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Partager le résultat de cette recherche Interroger des sources externesL’accumulation de la proline sous déficit hydrique, synthèse et devenir après retour de l’arrosage chez les végétaux / Sarra Merabta
Titre : L’accumulation de la proline sous déficit hydrique, synthèse et devenir après retour de l’arrosage chez les végétaux : Exemple des Triticum et Hordeum. Type de document : texte imprimé Auteurs : Sarra Merabta, Auteur ; Mostefa Benlaribi, Directeur de thèse Mention d'édition : 18/12/2019 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 164 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale:Biotechnologies, Biologie et Environnement Biotechnologies, Biologie et Environnement:Les bases Biologiques de la Production et Biodiversité Végétale Blé (Triticum) orge(Hordeum) stress hydrique Proline chlorophylle Stress oxydatif enzymes Wheat (Triticum) Barley (Hordeum) hydrous stress Chlorophyll Oxidative stress القمح ( )Triticumالشعير ( )Hordeumالاجهاد المائي البرولين الكلوروفيل الاجهاد
التأكسد الانزيماتIndex. décimale : 570 Sciences de la vie. Biologie Résumé :
The objective of this work consists in evaluating the effect of a hydrous deficit created using a restriction of irrigation for a period of twenty (20) days on two durum wheat genotypes (Triticum durum Desf.): Gamgoum Rekham ( GGR) and Haurani; two genotypes of common wheat (Triticum aestivum L.): Florence Aurore 8193 (FA) and Mexipak and two genotypes of barley (Hordeum vulgare L.): Manel and Saida 183 and to follow the impact of this controlled stress after 24 hours (APR1) and one week (APR2), following the return of watering. A first experiment is carried out in order to compare the relation between Proline and chlorophyll, the application of prolonged hydric stress causes an accumulation of the content of proline in the leaves of the two kinds tested compared to that of their witnesses. However, this accumulation is in favor of the Triticum kind beside the Hordeum kind with a remarkable
diversity within the different varieties. As for the total chlorophyll composition of the organs studied, it evolves in a sawtooth pattern that does not lead to any indicative trend during the various treatments. After rehydration, there is a progressive decrease in proline content (APR1 and APR2), particularly at the two barley genotypes, and any change concerning the chlorophyll content. One second experimentation is carried out on the same genotypes with the same hydric treatments but this time to determine the influence of the oxydative stress produced by the dryness on the antioxydant metabolism. We were particularly interested in the activity of the superoxyde dismutase (SOD), malonedialdéhydes (MDA) content, catalase (CAT), peroxidases content (POD), as well as the ascorbate peroxidases (APX), and the content of proteins, aiming to characterize varieties according to their defense mechanisms against the effects of free radicals induced by water stress more precisely during the most critical stage and more affected by this Lack (heading stage) and to evaluate the impact of the oxydative
defensive system (Indicators of oxidation and antioxidant enzymes activities) on the synthesis and the degradation of the proline in order to identify the elements of the signaling pathways involved, and to evaluate the effect of this stress on the synthesis of this compound since the precursor molecules and its fate after the return of watering.Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/biologie/MER7611.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11447 L’accumulation de la proline sous déficit hydrique, synthèse et devenir après retour de l’arrosage chez les végétaux : Exemple des Triticum et Hordeum. [texte imprimé] / Sarra Merabta, Auteur ; Mostefa Benlaribi, Directeur de thèse . - 18/12/2019 . - جامعة الإخوة منتوري قسنطينة, 2019 . - 164 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Biologie et Ecologie Végétale:Biotechnologies, Biologie et Environnement Biotechnologies, Biologie et Environnement:Les bases Biologiques de la Production et Biodiversité Végétale Blé (Triticum) orge(Hordeum) stress hydrique Proline chlorophylle Stress oxydatif enzymes Wheat (Triticum) Barley (Hordeum) hydrous stress Chlorophyll Oxidative stress القمح ( )Triticumالشعير ( )Hordeumالاجهاد المائي البرولين الكلوروفيل الاجهاد
التأكسد الانزيماتIndex. décimale : 570 Sciences de la vie. Biologie Résumé :
The objective of this work consists in evaluating the effect of a hydrous deficit created using a restriction of irrigation for a period of twenty (20) days on two durum wheat genotypes (Triticum durum Desf.): Gamgoum Rekham ( GGR) and Haurani; two genotypes of common wheat (Triticum aestivum L.): Florence Aurore 8193 (FA) and Mexipak and two genotypes of barley (Hordeum vulgare L.): Manel and Saida 183 and to follow the impact of this controlled stress after 24 hours (APR1) and one week (APR2), following the return of watering. A first experiment is carried out in order to compare the relation between Proline and chlorophyll, the application of prolonged hydric stress causes an accumulation of the content of proline in the leaves of the two kinds tested compared to that of their witnesses. However, this accumulation is in favor of the Triticum kind beside the Hordeum kind with a remarkable
