90 research outputs found
FIGURE 5 in The Lichen Flora on Quercus in the Tamentout Forest of Algeria
No full textFIGURE 5. Growth forms of lichens in the Tamentout Forest.Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 205, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
FIGURE 2 in The Lichen Flora on Quercus in the Tamentout Forest of Algeria
No full textFIGURE 2: Number of lichen species on the different phorophytes in the Tamentout Forest.Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 202, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
FIGURE 4 in The Lichen Flora on Quercus in the Tamentout Forest of Algeria
No full textFIGURE 4: Parmeliella testacea from the Tamentout Forest (Belguidoum, A. no. Cl92, ABHCH) A. Thallus overview (h: black hypothallus; arrow: button-shaped soralia). B. close-up of humid, bluish green thallus (arrow: button shaped soralia). C. close-up of wet, olive thallus. Scale bars: 5 mm.Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 205, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
Parmeliella testacea
No full textDescription of Parmeliella testacea from the Tamentout Forest: The species has a squamulose to minutely foliose thallus composed of pale chestnut-brown to gray-brown lobes, forming a rosette. It tightly adheres to its substrate with distinct peripheral lobes and its upper surface is fragile (Fig. 4). When wet, the thallus turns dark blue-gray. The thallus is sorediate with dark gray, coarsely granular soredia formed in predominantly marginal, sometimes also laminar, button-shaped soralia. These soralia are initially concolorous with the thallus surface, their soredia sometimes brittle, on a ± uniform surface, which may become coarsely cracked along the margin. The thallus resides on an arachnoid hypothallus, blue-black in color. In the specimens collected in Algeria, apothecia were not observed; the photobiont is Nostoc. Notes: Only a single corticolous specimen of Parmeliella testacea was found in the Tamentout Forest, growing on Q. suber. The species generally appears to be quite rare, and in France its threat status has been assessed according to IUCN red-list criteria as Vulnerable (VU) by Roux et al. (2017). In the past, the species had been reported from England, but it is considered extinct (Cannon et al. 2021). Specimen examined. ALGERIA. Setif Province: Tamentout Forest, Collection Site 5 (36° 30ꞌ 52ꞌꞌN, 5° 44ꞌ 05ꞌꞌE), 961 m altitude, 2021, Belguidoum, A . no. Cl 92 (ABHCH).Published as part of Belguidoum, Amina, Lograda, Takia & Ramdani, Messaoud, 2022, The Lichen Flora on Quercus in the Tamentout Forest of Algeria, pp. 200-208 in Phytotaxa 566 (2) on page 204, DOI: 10.11646/phytotaxa.566.2.4, http://zenodo.org/record/711917
L. from Algeria
No full textInternational audienceThe aims of this work are to investigate the chemical composition, the antibacterial activity of the essential oil and the chromosome numbers of two populations of Hertia cheirifolia. The samples were collected in the flowering stage, in eastern Algeria locality. The aerial parts of H. cheirifolia were submitted to a hydro-distillation. GC and GC / MS analysed the chemical compositions of the obtained essential oils. The antibacterial activity of essential oils was evaluated using the disks diffusion method against ten bacterial strains. For karyotypic analysis, the squashing method is used. Fifty-eight compounds representing 98.93% of the total oil were identified in H. cheirifolia. The chemical composition is dominated by the presence of major products, α-pinene (48.49 - 53.85%) and Germacrene-D (2.64 - 12.66%). Two distinct chemical breeds were identified, the α-pinene-spathulenol of Batna population, and the α-pinene-germacrene-D of Setif population. The essential oil of H. cheirifolia has a moderate activity against bacteria tested. In contrast, the strains E. coli ATCC 25922, P. syringae ATCC 53543 and E. fecalis ATCC 49452 are resistant to H. cheirifolia essential oils. The observations of root cells meristematic at metaphase of H. cheirifolia gave a diploid chromosome number 2n = 2x = 20, with a basic chromosome number (x= 10)
Characteristics of essential oils of rosmarinus officinalis from eastern Algeria.
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Chemical composition and antibacterial activities of Capparis spinosa essential oils from Algeria
No full textInternational audienceThe essential oils of Capparis spinosa L. collected from six locations in Algeria were obtained by hydro-distillation. The chemical composition of oils was performed by GC-MS. The disc diffusion method is applied for the antibacterial activity. The extraction produced low yield (0.03%). The result of chromatographic analysis (GC/MS) leads to the identification of 33 components; palmitic acid (38.19%), nonanal-n (12.61%), cymene-2,5-dimethoxy-para (8.94%) and octacosane (5.49%) were the major components of these oils. The result of cluster analysis based on essential oils constituents showed the presence of three chemotypes,i.e., the chemotype of Nonanal-n-Cymen 2,5 dimethoxy para-Dodecanal, the chemotype of Nonanal-n-Hexadecanoic acid-tetracosane and the chemotype Tetracosane-n-pentyl furane-2-octacosane. In-vitro antimicrobial activity of caper oils against nine bacterial species showed that the oils have no activity against E. coli and have modest activities against eight other bacterial species tested; however, the desirability test shows that the oils used were not effective on the bacteria tested
Variation of essential oils composition of pituranthos scoparius in Algeria
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Characteristics of essential oils of rosmarinus officinalis from eastern Algeria.
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