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Auteur Chaabane Rahmoune |
Documents disponibles écrits par cet auteur (11)
Affiner la recherche Interroger des sources externesCaractérisation de l’arganier (Argania spinosa L.) en Algérie et impact de la salinité / Mohamed Seif Allah Kechebar
Titre : Caractérisation de l’arganier (Argania spinosa L.) en Algérie et impact de la salinité Type de document : texte imprimé Auteurs : Mohamed Seif Allah Kechebar, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 209 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Argania spinosa Tindouf cartographie structure huile d’argan phénols mapping argan oil phenols شجرة الأركان:تندوف علم الخرائط بنية زيت الأركان فينول Index. décimale : 570 Sciences de la vie. Biologie Résumé : Through this work, we mapped the range of the argan tree in Algeria, studied stand structure, characterized argan oil and assess the impact of soil salinity on secondary metabolites (phenolic compounds). The main results showed that the argan tree covers an area of 96940 ha spread over two main perimeters where the altitude ranging from 315 to 630 m.
Stands are widely dispersed with an average height of 3 to 6 m and a surface crown between
24 and 68m2. Argan oil is a fine virgin oil, rich in linoleic acid (35%) and β-sitosterol (64%), characterized by low chlorophyll content (1.3 mg Pheophytin / kg oil) and low specific
extinction coefficient (K232 = 1.15). Results also showed that the argan tree can support very
salty soils (4.35 to 8.5 millimhos / cm) with an important accumulation of phenolic compounds (77.28 mg GAE g-1MS) as an adaptive response to salt stress. Qualitative analysis by LC-ESI-MS of phenolic compounds found that certain molecules appear under the effect of salt and other disappears when salinity becomes extreme. The study of antioxidant activities confirmed all these results and we have noted the best activities for the plant extracts from very salty soil. The present work has provided scientific information about the argan which inciting to preserve, develop and promote it in a vision of sustainable development.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/KEC6896.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10225 Caractérisation de l’arganier (Argania spinosa L.) en Algérie et impact de la salinité [texte imprimé] / Mohamed Seif Allah Kechebar, Auteur ; Chaabane Rahmoune, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2016 . - 209 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Argania spinosa Tindouf cartographie structure huile d’argan phénols mapping argan oil phenols شجرة الأركان:تندوف علم الخرائط بنية زيت الأركان فينول Index. décimale : 570 Sciences de la vie. Biologie Résumé : Through this work, we mapped the range of the argan tree in Algeria, studied stand structure, characterized argan oil and assess the impact of soil salinity on secondary metabolites (phenolic compounds). The main results showed that the argan tree covers an area of 96940 ha spread over two main perimeters where the altitude ranging from 315 to 630 m.
Stands are widely dispersed with an average height of 3 to 6 m and a surface crown between
24 and 68m2. Argan oil is a fine virgin oil, rich in linoleic acid (35%) and β-sitosterol (64%), characterized by low chlorophyll content (1.3 mg Pheophytin / kg oil) and low specific
extinction coefficient (K232 = 1.15). Results also showed that the argan tree can support very
salty soils (4.35 to 8.5 millimhos / cm) with an important accumulation of phenolic compounds (77.28 mg GAE g-1MS) as an adaptive response to salt stress. Qualitative analysis by LC-ESI-MS of phenolic compounds found that certain molecules appear under the effect of salt and other disappears when salinity becomes extreme. The study of antioxidant activities confirmed all these results and we have noted the best activities for the plant extracts from very salty soil. The present work has provided scientific information about the argan which inciting to preserve, develop and promote it in a vision of sustainable development.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/KEC6896.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10225 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KEC/6896 KEC/6896 Thèse Bibliothèque principale Thèses Disponible
Titre : Comportement écophysiologique de deux chénopodiacées des genres Atriplex et Spinacia soumises au stress salin. Type de document : texte imprimé Auteurs : Imane Bouchoukh, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2010 Importance : 112 f. Format : 31 cm Note générale : 01 Disponible à la salle de recherche 01 Disponible au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie végétale:Ecophysiologie et biotechnologie végétale Salinité Atriplex halimus Atriplex canescens Spinacia oleracea , longueur
tige longueur racine biomasse Chlorophylles proline sucres solubles ADN SDS-PAGE protéines Salinity length stem length root dry weight Chlorophylls sugars soluble DNA proteins الملوحة طول الساق طول الجذر الكتلة الحيوية الجافة الكلوروفيل البرولين البروتينات السكرياتIndex. décimale : 570 Sciences de la vie. Biologie Résumé : In arid and semi-arid areas, particularly around the Mediterranean Basin, soil salinisation is one of the major abiotic factors which reduce the yield of several cultures. The introduction of tolerant plants to salinity is one of the techniques most used to improve the quality of soil in these areas. Chenopodiaceae constitute a very important family of halophyts, of which are genus Atriplex and Spinacia.
