blanche « Artemisia herba alba ». L'huile essentielle des parties aériennes de l’armoise blanche a été isolée par la méthode d'hydrodistillation. Différentes doses de cette huile ont été ajoutées à ...l’huile de tournesol. La stabilité de l’huile à l’oxydation a été évaluée après un traitement thermique à 180 °C/heure et pendant 15 jours de stockage à température ambiante en analysant l’indice de peroxyde, les diènes conjugués et les triènes conjugués. Les résultats obtenus ont montré que l’huile essentielle étudiée inhibe la formation de produits d’oxydation après le traitement thermique et pendant le stockage de l’huile de tournesol. Donc, d’après les résultats de cette recherche, l’huile essentielle de l’armoise blanche peut être utilisée pour augmenter la stabilité oxydative des huiles végétales.
blanche « Artemisia herba alba ». L'huile essentielle des parties aériennes de l’armoise blanche a été isolée par la méthode d'hydrodistillation. Différentes doses de cette huile ont été ajoutées à ...l’huile de tournesol. La stabilité de l’huile à l’oxydation a été évaluée après un traitement thermique à 180 °C/heure et pendant 15 jours de stockage à température ambiante en analysant l’indice de peroxyde, les diènes conjugués et les triènes conjugués. Les résultats obtenus ont montré que l’huile essentielle étudiée inhibe la formation de produits d’oxydation après le traitement thermique et pendant le stockage de l’huile de tournesol. Donc, d’après les résultats de cette recherche, l’huile essentielle de l’armoise blanche peut être utilisée pour augmenter la stabilité oxydative des huiles végétales.
blanche « Artemisia herba alba ». L'huile essentielle des parties aériennes de l’armoise blanche a été isolée par la méthode d'hydrodistillation. Différentes doses de cette huile ont été ajoutées à ...l’huile de tournesol. La stabilité de l’huile à l’oxydation a été évaluée après un traitement thermique à 180 °C/heure et pendant 15 jours de stockage à température ambiante en analysant l’indice de peroxyde, les diènes conjugués et les triènes conjugués. Les résultats obtenus ont montré que l’huile essentielle étudiée inhibe la formation de produits d’oxydation après le traitement thermique et pendant le stockage de l’huile de tournesol. Donc, d’après les résultats de cette recherche, l’huile essentielle de l’armoise blanche peut être utilisée pour augmenter la stabilité oxydative des huiles végétales.
This research work focused on the study of morphological diversity in 270 types of
known as “white wormwood,” from different bioclimatic stages and its relationship with the distribution and ...adaptation of the species. The phenotypic parameters studied include the aerial vegetative part of the leaves and the flowers. The existing relationships between the ecological conditions and the genetic dynamics expressed by the morphological polymorphism of the populations concerned have been established. Results obtained allowed us to admit that we have two ecotypes in Algeria: the first one has five flowers per capitulum and can be found at the level of the three bioclimatic floors studied; whereas the second one has eight flowers per capitulum occupying only the territories with a Saharan climate. The analysis of variance (ANOVA) and UPGMA dendrogram allowed us to observe a very significant intra- and inter-population morphological polymorphism at the level of each site and between the different sites. This wide variability thus observed for
could help research on a large collection of individuals and therefore to choose the most effective ecotypes in order to reintroduce this species in the steppe areas of Algeria.
The codling moth Cydia pomonella L. (Lepidoptera: Tortricidae) is a destructive pest of apples and pears worldwide. Due to the phytotoxic effect of chemical fumigant on postharvest apple, botanical ...insecticides are an interesting alternative to synthetic chemical insecticides regarding their low environmental impact. Hence, in the present study, we investigated the chemical composition and fumigant toxicity of Artemisia herba-alba essential oil against the fifth-instar codling moth, under laboratory conditions. In total, 49 compounds were identified by gas chromatography/mass spectrometry. The major constituents determined were dextro-camphor (30.60%), 2,6-dimethyl-1,3,6-heptatriene (26.71%), safranal (7.04%), borneol (3.94%) and eucalyptol (3.47%). A. herba-alba essential oil showed strong larvicidal activity, with minimum lethal concentration LC50 values of 13.49 and 04.45 μl L-1 air at 24 h and 48 h, respectively. The LT50 values at the lowest (1.81 μl L-1 air) and highest oil concentrations (18.18 μl L-1 air) were, in turn, 59.35 to 19.52 h. The obtained results indicated that essential oil of A. herba-alba may have a potential to be developed as a botanical fumigant against the fifth-instar codling moth.
