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Partager le résultat de cette recherche Interroger des sources externesAdaptation à la sécheresse chez le blé dur (Triticum durumDesf.) Contribution de quelques solutés à l'ajustement osmotique. / Meriem Zoghmar
Titre : Adaptation à la sécheresse chez le blé dur (Triticum durumDesf.) Contribution de quelques solutés à l'ajustement osmotique. : Cas des Sucres solubles, Proline, Potassium et Nitrates. Type de document : texte imprimé Auteurs : Meriem Zoghmar, Auteur ; Youcef Kara, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 259 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie Végétale(Biodiversité et Production Végétale) Blé dur adaptation teneur relative en eau proline sucres solubles ajustement osmotique potassium nitrate nombre de racines principales et rendement potentiel Durum wheat relative water content soluble sugars osmotic adjustment number of main roots and potential yield القمح الصلب التأقلم المحتوى النسبي المائي البرولين السكريات الذوابة الضغط الاسموزي البوتاسيوم النترات عدد الجذور الرئيسية المردود Index. décimale : 570 Sciences de la vie. Biologie Résumé :
Various morpho-physiological, biochemical and phonological features related to water stress tolerance (leaf area, osmotic adjustment, osmotic accumulation, root traits and date to heading) were studied in ten genotypes of durum wheat (Triticum durum Desf.) with contrasting agronomic behaviour. Significant variations between the tested genotypes were observed mainly for the relative water content, osmotic potential and the various osmoticums analysed at the symplasmic level indicating that their behaviour with respect to these osmoticums is significantly different from a degree of stress to another. The relationships between these traits and the adaptation strategies developed by each variety have been described. The classification of the genotypes studied according to their sensitivity to water stress indicates that the Cirta, Boussellam, Mohamed Ben Bachir, Bidi 17 and Wahbi genotypes have a long grain filling time, high relative water content (RWC) and are therefore efficient and tolerant to water stress. Varieties that have shown sensitivity to stress are therefore not very productive, just like the Sémito variety. This observation leads us to conclude that tolerance and great capacity of osmotic adjustment are consubstantial. Other results highlight significant negative correlations between nitrate and proline content and thus showing the probable existence of a connection between the proline biosynthesis pathway and nitrate uptake. Close relations have been observed essentially between osmotic adjustment, soluble sugar content and proline. This suggests that the osmoticum that contributes most to osmotic adjustment in order of preference are soluble sugars, proline, potassium and to a lesser degree nitrates. In case of stress, the biochemical response evaluated through the process of accumulation of proline and soluble sugars varieties (Waha, Bousselam, Mohamed Ben Bashir, Cirta and Bidi17) under water stress has proved to be a criterion of effective
adaptation. Correlations between osmotic adjustment capacity and yield show the reliable role of osmotic adjustment in water deficit tolerance. The results obtained in the fields reveal the existence of high performance, low productivity and non-performing genotypes. The duration of heading allowed classifying the early and late genotypes.Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/ZOG7535.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11375 Adaptation à la sécheresse chez le blé dur (Triticum durumDesf.) Contribution de quelques solutés à l'ajustement osmotique. : Cas des Sucres solubles, Proline, Potassium et Nitrates. [texte imprimé] / Meriem Zoghmar, Auteur ; Youcef Kara, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2019 . - 259 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale: Ecologie Végétale(Biodiversité et Production Végétale) Blé dur adaptation teneur relative en eau proline sucres solubles ajustement osmotique potassium nitrate nombre de racines principales et rendement potentiel Durum wheat relative water content soluble sugars osmotic adjustment number of main roots and potential yield القمح الصلب التأقلم المحتوى النسبي المائي البرولين السكريات الذوابة الضغط الاسموزي البوتاسيوم النترات عدد الجذور الرئيسية المردود Index. décimale : 570 Sciences de la vie. Biologie Résumé :
Various morpho-physiological, biochemical and phonological features related to water stress tolerance (leaf area, osmotic adjustment, osmotic accumulation, root traits and date to heading) were studied in ten genotypes of durum wheat (Triticum durum Desf.) with contrasting agronomic behaviour. Significant variations between the tested genotypes were observed mainly for the relative water content, osmotic potential and the various osmoticums analysed at the symplasmic level indicating that their behaviour with respect to these osmoticums is significantly different from a degree of stress to another. The relationships between these traits and the adaptation strategies developed by each variety have been described. The classification of the genotypes studied according to their sensitivity to water stress indicates that the Cirta, Boussellam, Mohamed Ben