scholarly journals Editorial: Actinobacteria in Special and Extreme Habitats: Diversity, Function Roles, and Environmental Adaptations

2016 ◽  
Vol 7 ◽  
Author(s):  
Sheng Qin ◽  
Wen-Jun Li ◽  
Syed G. Dastager ◽  
Wael N. Hozzein
Keyword(s):  
Environmental Adaptations ◽  
Extreme Habitats

Actinobacterial Communities of Chosen Extreme Habitats in China

2020 ◽  
Vol 68 (3) ◽  
Author(s):  
Pengli Jia ◽  
Miao Li ◽  
Haiyan Feng ◽  
Mutian Ma ◽  
Jingping Gai ◽  
...  
Keyword(s):  
Extreme Habitats

Diversity among different populations of a locally common rice (Oryza sativa L.) landrace from north-western Indian Himalayas

2010 ◽  
Vol 8 (2) ◽  
pp. 151-158 ◽  
Author(s):  
S. Kumar ◽  
A. Pandey ◽  
I. S. Bisht ◽  
K. V. Bhat ◽  
P. S. Mehta
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Morphological Characters ◽  
Ex Situ ◽  
Evolutionary Forces ◽  
Minimum Number ◽  
Environmental Adaptations ◽  
Farmer Management ◽  
Different Populations ◽  
On Farm

Genetic structure of five populations of a locally common rice (Oryza sativa L.) landrace Jaulia from parts of Uttarakhand state of India was studied using sequence tagged microsatellite site (STMS) markers. Of these, four populations were on-farm managed, assembled from different niche environments, and one population was conserved ex situ and represented static conservation. The 16 STMS primer pairs fully differentiated the inter- and intrapopulation diversity. A total of 72 alleles were recorded with a mean of 4.5 alleles per locus. Population wise, the total number of alleles ranged from 21 to 41, with maximum number of alleles for population IC 548358 and minimum number of alleles for population IC 100051 representing static conservation. A greater number of alleles specific to populations under farmer management could be recorded. Changes in yield parameters also seemed to be affected under farmer management besides other environmental adaptations for qualitative morphological characters. The marker diversity using STMS primer pairs indicates the genetic differentiation among populations resulting from joint effects of several evolutionary forces operating within the historical and biological context of the crop landrace. The variations in adaptations, on the other hand, indicate the degree to which populations are adapted to their environments and their potential for continued performance or as donors of characters in plant breeding. Both biotic and abiotic aspects of the environment are involved.

scholarly journals Brief review of phototrophs in the Crimean hypersaline lakesand lagoons: diversity, ecological role, the possibility of using

2017 ◽  
Vol 2 (2) ◽  
pp. 80-85 ◽  
Author(s):  
N. V. Shadrin ◽  
E. V. Anufriieva ◽  
S. N. Shadrina
Keyword(s):  
Secondary Metabolites ◽  
Oxygenic Photosynthesis ◽  
Green Bacteria ◽  
Ecological Role ◽  
Anoxygenic Photosynthesis ◽  
Adaptive Mechanisms ◽  
Different Types ◽  
Extreme Habitats

Widespread, including in Crimea, hypersaline waters are among the most extreme habitats of the planet. The need to adapt organisms to living in polyextreme environment has led to the development of a variety of adaptive mechanisms with a synthesis of unique secondary metabolites, which makes organisms dwelling hypersaline waters very promising to use them in different areas of biotechnology and aquaculture. There are three groups of phototrophs using different types of phototrophy in the Crimean hypersaline waters: oxygenic photosynthesis (cyanobacteria, microalgae, and plants), anoxygenic photosynthesis (purple and green bacteria) and proton bacteriorhodopsin pump (archaea). Diversity and roles of these groups in the Crimean lakes and lagoons as well as some perspectives of their practical use are discussed.

scholarly journals Observations of the genus Muelleria (Bacillariophyceae) from the Republic of North Macedonia

2019 ◽  
Vol 152 (2) ◽  
pp. 293-312
Author(s):  
Zlatko Levkov ◽  
Danijela Vidaković ◽  
Aleksandra Cvetkoska ◽  
Danijela Mitić-Kopanja ◽  
Svetislav Krstić ◽  
...  
Keyword(s):  
New Species ◽  
Distinct Species ◽  
Biodiversity Survey ◽  
Diatom Flora ◽  
The North ◽  
Unknown Species ◽  
Valve Size ◽  
Extreme Habitats ◽  
The Republic ◽  
Microscopy Techniques

Background and aims – An increased interest in the diatom flora from subaerial habitats in the Republic of North Macedonia has revealed the presence of a large number of interesting and often unknown, species. During a recent biodiversity survey, seven Muelleria species were recorded, several of which could not be identified based on the available literature. Methods – Using both Light Microscopy and Scanning Electron Microscopy techniques, the morphology of several Muelleria species has been analysed. The morphology of all taxa is described, illustrated and compared with other possible similar Muelleria taxa, known worldwide. Key results – Four already documented Muelleria species, M. gibbula, M. islandica, M. terrestris and M. undulata (= Navicula gibbula f. undulata) were identified, while two distinct species are described as new. These new species belong to the M. gibbula complex, and can be differentiated by valve size, stria density, shape of the proximal raphe ends and the shape of external areola foramina. The identity of one taxon remains uncertain due to a low number of observed specimens in the samples. As their ultrastructure is almost entirely unknown, they are briefly discussed. Conclusions – The diversity of Muelleria in Europe and the North Hemisphere is most likely underestimated and some of the previous records of M. gibbula belong to other species. Observations of diatoms from “extreme” habitats such as intermittent ponds, wet mosses and soils can reveal the existence of interesting and new species.

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