•The essential oil of Artemisia herba-alba from Algeria was analyzed by GC-MS.•Hydrocarbon and oxygenated monoterpenes were the predominant class of the total A. herba-alba EO.•A. herba-alba essential oil may be a source of new botanical fumigants against the fifth-instar codling moth.
Aromatic and medicinal plants are large producers of secondary metabolites. Drylands of North Africa are characterized by high species richness of aromatic and medicinal plants which are still used ...by local populations in traditional medicine and culinary. The study aimed at characterizing the volatile organic compounds (VOC) of six wild plant species (Thymus algeriensis L., Artemisia campestris L., Juniperus phoenicea L., Teucrium polium L., Artemisia herba-alba Asso. and Rosmarinus officinalis L.) growing in arid regions of Algeria. This survey compared VOC composition between plants through the analysis of quantitative and qualitative similarity in order to detect the species that have more VOC, and also uncover the dominant VOC of each species for subsequent potential use in various fields such as the industry of food, cosmetics, therapeutics, etc. The micro-extraction of VOC was carried out using headspace-solid phase microextraction (HS-SPME) method whereas Gas chromatography–mass spectrometry (GC–MS) identified a total of 91 VOC: 39 VOC were identified in T. algeriensis (with dominance of β-myrcene = 13.78%, camphor = 12.29%, linalyl acetate = 9.11%); 37 VOC in A. campestris (β-farnesene = 14.17%, β-myrcene = 13.84%); 50 VOC in J. phoenicea (α-pinene = 27.18%); 42 VOC in T. polium (α-guaiene = 11.33%, trans-caryophyllene = 9.49%, γ-elemene = 9.25%), 45 VOC in R. officinalis (camphor = 17.46%, trans-caryophyllene = 14.83%); and 41 in A. herba-alba (α-thujone = 24.59%, β-thujone = 13.73%). The analysis of similarity revealed three different groups of species: the first group comprised T. algeriensis, R. officinalis, J. phoenicea and A. campestris, the second and third groups included one species, T. polium and A. herba-alba, respectively. VOC composition in A. herba-alba largely differed of other species. The screened species presented high VOC diversity, which indicates that ecological conditions of drylands incite plants to produce secondary metabolites that can be exploited for various purposes.
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•Volatile organic compounds (VOC) of six wild plants from N African drylands were characterized.•Using HS-SPME and GC–MS, 91 VOC were identified from stems, leaves, flowers and fruits of the 6 plants species.•Nº of VOC: T. algeriensis = 39, A. campestris = 37, J. phoenicea = 50, T. polium = 42, R. officinalis = 35, A. herba-alba = 41.•T. algeriensis, R. officinalis, J. phoenicea and A. campestris have similar VOC composition.•A. herba-alba, inversely to T. algeriensis, recorded the lowest levels of similarities with other plants.
In this study, two kinds of Artemisia plant,
Artemisia campestris
L. and
Artemisia herba-alba
Asso
.
, collected from different locations in Djelfa province, Algeria, were subjected to an ...instrumental neutron activation analysis (INAA) in order to determine their essential and toxic elements for the first time. The obtained results for both types revealed the existence of twenty-one elements, namely, As, Ba, Br, Ca, Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Na, Rb, Sb, Sc, Sm, Sr, Yb, and Zn, where, the elements K, Ca, Fe, and Na respectively showed a significant concentration. On the other hand, the tolerable daily intake (TDI) of the studied plants for an adult person per day was within the tolerance limits imposed by the World Health Organization (WHO). Hence, these findings might therefore be used to offer scientific basis for an optimum usage of the studied plants and so enriches the database of medicinal herbs.