Bachir, Bidi 17 and Wahbi genotypes have a long grain filling time, high relative water content (RWC) and are therefore efficient and tolerant to water stress. Varieties that have shown sensitivity to stress are therefore not very productive, just like the Sémito variety. This observation leads us to conclude that tolerance and great capacity of osmotic adjustment are consubstantial. Other results highlight significant negative correlations between nitrate and proline content and thus showing the probable existence of a connection between the proline biosynthesis pathway and nitrate uptake. Close relations have been observed essentially between osmotic adjustment, soluble sugar content and proline. This suggests that the osmoticum that contributes most to osmotic adjustment in order of preference are soluble sugars, proline, potassium and to a lesser degree nitrates. In case of stress, the biochemical response evaluated through the process of accumulation of proline and soluble sugars varieties (Waha, Bousselam, Mohamed Ben Bashir, Cirta and Bidi17) under water stress has proved to be a criterion of effective
adaptation. Correlations between osmotic adjustment capacity and yield show the reliable role of osmotic adjustment in water deficit tolerance. The results obtained in the fields reveal the existence of high performance, low productivity and non-performing genotypes. The duration of heading allowed classifying the early and late genotypes.Note de contenu :
Annexes.Diplôme : Doctorat en sciences En ligne : ../theses/biologie/ZOG7535.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11375 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité ZOG/7535 ZOG/7535 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l'étude des nitrates de cobalt , de nickel et de zinc entre +25 et - 180 °C Type de document : texte imprimé Auteurs : Renée-Paulette Pouillen ; Dubois, Directeur de thèse ; Uniersité de Clermont-Ferrand, Éditeur scientifique Année de publication : 1965 Importance : 165 f. Note générale : 01 Disponible au magazin de la B.U.C. Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Zinc Nickel Cobalt Nitrate Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3884 Contribution à l'étude des nitrates de cobalt , de nickel et de zinc entre +25 et - 180 °C [texte imprimé] / Renée-Paulette Pouillen ; Dubois, Directeur de thèse ; Uniersité de Clermont-Ferrand, Éditeur scientifique . - 1965 . - 165 f.
01 Disponible au magazin de la B.U.C.
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Zinc Nickel Cobalt Nitrate Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=3884 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité POU/566 POU/566 Thèse Bibliothèque principale Thèses Disponible
Titre : Electrode sensitive à membrane liquide : sensibilité, intervale de réponse et évaluation des nitrates dans les eaux de consommation Type de document : texte imprimé Auteurs : Amor Meziani ; Univ. de Constantine, Éditeur scientifique ; A. Gaid, Directeur de thèse Année de publication : 1996 Importance : 109 f. Note générale : 03 Disponibles au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Eau Electrode Nitrate Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4249 Electrode sensitive à membrane liquide : sensibilité, intervale de réponse et évaluation des nitrates dans les eaux de consommation [texte imprimé] / Amor Meziani ; Univ. de Constantine, Éditeur scientifique ; A. Gaid, Directeur de thèse . - 1996 . - 109 f.
03 Disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Eau Electrode Nitrate Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4249 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MEZ/2891 MEZ/2891 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude photochimique des crésols par excitation des ions nitrate et nitrite en solution aqueuse Type de document : texte imprimé Auteurs : Sofia Kouras ; Univ. de Constantine, Éditeur scientifique ; A. Zertal, Directeur de thèse Année de publication : 2003 Importance : 86 f. Note générale : 1 disponible dans la salle de recherche
2 disponibles au magasin de la bibliothèque centraleLangues : Français (fre) Catégories : Français - Anglais
ChimieTags : O-crésol Nitrate Radicaux hydroxyle Nitrite Réaction photo induite Oxydes d'azote Rayonnement UV Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4058 Etude photochimique des crésols par excitation des ions nitrate et nitrite en solution aqueuse [texte imprimé] / Sofia Kouras ; Univ. de Constantine, Éditeur scientifique ; A. Zertal, Directeur de thèse . - 2003 . - 86 f.
1 disponible dans la salle de recherche
2 disponibles au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : O-crésol Nitrate Radicaux hydroxyle Nitrite Réaction photo induite Oxydes d'azote Rayonnement UV Index. décimale : 540 Chimie et sciences connexes Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=4058 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité AMI/4142 AMI/4142 Thèse Bibliothèque principale Thèses Disponible
Titre : Dénitrification par l'utilisation de la souche Enterobacter Hormaechei : Prélevée de la station d'épruration Ibn Ziad Type de document : texte imprimé Auteurs : Mohamed Khelil Aouati, Auteur ; Brahim Kebabi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 129 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles.
