https://dspace.univ-ouargla.dz/jspui/handle/123456789/3998 2026-05-01T10:37:53Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/6751 Titre: EFFET DU STRESS SALIN SUR DEUX PARAMÈTRES HYDRIQUES (TURGESCENCE ET TRANSPIRATION) DE JEUNES PLANTS D’ATRIPLEX HALIMUS ET ATRIPLEX CANESCENS. Auteur(s): BISSATI S; DJERROUDI O; MEHANI M; BELKHODJA M Résumé: Two water parameters were studied in this work, in conjunction with tolerance to salt stress, ie the turgor and transpiration in young plants of Atriplex halimus and Atriplex canescens. We determined the relative water content (RWC or TRE) or turgor and water loss through transpiration (RWL). For this, we tested the action of salts combined NaCl + CaCl 2 at 400 and 600 meq. The results after a week of stress, show that: the salinity has a highly significant effect on both species, characterized by a reduction in turgor and transpiration. However, this reduction is more pronounced as A.halimus than A. canescens. Moreover, whatever the parameter studied (turgor, transpiration, leaf area, stomatal density) values are increased in the presence of the nutrient solution alone. If the salt concentration exceeds 400 meq salts combined, either for A. halimus or A. canescens, these parameters decrease and the salt becomes harmful. The results also showed the existence of a close relationship between these parameters. Thus, when the relative water content (RWC) decreases, there is a gradual decrease in water loss (RWL) transpiration, characterized by closure of stomata. Description: Revue des bioressources 2011-06-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/6745 Titre: PRODUCTION DES METALLOPROTEINASES MATRICIELLES DANS LES VESICULES SEMINALES, LA PROSTATE ET LE CANAL DEFERENT DU MERION DE LIBYE (MERIONES LIBYCUS) AU COURS DE LA PERIODE ACTIVE DU CYCLE REPRODUCTEUR Auteur(s): Mansouria BELHOCINE; Thérèse GERNIGON; Yasmina BENAZZOUG; Jean-Marie EXBRAYAT Résumé: An immunohistochemical study of matrix metalloproteinases (MMP-3, MMP-7) was undertaken on the seminal vesicle, prostate and vas deferens of Meriones libycus in order to verify their implication in the cellular process of reproduction. Meriones libycus were collected from Beni-Abbes areas in the spring (breeding period). The work was done using the indirect immunohistochemistry protocol by amplification with streptavidin-biotin-peroxidase and AEC as chromogen. In the seminal vesicles, the MMP-3 and MMP-7 were immunolocalized in epithelial cells and smooth muscle cells (SMC) without any immunostaining in the extracellular matrix (ECM) and the secretion. In the ventral prostate, MMP-3 and MMP-7 immunoexpressions were concentrated in the apical pole of the epithelial cells with a less immunoresponse in SMC and a lack of immunoreactivity in the ECM. The not immunostained secretion was followed by empty circular areas of variable size and was surrounded by a small amount of an immunolabelled material. This phenomenon reflected a detachment of secretion allowing its movement in the tubules. In the dorsal prostate, there were as well the epithelial cells whose produced MMP-3 and MMP-7 with an absence of MMP-3 and a slight MMP-7 immunoreaction in SMC; the secretion showed a strong immunolabelling. In the vas deferens, epithelial cells, SMC and secretion were strongly immunostained. MMPs are involved in the flow of secretion in the ventral prostate and are probably implicated in elaboration of secretion and subsequently in sperm maturation. Description: Revue des bioressources 2011-06-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/6748 Titre: FACULTES DIGESTIVES DU DROMADAIRE FACE AUX CONTRAINTES ALIMENTAIRE DU MILIEU SAHARIEN Auteur(s): CHEHMA A; FAYE B Résumé: The Sahara is characterized by extremely harsh and very restrictive conditions of soil and climate not allowing the development as a cover adapted flora (lignified plants, halophytes, tough ...). In this environment with scarce resources, the dromedary express remarkable capacity to adapt himself to make the best use of available resources Saharan ecosystems. In fact it happens to survive, reproduce and even to produce (meat, milk etc ....) In an extensivefarming method based entirely on the exploitation of these natural Saharan pasture. This work is a synthesis of different characteristics digestive, behavioral and food of this species all of which gives meaning to the concept of adaptability of camels to desert ecosystems. These faculties of adaptation can be declined into two types of strategy: (i) a physiological strategy (storage, economic losses, recycling), (ii) a behavioral strategy (ambulatory pasture spacing periods of watering, plant selection,plant diversity of the diet). These strategies, together with the anatomical peculiarities of the animal (flexible foot involving a small trampling, long neck allowing access to the upper layers of vegetation) make an animal with low environmental impact. Description: Revue des bioressources 2011-06-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/6746 Titre: LES INSECTES DANS LE MENU TROPHIQUE DES JEUNES MOINEAUX DANS LA PALMERAIE DE KHOZANA (OUARGLA SAHARA ALGERIEN). Auteur(s): GUEZOUL O; BENAI A; SEKOUR M; SOUTTOU K; DOUMANDJI S Résumé: The study of the trophic menu of the young people To pass domesticus X P. hispaniolensis is carried out for the first time in a palm plantation with 80 of Ouargla (34° 54 ' NR., 5° 20 ' E.). The analysis of the stomachic contents made it possible to identify 347 preys consisted a large fraction of insects in the young sparrows belonging to four categories of ages (100% for let us oisillons sparrow old from 1 to 3 days, 93.9% for the old individuals from 4 to 6 days, 99.0% for let us oisillons from 7 to 9 days and 97.7% for those from 10 to 12 days). The species about Lepidoptera are most intensely consumed by the four categories of age is the young people from 1 to 3 days (59.6%), from 4 to 6 days (78.8%), from 7 to 9 days (83.3%) and from 10 to 12 days (63.6%). Let us young from 1 to 3 days devour apart from Lepidoptera, of Heteroptera with a rate of 34.6%. In the same way the young people of the second category ingurgitent in addition to Lepidoptera, Heteroptera (7.6%) and Oligocheta (6.1%). The old chicks between 7 and 9 days introduce in addition to Lepidoptera, Heteroptera and Coleoptera each one with a rate of 6.3%. The last category of the young people consume in addition to the Lepidoptera, of the Coleoptera (18.2%). Description: Revue des bioressources 2011-06-01T00:00:00Z