To highlight the potentialities of adaptation to the salinity of Atriplex halimus L, Atriplex canescens L and two varieties of spinach: Spinacia oleracea L., a saline stress was induced by the application of various NaCl doses (0g/l, 6g/l, 12g/l, 18g/l and 24g/l), in semi-controlled conditions.
The tolerance of these genotypes was studied by the capacity of growth and output. Indeed, the average height of the stems, the length of roots and the dry weight at the end of the experiment vary according to the level of saline stress. The two species of Atriplex showed a great resistance to the salinity expressed by their development of important shoots and roots. The two varieties of spinach present a growth adapted to the saline stress, but the introduced variety (Linda) is shown to be more sensitive than the local variety (GSN).The study of the growth of the plants was supplemented by DNA dosage and chlorophylls (A), (b) and (a+b); these two parameters reflect the mitotic and photosynthetic activities respectively.
The accumulation of osmoregulators varies from one species another, namely the free
proline and soluble sugars. Atriplex and spinach accumulate proline in shoots and roots. As for soluble sugars, they are accumulated according to salinity only at the two species of Atriplex. The comparison of the SDS-PAGE profiles of the protein leaves reveals 7 proteins which appear in stress, of a molecular weight of 190, 185, 158, 136, 127.5, 27 and 12 KDa, whose presence and degree of accumulation vary from one genotype to another.Note de contenu : Annexes. Diplôme : Magistère En ligne : ../theses/biologie/BOU5700.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=1795 Comportement écophysiologique de deux chénopodiacées des genres Atriplex et Spinacia soumises au stress salin. [texte imprimé] / Imane Bouchoukh, Auteur ; Chaabane Rahmoune, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2010 . - 112 f. ; 31 cm.
01 Disponible à la salle de recherche 01 Disponible au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie végétale:Ecophysiologie et biotechnologie végétale Salinité Atriplex halimus Atriplex canescens Spinacia oleracea , longueur
tige longueur racine biomasse Chlorophylles proline sucres solubles ADN SDS-PAGE protéines Salinity length stem length root dry weight Chlorophylls sugars soluble DNA proteins الملوحة طول الساق طول الجذر الكتلة الحيوية الجافة الكلوروفيل البرولين البروتينات السكرياتIndex. décimale : 570 Sciences de la vie. Biologie Résumé : In arid and semi-arid areas, particularly around the Mediterranean Basin, soil salinisation is one of the major abiotic factors which reduce the yield of several cultures. The introduction of tolerant plants to salinity is one of the techniques most used to improve the quality of soil in these areas. Chenopodiaceae constitute a very important family of halophyts, of which are genus Atriplex and Spinacia.
To highlight the potentialities of adaptation to the salinity of Atriplex halimus L, Atriplex canescens L and two varieties of spinach: Spinacia oleracea L., a saline stress was induced by the application of various NaCl doses (0g/l, 6g/l, 12g/l, 18g/l and 24g/l), in semi-controlled conditions.
