scholarly journals Characterization of natural habitats and diversity of Libyan desert truffles

3 Biotech ◽  
2017 ◽  
Vol 7 (5) ◽  
Author(s):  
Mozidi Bouzadi ◽  
Tine Grebenc ◽  
Ossi Turunen ◽  
Hojka Kraigher ◽  
Hassan Taib ◽  
...  
Keyword(s):  
Natural Habitats ◽  
Libyan Desert ◽  
Desert Truffles

WILD PEAVINE SPECIES (LATHYRUS L.): CHARACTERIZATION OF ACCESSIONS IN TERMS OF PROTEIN CONTENT IN THEIR SEEDS AND GREEN BIOMASS

2020 ◽  
Author(s):  
M.O. BURLYAEVA ◽  
◽  
A.E. SOLOVEVA ◽  
E.A. SERGEEV ◽  
N.I. TOPILSKAYA ◽  
...  
Keyword(s):  
Protein Content ◽  
Grain Legumes ◽  
Natural Habitats ◽  
Fodder Crops

The catalogue presents the results of the assessment of protein content in green biomass and seeds of 367 accessions from the VIR collection, representing 25 wild peavine species, during their introduction into Ukraine and into Leningrad and Tambov Provinces of Russia. Besides, it includes the data on the protein content in green biomass of 65 accessions, representing 12 wild peavine species, collected in their natural habitats in Russia and China. The catalogue is addressed to experts in fodder crops and grain legumes.

scholarly journals Bioacoustic characterization of mating calls of a freshwater fish (Prochilodus magdalenae) for passive acoustic monitoring

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Sebastián Muñoz-Duque ◽  
Silvia López-Casas ◽  
Héctor Rivera-Gutiérrez ◽  
Luz Jiménez-Segura
Keyword(s):  
Pulse Rate ◽  
Peak Frequency ◽  
Acoustic Monitoring ◽  
Passive Acoustic Monitoring ◽  
Natural Habitats ◽  
Train Duration ◽  
Acoustic Characterization ◽  
Species Specific ◽  
Passive Acoustic

Fish produce sounds that are usually species-specific and associated with particular behaviors and contexts. Acoustic characterization enables the use of sounds as natural acoustic labels for species identification. Males of Prochilodus magdalenae produce mating sounds. We characterized  these sounds and tested their use in natural habitats, to use passive acoustic monitoring for spawning ground identification. We identified two types of acoustic signals: simple pulses and pulse trains. Simple pulses were 13.7 ms long, with peak frequency of 365 Hz, whereas pulse train were 2.3 s long, had peak frequency of 399 Hz, 48.6 pulses and its pulses lasted 12.2 ms, with interpulse interval of 49.0 ms long and 22.3 Hz pulse rate. We did not detect spawning in  absence of male calls nor differences in male sounds at different female densities. We found differences in train duration, pulse rate, and pulse duration in trains, according to the fish's source sites, but these sites were not well discriminated based on bioacoustical variables. In rivers, we located two P. magdalenae spawning grounds and recognized calls from another fish species (Megaleporinus muyscorum). We did not find a significant relationship between fish size and call peak frequency for P. magdalenae.

Isolation of lignocellulose-decomposing actinomycetes and degradation of specifically 14C-labeled lignocelluloses by six selected Streptomyces strains

1979 ◽  
Vol 25 (11) ◽  
pp. 1270-1276 ◽  
Author(s):  
Mary Beth Phelan ◽  
Don L. Crawford ◽  
Anthony L. Pometto III
Keyword(s):  
Water Soluble ◽  
Side Chain ◽  
Lignocellulose Degradation ◽  
Structural Components ◽  
Natural Habitats ◽  
Cultural Conditions ◽  
Ring Structures ◽  
Limited Degree ◽  
Enrichment Techniques

Forty-two actinomycete strains were isolated by enrichment techniques from soils and other lignocellulose-containing natural habitats. Isolates were screened for their lignocellulose-decomposing abilities using a substrate weight loss – 14C-labeled lignocellulose degradation assay which determined the relative abilities of each isolate to attack lignin versus glucan components of lignocellulose. Six Streptomyces strains were selected for further study, based upon their abilities to decompose significantly both lignin and glucan components of lignocellulose. The selected strains were examined under defined cultural conditions for their abilities to decompose 14C-labeled lignocelluloses prepared from Douglas fir. The 14C-labeled lignocellulose substrates included specifically lignin-labeled or glucan-labeled lignocelluloses, and two [14C]lignin lignocelluloses labeled specifically in only the lignin side chain or ring components. Results showed that the Streptomyces strains decomposed substantial amounts of both lignin and glucan components to 14CO2, and 14C-labeled water-soluble products. As compared with previously described lignocellulose-degrading streptomycetes, these strains were generally more efficient decomposers of the lignin component of lignocellulose, but were similar in their abilities to decompose the glucan component. Characterization of growth on specifically labeled lignins showed that aromatic ring structures within the lignin were cleaved and a substantial percentage of the ring carbons were released as CO2. In contrast, side-chain components were attacked to only a limited degree. These streptomycetes were similar to other recently characterized lignin-decomposing bacteria in their overall abilities to degrade lignin, but their specificity of attack on the structural components of lignin appears to be different.

