the Alona affinis (Leydig, 1860) group from South Africa

Zootaxa ◽  
2009 ◽  
Vol 1990 (1) ◽  
pp. 41-54 ◽  
Author(s):  
ARTEM YU SINEV
Keyword(s):  
South Africa ◽  
South African ◽  
Morphological Characters ◽  
Sensu Stricto ◽  
Closely Related Species ◽  
Unknown Species ◽  
Kwazulu Natal ◽  
African Populations ◽  
Alona Affinis ◽  
The Republic

Study of South African populations of chydorid cladocerans in the Alona affinis-group (Anomopoda: Chydoridae) revealed two closely related species, Alona affinis (Leydig, 1860) and a second, previously unknown, species A. martensi sp. n. No significant differences were seen between South African and Eurasian populations of A. affinis sensu stricto. A. martensi sp. n. differs from other species of the affinis-group by a shorter spine on the basal segment of antennal exopodite, and can be distinguished from A. affinis by a number of additional morphological characters. A. affinis is distributed mainly in the East and South regions of the Republic of South Africa, and is less frequented in this region. Confined mainly to artificial water bodies its presence may be human-mediated. A. martensi sp. n. sems to be endemic to the Drakensberg mountains within the borders of the KwaZulu-Natal Province and Lesotho.

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