The tolerance of these genotypes was studied by the capacity of growth and output. Indeed, the average height of the stems, the length of roots and the dry weight at the end of the experiment vary according to the level of saline stress. The two species of Atriplex showed a great resistance to the salinity expressed by their development of important shoots and roots. The two varieties of spinach present a growth adapted to the saline stress, but the introduced variety (Linda) is shown to be more sensitive than the local variety (GSN).The study of the growth of the plants was supplemented by DNA dosage and chlorophylls (A), (b) and (a+b); these two parameters reflect the mitotic and photosynthetic activities respectively.
The accumulation of osmoregulators varies from one species another, namely the free
proline and soluble sugars. Atriplex and spinach accumulate proline in shoots and roots. As for soluble sugars, they are accumulated according to salinity only at the two species of Atriplex. The comparison of the SDS-PAGE profiles of the protein leaves reveals 7 proteins which appear in stress, of a molecular weight of 190, 185, 158, 136, 127.5, 27 and 12 KDa, whose presence and degree of accumulation vary from one genotype to another.Note de contenu : Annexes. Diplôme : Magistère En ligne : ../theses/biologie/BOU5700.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=1795 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/5700 BOU/5700 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l'étude de l'action d'agents polluants sur des végétaux bioindicateurs Type de document : texte imprimé Auteurs : Saida Zaimeche, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 173 f. Format : 30 cm. Note générale : 2 copies imprimes disponibles Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Ecotoxicologie pollution des écosystèmes Metallic elements Bioaccumulation Chlorella sp. Lemna minor Phragmites communis Typha latifolia Physiologic and BioChimical parameters المعادن التراكم العوامل الفزيولوجية و البيوكميائية Index. décimale : 570 Sciences de la vie. Biologie Résumé : The aim of this study could put in evidence the parameters determined the
contamination of water course of the locality of Oued Athmenia with elements traces
metallic and evaluated their potential effects on aquatic vegetable species.
Four aquatic species; unicellular alga Chlorella sp. and macrophytes floating as well as
emergent plants (Lemna minor, phragmites communis and Typha latifolia) were
examined for their bioaccumulation of metallic elements.
Beside this multitude of pollutants rejected in the environment, this species could or not
adapted and therefore responded to the presence of these contaminants? Specially, that
these contaminants can enter in competition with some ions necessary for their essential
metabolites and replaced them at the active sites of several enzymes, which could cause
decreased performance energetic, significant disturbance in their physiological and
biochemical functioning.
In the other hand, during this experimentation, the duck weed Lemna minor was more
sensitive to the environment stress by the decline of their biomass, especially in the
stations localized downstream.
Chlorella sp. first link of the food chain, without root can be preserved of the influence
of the substratum can reflected the quality of water course.
Phragmites communis and Typha latifolia were demonstrated their capacity to
accumulate high contents of these elements, but apparition of morphological (visual)
symptoms of clorosis on above ground part.
Finally, these species take into consideration in this study could give overall assessment
of the quality of these water courses and the bioaccumulation of these elements in their
organisms was an index of pollution. Beside this, these species were demonstrated their
capacity to accumulate and to remove pollutants from this aquatic environment it’s very
important to preserve this aquatic flora, seeing their function in this environment.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/ZAI6847.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10144 Contribution à l'étude de l'action d'agents polluants sur des végétaux bioindicateurs [texte imprimé] / Saida Zaimeche, Auteur ; Chaabane Rahmoune, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2015 . - 173 f. ; 30 cm.
2 copies imprimes disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Ecotoxicologie pollution des écosystèmes Metallic elements Bioaccumulation Chlorella sp. Lemna minor Phragmites communis Typha latifolia Physiologic and BioChimical parameters المعادن التراكم العوامل الفزيولوجية و البيوكميائية Index. décimale : 570 Sciences de la vie. Biologie Résumé : The aim of this study could put in evidence the parameters determined the
contamination of water course of the locality of Oued Athmenia with elements traces
metallic and evaluated their potential effects on aquatic vegetable species.
Four aquatic species; unicellular alga Chlorella sp. and macrophytes floating as well as
emergent plants (Lemna minor, phragmites communis and Typha latifolia) were
examined for their bioaccumulation of metallic elements.