Genomic characterization of pararetroviral sequences in wild Dahlia spp. in natural habitats

2011 ◽  
Vol 156 (11) ◽  
pp. 2079-2084 ◽  
Author(s):  
S. Eid ◽  
C. V. Almeyda ◽  
D. E. Saar ◽  
K. L. Druffel ◽  
H. R. Pappu
Keyword(s):  
Natural Habitats ◽  
Genomic Characterization

scholarly journals Structural characterization of a variety of spider silks from Turkey using different biophysical techniques

2011 ◽  
Vol 25 (3-4) ◽  
pp. 155-167 ◽  
Author(s):  
Semra İde ◽  
Sevgi Haman Bayarı ◽  
Tuncay Türkeş ◽  
Y. Orhan Mergen ◽  
Ömer Çelik ◽  
...  
Keyword(s):  
Size Range ◽  
Salt Lake ◽  
Natural Habitats ◽  
Nano Structure ◽  
Black Sea Region ◽  
Silk Fibers ◽  
Spider Species ◽  
Mean Size ◽  
Spider Silks

Various experimental methods (XRD, FTIR, SAXS, DLS and SEM) were used to investigate structures of the silk samples weaved by spiders in Turkey. Silk samples were collected from the natural habitats belonging to the spider species (i.e., Near Salt Lake/şereflikoçhisar, İvriz Dam/Ereǧli-Konya, Karataş Lake/Burdur and several locations in Black Sea Region of Turkey). Among all collected species, Araneidae(Araneus angulatus, Argiope bruennichi, Argiope lobata, Larinoides cornutus), Eresidae(Eresus cinnaberinus), Agelenidae(Agelena labyrinthica), Oecobidae(Uroctea durandi), Miturgidae(Cheiracanthium erraticum), Salticidae(Heliophanus flavipes, Philaeus chrysops), Theridiidae(Steatoda paykulliana)and Gnaphosidae were found significant amongst other spider species. Structural differences and similarities of these species were reported. Diameter range of draglines, inter crystallite distance of nano-size structures, mean size range of nano-structure aggregations, crystallite size range, information about protein content were obtained. The mechanical properties of some silk fibers were also investigated.

Characterization of Morphology, Volatile Profiles, and Molecular Markers in Edible Desert Truffles from the Negev Desert

2017 ◽  
Vol 65 (14) ◽  
pp. 2977-2983 ◽  
Author(s):  
Madhu Kamle ◽  
Einat Bar ◽  
Dalia Lewinsohn ◽  
Elinoar Shavit ◽  
Nurit Roth-Bejerano ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Negev Desert ◽  
Volatile Profiles ◽  
Desert Truffles

scholarly journals Identification and characterization of thermophilicSynechococcusspp. isolates from Asian geothermal springs

2007 ◽  
Vol 53 (4) ◽  
pp. 480-487 ◽  
Author(s):  
Hongmei Jing ◽  
Hongbin Liu ◽  
Stephen B. Pointing
Keyword(s):  
Fatty Acids ◽  
Unsaturated Fatty Acids ◽  
Rrna Gene ◽  
Natural Habitats ◽  
Geothermal Springs ◽  
Prolonged Culture ◽  
Total Fatty Acids ◽  
Identification And Characterization ◽  
Fatty Acid Compositions

Two thermophilic cyanobacterial strains, Ts and Bs, collected from Asian geothermal springs were identified morphologically and phylogenetically as Synechococcus in the order Chroococcales and were isolated into axenic cultures. In addition to the high similarities between their full 16S rRNA gene sequences, both strains also shared similar pigment profiles and fatty acid compositions but with varied ratios. Strain Ts had elevated levels of photoprotective pigments such as carotenoid and scytonemin even after prolonged culture under identical laboratory conditions, whereas strain Bs produced more chlorophyll a per unit cell volume, perhaps resulting from UV adaptation in the natural habitats. In addition, strain Ts had more content than strain Bs in terms of the total fatty acids and the proportion of unsaturated fatty acids. Neither isolate was able to fix nitrogen, and they had zero susceptibility to ampicillin and streptomycin.

Identification of some Pathogenic Organisms Involved in Rotting of the Libyan Tirmania Truffles

2021 ◽  
pp. 109-116
Author(s):  
Mohammed Ahmed Emhmed
Keyword(s):  
Environmental Factors ◽  
Ectomycorrhizal Fungi ◽  
Fusarium Solani ◽  
Bacillus Pumilus ◽  
Fruit Body ◽  
Microbial Flora ◽  
Saprophytic Fungi ◽  
Desert Truffle ◽  
Libyan Desert ◽  
Desert Truffles

Truffles are ectomycorrhizal fungi that grow symbiotically with several trees. Truffles are highly valued edible mycorrhizae fungi in economic and gastronomic terms. Desert truffles have been traditionally used as food in Libya. The rotting of truffle due to environmental factors is very common in Libya. The mechanism of truffle rot is complex and attributed mainly due to the infection with fungi, followed by bacteria. In order to document and highlight the rotting of Libyan Desert truffle phenomenon, the existence of microorganisms in the infected fruit body of Tirmania truffles has been investigated. The investigations showed changes in physical characteristics such as color, hardness, and humidity of the studied truffle samples. Also, the results showed a diversity of pathogens involved in the deterioration of truffle includes bacteria (Bacillus pumilus, Citrobacteryoungea), saprophytic fungi (Fusarium solani, Alternariachlamydosporia, and Rhizopusstolonifer). This study concluded the importance of studying microbial flora living in truffle and their environment. Keywords: Libyan Desert truffle; Tirmania; Rotting; Pathogens

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