The development of eco-friendly and effective insecticides is crucial for public health worldwide. Herein, we focused on the desert wormwood (Artemisia herba-alba), a plant widely used in Arabian ...traditional medicine, as a source of green nanoinsecticides against mosquito vectors, as well as growth inhibitors to be employed against microbial pathogens. Ag nanoparticles (AgNPs) fabricated with the A. herba-alba extract were tested on Indian and Saudi Arabian strains of Anopheles, Aedes and Culex mosquitoes. The chemical profile of the A. herba-alba extract was determined by LC-DAD-MS and 1H NMR studies. Then, AgNPs were studied using UV–vis spectroscopy, XRD, FTIR spectroscopy, TEM, and EDX analyses. Artemisia herba-alba-synthesized AgNPs showed high larvicidal toxicity against mosquitoes from both Indian and Saudi Arabian strains. LC50 of AgNPs against Indian strains was 9.76 μg/ml for An. stephensi, 10.70 μg/ml for Ae. aegypti and 11.43 μg/ml for Cx. quinquefasciatus, whereas against Saudi Arabian strains it was 33.58 μg/ml for Ae. aegypti and 38.06 μg/ml for Cx. pipiens. In adulticidal experiments, A. herba-alba extract showed LC50 ranging from 293.02 to 450 μg/ml, while AgNP LC50 ranged from 8.22 to 27.39 μg/ml. Further, low doses of the AgNPs inhibited the growth of selected microbial pathogens. Overall, A. herba-alba can be further considered as a source of phytochemicals, with special reference to saponins, for effective and prompt fabrication of AgNPs with relevant insecticidal and bactericidal activity against species of high public health importance.
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•We tested Artemisia herba-alba as a source of insecticidal nanosilver (AgNPs).•Extract was studied by LC-DAD-MS + 1H NMR, AgNPs were studied by UV–vis, FTIR, TEM, XRD, EDX.•The extract and AgNPs were tested on Indian and Saudi Arabian strains of Anopheles, Aedes and Culex mosquitoes.•AgNP larvicidal LC50 < 40 μg/ml for all tested species; in adulticidal tests LC50 were 8.22–27.391 μg/ml.•Low doses of AgNPs inhibited the growth of selected microbial pathogens
The main objective of this study is to highlight the dietary risk of the prevalence of bla
ESBL
producing multidrug-resistant Enterobacteriaceae in raw milk, besides evaluating the effect of ...Artemesia herba-alba and Thymus algeriensis essential oils against bla
ESBL
producing Enterobacteriaceae isolates from raw milk. Isolation and molecular identification of ESBL producing Enterobacteriaceae and bla
TEM
, bla
SHV
, bla
CTX-M
genes encoding resistance were investigated by PCR and sequencing. The chemical composition of oils was effectuated by GC/MS. Antibacterial activity was tested by disc diffusion and microdilution methods. Six ceftazidime-resistant Enterobacteriaceae were identified; four of them were confirmed as ESBL producers and were found to be multi-drug resistant. bla
SHV
and bla
TEM
were found to be having the most dominant gene encoding resistance. The results of GC/MS analysis bestowed 31 and 35 compounds for A. herba-alba and T. algeriensis respectively. Klebsiella pneumonia SB6 (17.04 mm for A. herba-alba and 16.22 mm for T. algeriensis) revealed the highest zones of inhibition. MIC values were 1.56-12.5 mg/mL for both essential oils, while the MBC values were 6.25-25 mg/mL (A. herba-alba) and 12.5-25 mg/mL (T. algeriensis).
Artemisia alba
Turra is an essential oil bearing plant, with Euro-Mediterranean and Southeastern European distribution. One of the distinctive characteristics of its essential oil is the ...variability of its terpenoid profile due to environmental, genetic and other factors. In the present work, tissue culture experiment has provided a model system of
in vitro
morphogenesis alteration
.
Auxin and cytokinin treatments were applied alone or in different combinations, leading to the development of directly rooting and root suppressed
in vitro
plantlets. Direct
in vitro
rooting was definitely related to obtaining biomass richest in flavonoid compounds (irrespectively of the PGR combination leading to obtaining this morphotype). The directly rooting morphotype was also distinguished by the highest flavones/flavonoles ratio as compared with the
in situ
and the rest of the
in vitro
samples. Underground parts of
in vitro
samples were shown to be significantly richer in caffeoylquinic acids as compared with aerial parts. An elevation of DCQA/CQA ratios in PGR treated plants as compared with the non-treated control could be estimated as an indication of stimulation of the esterification process with the purpose of coping with the stress of the impairment of the physiological state of normal shoot-to-root tissue formation. It was shown that
in vitro
morphogenesis moderation could be applied as a simple and reproducible protocol to alter polyphenolics production in tissue cultures of this plant species.
Key message
in vitro
culture system of
Artemisia alba
Turra allowed for its morphogenesis modification. Changes in root system development and callusogenesis were related to targeted alterations of flavones/flavonols ratios and esterification degree of caffeoylquinic acids.
Graphical Abstract
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