Beside this multitude of pollutants rejected in the environment, this species could or not
adapted and therefore responded to the presence of these contaminants? Specially, that
these contaminants can enter in competition with some ions necessary for their essential
metabolites and replaced them at the active sites of several enzymes, which could cause
decreased performance energetic, significant disturbance in their physiological and
biochemical functioning.
In the other hand, during this experimentation, the duck weed Lemna minor was more
sensitive to the environment stress by the decline of their biomass, especially in the
stations localized downstream.
Chlorella sp. first link of the food chain, without root can be preserved of the influence
of the substratum can reflected the quality of water course.
Phragmites communis and Typha latifolia were demonstrated their capacity to
accumulate high contents of these elements, but apparition of morphological (visual)
symptoms of clorosis on above ground part.
Finally, these species take into consideration in this study could give overall assessment
of the quality of these water courses and the bioaccumulation of these elements in their
organisms was an index of pollution. Beside this, these species were demonstrated their
capacity to accumulate and to remove pollutants from this aquatic environment it’s very
important to preserve this aquatic flora, seeing their function in this environment.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/ZAI6847.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10144 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZAI/6847 ZAI/6847 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution a l’étude des caractères morphologiques, physiologiques et des marqueurs moléculaires pour l'évaluation du polymorphisme phénotypique et génétique des espèces du genre Tamarix dans différents écotopes de la zone steppique de KHENCHELA (EST ALGERIEN) Type de document : texte imprimé Auteurs : Abdelhamid Khabtane, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2015 Importance : 196 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Ecophysiologie et biotechnologie végétale Tamarix polymorphisme marqueur PCR-SSR métabolites primaires métabolites secondaires zone steppique Khenchela polymorphism PCR-SSR marquer primary and secondary metabolites steppe zone, KHENCHELA"
الأثل التعدد النمطً الواسم SSR-PCR مركبات الأٌض الأولٌة و الثانوٌة المنطقة السهبٌة خنشلةIndex. décimale : 570 Sciences de la vie. Biologie Résumé : In this work we have tried to put the accent on morphological, physiological and molecular markers for the evaluation of phenotypic and genetic polymorphism in the genus of Tamarix in different ecotopes of the steppe zone in KHENCHELA (Eastern Algeria) where such genus had an important interest in the rehabilitation of degraded ecosystems.
The study's sites are selected according to a north-south transect across the region where soil, orographic and climatic characteristics are very different Geological, and soil study indicate that the species of the genus of Tamarix holds in different areas, generally alkaline and saline substrates, in a semi-arid and desert climate.
The literature review has shown that the genus of Tamarix have a very important reproductive potential, with a root system very suitable for water deficit conditions with a large capacity and it is used in traditional medicine and in modern medicine in Europe.
The flora and morphometric analysis allows us to consider the floristic richness of Tamarix group and advance certain assumptions in relation to the environment.
In terms of resistance to salinity The results are significant; where the cuttings of Tamarix sp. continued to grow even at a dose of 64g / l of NaCl.
Regarding the results of statistical analysis by ANOVA, shows that there is no significance between the effect of salt dose and the accumulation of proline.
The results of the study of primary metabolites, secondary metabolites and the antimicrobial activity revealed a highly significant effect of the environment on their quantity and quality.
The study of genetic polymorphism in species of the genus of Tamarix, using molecular marker PCR-SSR type showed that the accessions studied are genetically very distant because in most cases the dissimilarity coefficients are greater than 50% which explains the large genetic polymorphism between and within species in the genus of Tamarix.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/KHA6734.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9889 Contribution a l’étude des caractères morphologiques, physiologiques et des marqueurs moléculaires pour l'évaluation du polymorphisme phénotypique et génétique des espèces du genre Tamarix dans différents écotopes de la zone steppique de KHENCHELA (EST ALGERIEN) [texte imprimé] / Abdelhamid Khabtane, Auteur ; Chaabane Rahmoune, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2015 . - 196 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Ecophysiologie et biotechnologie végétale Tamarix polymorphisme marqueur PCR-SSR métabolites primaires métabolites secondaires zone steppique Khenchela polymorphism PCR-SSR marquer primary and secondary metabolites steppe zone, KHENCHELA"
الأثل التعدد النمطً الواسم SSR-PCR مركبات الأٌض الأولٌة و الثانوٌة المنطقة السهبٌة خنشلةIndex. décimale : 570 Sciences de la vie. Biologie Résumé : In this work we have tried to put the accent on morphological, physiological and molecular markers for the evaluation of phenotypic and genetic polymorphism in the genus of Tamarix in different ecotopes of the steppe zone in KHENCHELA (Eastern Algeria) where such genus had an important interest in the rehabilitation of degraded ecosystems.
