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Research paper thumbnail of Comparative Responses of Algerian Tetraploid Wheat Cultivars to Salinity at the Seedling Stage

International Journal of Innovative Approaches in Agricultural Research, 2020

Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid an... more Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid and semi-arid regions. This study was carried out to examine the effect of salt stress induced by sodium chloride (NaCl) at different concentration levels (0, 50, 100 and 150 mM) on seed germination rate, root length, roots number, coleoptile length, root and shoot fresh weights of eleven durum wheat varieties. The results revealed significant differences among the genotypes for all the measured parameters. The increase in NaCl concentrations showed concomitant decrease in all morphological attributes, but varied depending on cultivars and levels of salinity. Seed germination rate and root length demonstrated a linear response to NaCl treatment, while significant linear and quadratic regression on salinity for roots number, coleoptile length, root and shoot fresh weights were observed. The cluster analysis based on Ward’s method sequestrated the studied genotypes into three clusters. Seed germination rate and root length showed the lowest difference among the groups; and the remaining traits: roots number, coleoptile length, root and shoot fresh weights were the most indicative of salt-tolerance. Waha, Megress and GTA dur were the most tolerant genotypes that could be used as donors of choice in wheat breeding programs targeting the improvement of salinity tolerance during the seedling stage.

Research paper thumbnail of Comparative Responses of Algerian Tetraploid Wheat Cultivars to Salinity at the Seedling Stage

International Journal of Innovative Approaches in Agricultural Research, 2020

Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid an... more Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid and semi-arid regions. This study was carried out to examine the effect of salt stress induced by sodium chloride (NaCl) at different concentration levels (0, 50, 100 and 150 mM) on seed germination rate, root length, roots number, coleoptile length, root and shoot fresh weights of eleven durum wheat varieties. The results revealed significant differences among the genotypes for all the measured parameters. The increase in NaCl concentrations showed concomitant decrease in all morphological attributes, but varied depending on cultivars and levels of salinity. Seed germination rate and root length demonstrated a linear response to NaCl treatment, while significant linear and quadratic regression on salinity for roots number, coleoptile length, root and shoot fresh weights were observed. The cluster analysis based on Ward's method sequestrated the studied genotypes into three clusters. Seed germination rate and root length showed the lowest difference among the groups; and the remaining traits: roots number, coleoptile length, root and shoot fresh weights were the most indicative of salt-tolerance. Waha, Megress and GTA dur were the most tolerant genotypes that could be used as donors of choice in wheat breeding programs targeting the improvement of salinity tolerance during the seedling stage.

Research paper thumbnail of Effet du chlorure de sodium (NaCl) sur la germination et la croissance du maïs (<i>Zea mays L., Poaceae</i>) au Gabon

International Journal of Biological and Chemical Sciences, 2011

Plusieurs plantes côtières du Gabon présentent une pathologie atypique caractérisée par la pourri... more Plusieurs plantes côtières du Gabon présentent une pathologie atypique caractérisée par la pourriture et les anomalies de germination des graines cultivées. Ces troubles, conduisent à la mort prématurée des organes, ou à la réduction de leurs rendements. Afin de déterminer si cette affection était liée à l'effet du NaCl marin, des tests de toxicité saline ont été réalisés sur des graines de maïs blanc (Zea mays L., Poaceae). Les paramètres morphométriques étudiés étaient : la germination des graines, la croissance longitudinale et radiale des tiges, et la production de matière sèche. Les résultats ont révélé que des concentrations salines de 1 g/l induisaient des augmentations significatives des taux de germination (18%), des croissances longitudinales (20%) et diamétrales (18%) ainsi que ceux de la biomasse végétale (22%). Ces hausses sont certainement liées à une fertilisation du milieu par les ions constitutifs (Na + et Cl-) de ce sel. Les concentrations égales ou supérieures à 2 g/l de NaCl ont en revanche provoqué des réductions significatives de tous les paramètres morphologiques étudiés, avec des seuils critiques à 5 g/l. Ce qui laisse suggérer que les troubles analogues rencontrés sur les plantes côtières sont causés par ce sel.