diversity within the different varieties. As for the total chlorophyll composition of the organs studied, it evolves in a sawtooth pattern that does not lead to any indicative trend during the various treatments. After rehydration, there is a progressive decrease in proline content (APR1 and APR2), particularly at the two barley genotypes, and any change concerning the chlorophyll content. One second experimentation is carried out on the same genotypes with the same hydric treatments but this time to determine the influence of the oxydative stress produced by the dryness on the antioxydant metabolism. We were particularly interested in the activity of the superoxyde dismutase (SOD), malonedialdéhydes (MDA) content, catalase (CAT), peroxidases content (POD), as well as the ascorbate peroxidases (APX), and the content of proteins, aiming to characterize varieties according to their defense mechanisms against the effects of free radicals induced by water stress more precisely during the most critical stage and more affected by this Lack (heading stage) and to evaluate the impact of the oxydative
defensive system (Indicators of oxidation and antioxidant enzymes activities) on the synthesis and the degradation of the proline in order to identify the elements of the signaling pathways involved, and to evaluate the effect of this stress on the synthesis of this compound since the precursor molecules and its fate after the return of watering.Note de contenu :
Annexes.Diplôme : Doctorat En ligne : ../theses/biologie/MER7611.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11447 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité MER/7611 MER/7611 Thèse Bibliothèque principale Thèses Disponible
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 : 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 : 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 : Utilisation des eaux d'une station d'épuration pour l'irrigation des essences forestières urbaines. Type de document : texte imprimé Auteurs : Hamssa Djeddi ép Bouatia, Auteur ; Chaabane Rahmoune, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2007 Importance : 144 f. Note générale : 01 Disponible à la salle de recherche 02 disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : Ecologie végétale Chèorophylle Proline Sucres solubles Essences forestières urbaines Station d'épuration Eaus usées Paramètrs morphologiques Urban forestry trees Station of purification waste Water proline soluble Sugars Chlorophyll morphological Parameters أشجار غابية محطة معالجة المياه مياه قذرة البرولين السكريات القابلة للذوبان الكلوروفيل الخصائص البيوكيميائية Index. décimale : 570 Sciences de la vie. Biologie Résumé : The objective of our work is to improve the possibility of use of the waste water of the station of purification Ibn Ziad, for the irrigation of the urban forestry trees and to put in evidence the impact of waters used on the different components of the environment, notably the physico-chemical characteristics of soil and the plantations adaptability to waste water irrigation. The results of the tests led on three urban forest species (Schinus molle, Acacia cyanophylla, Eucalyptus gomphocephala), showed that the irrigation with treated wastewaters permits a growth of the different plants and can be used without danger for the irrigation of the plantations. We noted that the best result gotten for the growth is noted at the plantations undergoing the irrigation with the treated waste water for the three studied species. On the other hand, the irrigation by ruffians’ wastewaters led at these species a reduction of the parameters measured in relation to the plantations irrigated by a drinking water. We also note that there is a gain of aerial and roots biomass to the level of the plantations submitted to an irrigation with treated waste waters for the three studied species. Our results show that the plantations of the three studied urban forestry trees are able to adapt with the irrigation with waste waters by accumulating organic solutions (proline, soluble sugars and chlorophylls). The species that accumulates more organic solutions is considered as the most resistant species. In our case it is the Schinus molle that is then the most resistant and then comes the Eucalyptus gomphocephala and finally the Acacia cyanophylla that was the most affected by the load of the waste waters. Diplôme : Magistère En ligne : ../theses/biologie/DJE4878.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=1390 Utilisation des eaux d'une station d'épuration pour l'irrigation des essences forestières urbaines. [texte imprimé] / Hamssa Djeddi ép Bouatia, Auteur ; Chaabane Rahmoune, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2007 . - 144 f.