Langues : Français (fre) Catégories : Français - Anglais
ChimieTags : Enteroba cter hormaechei dénitrification hétérotrophique nitrate rapport C/N Enterobacter hormaechei Heterotrophic denitrificationl Nitrate C/N ratio C / Nإنتيروباكتر هورمايشي نزع النتروجين المغاير نترات نسبة Index. décimale : 540 Chimie et sciences connexes Résumé : The work that we present in this thesis consists of a study of the nitrate degradation reaction of wastewater by the use of a biological process. Heterotrophic denitrification is one of the most selective and advanced method for nitrate removal, it is usually inhibited by insufficient carbon sources. This process requires the use of a final electron acceptor, often it is a hydrocarbon such as methanol, glucose, fructose .... In our case we tested at 35 ° C in a suitable nutrient medium, sodium succinate and methanol, in a first step by the use of a mixed culture taken from the wastewater treatment plant (WWTP) Ibn Ziad, Constantine , Algeria. In a second step by five bacterial strains that have been isolated but only the N5 and N6 strains that have been identified.
five bacterial strains were isolated but only the strains N5 and N6 were identified. The strains were preliminarily identified using biochemical, Gram staining and by API 20 E system, tests and then a method based on the similarity of the PCR-16S rRNA. 16S rRNA gene sequence analysis indicated that both strains were most closely related to Enterobacter hormaechei with sequence similarities of 99%. Both strains showed an excellent capability to remove nitrate and to transform carbon substances namely methanol and sodium-succinate to carbon dioxide.
This process was accompanied by a slight rise in pH with a simultaneous production of nitrogen gas as the end product at 35°C. Nitrate was removed after 48 h of incubation. Thus, the anaerobic denitrification ability of strains N5 and N6 has been proved. Sodium-succcinate is the most favorable carbon source for denitrification by both strains (N5 and N6).
Furthermore, strains N5 and N6 could effectively remove nitrate at low C/N ratios and under conditions where the temperature is elevated, which would benefit nitrate removal from the wastewater.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/AOU7173.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10584 Dénitrification par l'utilisation de la souche Enterobacter Hormaechei : Prélevée de la station d'épruration Ibn Ziad [texte imprimé] / Mohamed Khelil Aouati, Auteur ; Brahim Kebabi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 129 f. ; 30 cm.
2 copies imprimées disponibles.
Langues : Français (fre)
Catégories : Français - Anglais
ChimieTags : Enteroba cter hormaechei dénitrification hétérotrophique nitrate rapport C/N Enterobacter hormaechei Heterotrophic denitrificationl Nitrate C/N ratio C / Nإنتيروباكتر هورمايشي نزع النتروجين المغاير نترات نسبة Index. décimale : 540 Chimie et sciences connexes Résumé : The work that we present in this thesis consists of a study of the nitrate degradation reaction of wastewater by the use of a biological process. Heterotrophic denitrification is one of the most selective and advanced method for nitrate removal, it is usually inhibited by insufficient carbon sources. This process requires the use of a final electron acceptor, often it is a hydrocarbon such as methanol, glucose, fructose .... In our case we tested at 35 ° C in a suitable nutrient medium, sodium succinate and methanol, in a first step by the use of a mixed culture taken from the wastewater treatment plant (WWTP) Ibn Ziad, Constantine , Algeria. In a second step by five bacterial strains that have been isolated but only the N5 and N6 strains that have been identified.
five bacterial strains were isolated but only the strains N5 and N6 were identified. The strains were preliminarily identified using biochemical, Gram staining and by API 20 E system, tests and then a method based on the similarity of the PCR-16S rRNA. 16S rRNA gene sequence analysis indicated that both strains were most closely related to Enterobacter hormaechei with sequence similarities of 99%. Both strains showed an excellent capability to remove nitrate and to transform carbon substances namely methanol and sodium-succinate to carbon dioxide.
This process was accompanied by a slight rise in pH with a simultaneous production of nitrogen gas as the end product at 35°C. Nitrate was removed after 48 h of incubation. Thus, the anaerobic denitrification ability of strains N5 and N6 has been proved. Sodium-succcinate is the most favorable carbon source for denitrification by both strains (N5 and N6).
Furthermore, strains N5 and N6 could effectively remove nitrate at low C/N ratios and under conditions where the temperature is elevated, which would benefit nitrate removal from the wastewater.
Diplôme : Doctorat en sciences En ligne : ../theses/chimie/AOU7173.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10584 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité AOU/7173 AOU/7173 Thèse Bibliothèque principale Thèses Disponible
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