The study's sites are selected according to a north-south transect across the region where soil, orographic and climatic characteristics are very different Geological, and soil study indicate that the species of the genus of Tamarix holds in different areas, generally alkaline and saline substrates, in a semi-arid and desert climate.
The literature review has shown that the genus of Tamarix have a very important reproductive potential, with a root system very suitable for water deficit conditions with a large capacity and it is used in traditional medicine and in modern medicine in Europe.
The flora and morphometric analysis allows us to consider the floristic richness of Tamarix group and advance certain assumptions in relation to the environment.
In terms of resistance to salinity The results are significant; where the cuttings of Tamarix sp. continued to grow even at a dose of 64g / l of NaCl.
Regarding the results of statistical analysis by ANOVA, shows that there is no significance between the effect of salt dose and the accumulation of proline.
The results of the study of primary metabolites, secondary metabolites and the antimicrobial activity revealed a highly significant effect of the environment on their quantity and quality.
The study of genetic polymorphism in species of the genus of Tamarix, using molecular marker PCR-SSR type showed that the accessions studied are genetically very distant because in most cases the dissimilarity coefficients are greater than 50% which explains the large genetic polymorphism between and within species in the genus of Tamarix.
Diplôme : Doctorat en sciences En ligne : ../theses/biologie/KHA6734.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9889 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHA/6734 KHA/6734 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude écophysiologique, développement et importance des plantes médicinales du genre Mentha dans le Parc National d’El-Kala (Nord-Est Algérie). Type de document : texte imprimé Auteurs : Amina Benabdallah, Auteur ; Chaabane Rahmoune, Directeur de thèse Importance : 152 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : M. aquatica M. arvensis Mx piperita M.pulegium M. rotundifolia M. x villosa NPEK ElKala RAMSAR phenols flavonoids tannins essential oil antioxidant acetylcholinesterase PNEK phénols, flavonoïdes, huile essentielle antioxydant acétylcholinestérase Index. décimale : 570 Sciences de la vie. Biologie Résumé : Mentha species are widely used by native habitants of El-Tarf region, as condiment, flavor or
herb in culinary preparations but also used for therapeutic properties as carminative, sedative,
antispasmodic and well known to treat stomach pain.
The aim of this work was first to inventory and geolocalisate Mentha species of the National
Park of El-Kala and then to investigate the total phenolics, flavonoids and tannins content and
the in-vitro antioxidant activities of methanolic extracts and essential oils, then to evaluate the
chemical composition of essential oils obtained from aerial parts of six wildMentha species:
M. aquatica, M. arvensis, M x piperita, M. pulegium, M. rotundifolia and M x villosa.
Chemical composition was analyzed by GC-MS method and biological activities investigated
by DPPH, B-carotene bleaching and ion chelating assays for the antioxidant activity, as well
as the inhibition of acetycholinesterase. The methanol extracts of mints were rich in phenolic
compounds and exhibited a powerful antioxidant activity ranged from7.5µg/mlto44.66
µg/ml,which varied significantly among species. M. aquatica stands out with an efficient
antioxidant ability which is correlated to the high total phenolics contents, followed by M.
arvensis and M. piperita with very close values, comparing to M. pulegium, M. rotundifolia
and M. villosa with lowest values. Qualitative and quantitative variations were observed
among species. The highest yield of oils, obtained by hydrodistillation, was recorded for M.