Research paper thumbnail of Comparative Responses of Algerian Tetraploid Wheat Cultivars to Salinity at the Seedling Stage

International Journal of Innovative Approaches in Agricultural Research, 2020

Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid an... more Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid and semi-arid regions. This study was carried out to examine the effect of salt stress induced by sodium chloride (NaCl) at different concentration levels (0, 50, 100 and 150 mM) on seed germination rate, root length, roots number, coleoptile length, root and shoot fresh weights of eleven durum wheat varieties. The results revealed significant differences among the genotypes for all the measured parameters. The increase in NaCl concentrations showed concomitant decrease in all morphological attributes, but varied depending on cultivars and levels of salinity. Seed germination rate and root length demonstrated a linear response to NaCl treatment, while significant linear and quadratic regression on salinity for roots number, coleoptile length, root and shoot fresh weights were observed. The cluster analysis based on Ward’s method sequestrated the studied genotypes into three clusters. Seed germination rate and root length showed the lowest difference among the groups; and the remaining traits: roots number, coleoptile length, root and shoot fresh weights were the most indicative of salt-tolerance. Waha, Megress and GTA dur were the most tolerant genotypes that could be used as donors of choice in wheat breeding programs targeting the improvement of salinity tolerance during the seedling stage.

Research paper thumbnail of Comparative Responses of Algerian Tetraploid Wheat Cultivars to Salinity at the Seedling Stage

International Journal of Innovative Approaches in Agricultural Research, 2020

Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid an... more Salinity is one of the most abiotic stresses restricting wheat growth and productivity in arid and semi-arid regions. This study was carried out to examine the effect of salt stress induced by sodium chloride (NaCl) at different concentration levels (0, 50, 100 and 150 mM) on seed germination rate, root length, roots number, coleoptile length, root and shoot fresh weights of eleven durum wheat varieties. The results revealed significant differences among the genotypes for all the measured parameters. The increase in NaCl concentrations showed concomitant decrease in all morphological attributes, but varied depending on cultivars and levels of salinity. Seed germination rate and root length demonstrated a linear response to NaCl treatment, while significant linear and quadratic regression on salinity for roots number, coleoptile length, root and shoot fresh weights were observed. The cluster analysis based on Ward's method sequestrated the studied genotypes into three clusters. Seed germination rate and root length showed the lowest difference among the groups; and the remaining traits: roots number, coleoptile length, root and shoot fresh weights were the most indicative of salt-tolerance. Waha, Megress and GTA dur were the most tolerant genotypes that could be used as donors of choice in wheat breeding programs targeting the improvement of salinity tolerance during the seedling stage.

Research paper thumbnail of Effet du chlorure de sodium (NaCl) sur la germination et la croissance du maïs (<i>Zea mays L., Poaceae</i>) au Gabon

International Journal of Biological and Chemical Sciences, 2011

Plusieurs plantes côtières du Gabon présentent une pathologie atypique caractérisée par la pourri... more Plusieurs plantes côtières du Gabon présentent une pathologie atypique caractérisée par la pourriture et les anomalies de germination des graines cultivées. Ces troubles, conduisent à la mort prématurée des organes, ou à la réduction de leurs rendements. Afin de déterminer si cette affection était liée à l'effet du NaCl marin, des tests de toxicité saline ont été réalisés sur des graines de maïs blanc (Zea mays L., Poaceae). Les paramètres morphométriques étudiés étaient : la germination des graines, la croissance longitudinale et radiale des tiges, et la production de matière sèche. Les résultats ont révélé que des concentrations salines de 1 g/l induisaient des augmentations significatives des taux de germination (18%), des croissances longitudinales (20%) et diamétrales (18%) ainsi que ceux de la biomasse végétale (22%). Ces hausses sont certainement liées à une fertilisation du milieu par les ions constitutifs (Na + et Cl-) de ce sel. Les concentrations égales ou supérieures à 2 g/l de NaCl ont en revanche provoqué des réductions significatives de tous les paramètres morphologiques étudiés, avec des seuils critiques à 5 g/l. Ce qui laisse suggérer que les troubles analogues rencontrés sur les plantes côtières sont causés par ce sel.