01 Disponible à la salle de recherche 02 disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : Ecologie végétale Chèorophylle Proline Sucres solubles Essences forestières urbaines Station d'épuration Eaus usées Paramètrs morphologiques Urban forestry trees Station of purification waste Water proline soluble Sugars Chlorophyll morphological Parameters أشجار غابية محطة معالجة المياه مياه قذرة البرولين السكريات القابلة للذوبان الكلوروفيل الخصائص البيوكيميائية Index. décimale : 570 Sciences de la vie. Biologie Résumé : The objective of our work is to improve the possibility of use of the waste water of the station of purification Ibn Ziad, for the irrigation of the urban forestry trees and to put in evidence the impact of waters used on the different components of the environment, notably the physico-chemical characteristics of soil and the plantations adaptability to waste water irrigation. The results of the tests led on three urban forest species (Schinus molle, Acacia cyanophylla, Eucalyptus gomphocephala), showed that the irrigation with treated wastewaters permits a growth of the different plants and can be used without danger for the irrigation of the plantations. We noted that the best result gotten for the growth is noted at the plantations undergoing the irrigation with the treated waste water for the three studied species. On the other hand, the irrigation by ruffians’ wastewaters led at these species a reduction of the parameters measured in relation to the plantations irrigated by a drinking water. We also note that there is a gain of aerial and roots biomass to the level of the plantations submitted to an irrigation with treated waste waters for the three studied species. Our results show that the plantations of the three studied urban forestry trees are able to adapt with the irrigation with waste waters by accumulating organic solutions (proline, soluble sugars and chlorophylls). The species that accumulates more organic solutions is considered as the most resistant species. In our case it is the Schinus molle that is then the most resistant and then comes the Eucalyptus gomphocephala and finally the Acacia cyanophylla that was the most affected by the load of the waste waters. Diplôme : Magistère En ligne : ../theses/biologie/DJE4878.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=1390 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DJE/4878 DJE/4878 Thèse Bibliothèque principale Thèses Disponible
Titre : Comportement du chene liège (Quercus suber L.) aux températures extremes. Type de document : texte imprimé Auteurs : maria Ferhati, Auteur ; D. Alatou, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2007 Importance : 98 f. Format : 30 cm. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Catégories : Français - Anglais
BiologieTags : écologie végétale Chêne liège Région d'El Kala Variation thermique Cork Oak termal variation adaptation proline slubles sugares البلوط الفلیني التأقلم الحراري التغیرات الحراریة منطقة القالة Index. décimale : 570 Sciences de la vie. Biologie Résumé : The climatic changes and the rise in temperature by effect of the green house. The aalysis of the thermal variation of the area of El Kala are located in the forks 35 – 45°C with variable duration and frequencies, but much more it concentrated in the range 36 – 40°C, furthermore, it hasn’t any effect on the biology core in wich the temperament is thermophyl. The results obtained on the biochimical level show that the sowings are adopted very well with these high temperatures.except some sowings with growth beig faded. The varions studied organs show that the “ proline” and the soluble sugars concentrated preferentially on the level of leaves, root and stems. This work is of a partical interest for the forestier in order to evaluate the risk in a medium-term of heat bodies on the afforestration of the Cork Oak . Note de contenu : Annexe biochimiques.
Annexes climat.Diplôme : Magistère En ligne : ../theses/biologie/FER4933.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=1753 Comportement du chene liège (Quercus suber L.) aux températures extremes. [texte imprimé] / maria Ferhati, Auteur ; D. Alatou, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2007 . - 98 f. ; 30 cm.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Catégories : Français - Anglais
BiologieTags : écologie végétale Chêne liège Région d'El Kala Variation thermique Cork Oak termal variation adaptation proline slubles sugares البلوط الفلیني التأقلم الحراري التغیرات الحراریة منطقة القالة Index. décimale : 570 Sciences de la vie. Biologie Résumé : The climatic changes and the rise in temperature by effect of the green house. The aalysis of the thermal variation of the area of El Kala are located in the forks 35 – 45°C with variable duration and frequencies, but much more it concentrated in the range 36 – 40°C, furthermore, it hasn’t any effect on the biology core in wich the temperament is thermophyl. The results obtained on the biochimical level show that the sowings are adopted very well with these high temperatures.except some sowings with growth beig faded. The varions studied organs show that the “ proline” and the soluble sugars concentrated preferentially on the level of leaves, root and stems. This work is of a partical interest for the forestier in order to evaluate the risk in a medium-term of heat bodies on the afforestration of the Cork Oak . Note de contenu : Annexe biochimiques.
Annexes climat.Diplôme : Magistère En ligne : ../theses/biologie/FER4933.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=1753 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité FER/4933 FER/4933 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 PermalinkPermalink
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