pulegium with 1.8%. A total of 27 compounds were identified with the predominance of
oxygenated monoterpenes such as menthofurane (73.38%), rotundifolone (65.99%), pulegone
(59.12%), menthol (49.89%), menthone (20.84%), neomenthol (20.76%), 1.8-cineol (18.16%)
and β-caryophyllene (12.55%). In general, M. aquatica exhibited the strongest antioxidant
level with IC50 of 0.69±0.06 mg/ml assessed by DPPH assay, 0.16±0.02 mg/ml by β-Carotene
bleaching and 1.73±0.17 mg/ml by ferrous ion chelating method. Whereas M. arvensisstood
out with IC50 of 27.5mg/ml for acetylcholinesterase inhibitory.These results show that Mentha
species from NPEK have a great potential of polyphenols which can be used as a natural food
preservative and antioxidant source. Moreover, mints could be exploited for their
pharmacological application in order to prevent induced diseases relied to oxidative stress.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/BEN7087.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10514 Etude écophysiologique, développement et importance des plantes médicinales du genre Mentha dans le Parc National d’El-Kala (Nord-Est Algérie). [texte imprimé] / Amina Benabdallah, Auteur ; Chaabane Rahmoune, Directeur de thèse . - [s.d.] . - 152 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : M. aquatica M. arvensis Mx piperita M.pulegium M. rotundifolia M. x villosa NPEK ElKala RAMSAR phenols flavonoids tannins essential oil antioxidant acetylcholinesterase PNEK phénols, flavonoïdes, huile essentielle antioxydant acétylcholinestérase Index. décimale : 570 Sciences de la vie. Biologie Résumé : Mentha species are widely used by native habitants of El-Tarf region, as condiment, flavor or
herb in culinary preparations but also used for therapeutic properties as carminative, sedative,
antispasmodic and well known to treat stomach pain.
The aim of this work was first to inventory and geolocalisate Mentha species of the National
Park of El-Kala and then to investigate the total phenolics, flavonoids and tannins content and
the in-vitro antioxidant activities of methanolic extracts and essential oils, then to evaluate the
chemical composition of essential oils obtained from aerial parts of six wildMentha species:
M. aquatica, M. arvensis, M x piperita, M. pulegium, M. rotundifolia and M x villosa.
Chemical composition was analyzed by GC-MS method and biological activities investigated
by DPPH, B-carotene bleaching and ion chelating assays for the antioxidant activity, as well
as the inhibition of acetycholinesterase. The methanol extracts of mints were rich in phenolic
compounds and exhibited a powerful antioxidant activity ranged from7.5µg/mlto44.66
µg/ml,which varied significantly among species. M. aquatica stands out with an efficient
antioxidant ability which is correlated to the high total phenolics contents, followed by M.
arvensis and M. piperita with very close values, comparing to M. pulegium, M. rotundifolia
and M. villosa with lowest values. Qualitative and quantitative variations were observed
among species. The highest yield of oils, obtained by hydrodistillation, was recorded for M.
pulegium with 1.8%. A total of 27 compounds were identified with the predominance of
oxygenated monoterpenes such as menthofurane (73.38%), rotundifolone (65.99%), pulegone
(59.12%), menthol (49.89%), menthone (20.84%), neomenthol (20.76%), 1.8-cineol (18.16%)
and β-caryophyllene (12.55%). In general, M. aquatica exhibited the strongest antioxidant
level with IC50 of 0.69±0.06 mg/ml assessed by DPPH assay, 0.16±0.02 mg/ml by β-Carotene
bleaching and 1.73±0.17 mg/ml by ferrous ion chelating method. Whereas M. arvensisstood
out with IC50 of 27.5mg/ml for acetylcholinesterase inhibitory.These results show that Mentha
species from NPEK have a great potential of polyphenols which can be used as a natural food
preservative and antioxidant source. Moreover, mints could be exploited for their
pharmacological application in order to prevent induced diseases relied to oxidative stress.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/BEN7087.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10514 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEN/7087 BEN/7087 Thèse Bibliothèque principale Thèses Disponible Permalink
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