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Papers by moulay belkhodja

Acta Botanica Gallica, 1993

Summary The effect of increasing salt concentrations (Nacl+Cacl2) going from 50 to 100, 150 and 2... more Summary The effect of increasing salt concentrations (Nacl+Cacl2) going from 50 to 100, 150 and 200 meq.l−1 on the metabolic comportment of the stems and young roots of a local variety of Faba bean and of two determinate and indeterminable growth lines is studied after 20 days of germination of the seeds in order to evaluate the tolerance of the salt stress. The different treatments show that the lines and the local variety tested produce proline at this development stage of the plant. This nitrogen compound is admitted as an index to the plant tolerance to the agressions such as coldness, dryness or salinity. The local variety accumulates proline in the roots with and without 50 and 100 meq of salts l−1 (Nacl-Cacl2 V/V). The determinate growth lines accumulates proline in the stems as the salts concentrations increases. However, the amino acid increases in the roots until 100 med.l−1 of Nacl+Cacl2. It reduces in higher concentrations. In the stems and the roots of the indeterminate growth lines, salinity...

Journal of Fundamental and Applied Sciences, Mar 14, 2018

Various morpho-physiological characters related to the water deficit (relative water content, rat... more Various morpho-physiological characters related to the water deficit (relative water content, rate water loss, stomatal density, stomatal resistance), were studied at five durum wheat genotypes under two hydrous conditions. The relationship between traits and adaptative strategies develops by each genotype have been described. Results obtained show that been present an appreciable variability intraspecific for the morpho-physiological parameters related to the adaptation to the water deficit. Tolerance of this condition has estimated through for relative water content who is explained by morpho-physiological parameters. Finally, the contribution of the morpho-physiological parameters in the adaptation of the durum wheat depends closely on the intensity of the hydrous deficit.

International Journal of Agriculture and Biosciences, 2020

International Journal of Innovation and Applied Studies, Sep 2, 2017

Micropropagation in vitro et régénération de niébé (Vigna unguiculata (L.) Walp) à partir des noe... more Micropropagation in vitro et régénération de niébé (Vigna unguiculata (L.) Walp) à partir des noeuds cotylédonaires [ In vitro micropropagation and plants regeneration of Cowpea (Vigna unguiculata (L.) Walp) from cotyledonary node ]

International Journal of Innovation and Applied Studies, Aug 30, 2016

Water stress is the major environmental stresses that affect agricultural production worldwide, e... more Water stress is the major environmental stresses that affect agricultural production worldwide, especially in arid and semi-arid regions. This research investigated the effect of water deficit on five wheat cultivars grown in the greenhouse until anthesis. Mild (60%) and severe (30%) water deficit regimes were used with a control of 100% soil field capacity. The effect of water stress on parameters was investigated including; Relative water content (RWC), pigment content (chl a, chl b, carotenoids, chl tot), proline, soluble sugars, rate of K + and Na + were determined. The results indicated that the effect of water deficit on biochemical parameters depended on the combination of water stress regime and wheat cultivars. The analyses carried show that under water deficit stress RWC was sharply reduced due a combination of leaf growth reduction and abscission. Water deficits impose leaf chlorophyll content decrease. In addition, wheat genotypes a more significant accumulation of solubles sugars than of proline. It results from them also a rate high from Na + and a low rate of K + at the time of the stress. Finally, the contribution of the physio-biochimicals parameters in the adaptation of the durum wheat depends closely on the genotypes and intensity of the hydrous deficit.

International Journal of Innovation and Applied Studies, Sep 2, 2015

The processes involved in the development of a performance culture are influenced not only by gen... more The processes involved in the development of a performance culture are influenced not only by genetic factors but also by the intervention of environmental factors. Soil salinity is a permanent threat to the survival of plants. The choice of a salt tolerant species would be a solution to this constraint. This study aims to assess the impact of salt stress during the vegetative stage of okra (Abelmoschus esculentus L.).Plants were stressed with different concentrations of NaCl from 0, 50, 100, 150 to 200 mM NaCl for one week. The results obtained show that the application of stress results in a moderate decrease in the relative water content. Chlorophyll a, b, and total caroténoïdes are declining during times of stress. An increase in proline content and soluble sugars was recorded in leaves and roots. The accumulation of proline and soluble sugars could be an indicator of salinity tolerance which explains the maintenance of good water status among the studied plants. The biosynthesis of chlorophyll pigments would be linked to the proline biosynthesis activity.

Journal of Molecular Liquids, Sep 1, 2021

Abstract Series of novel 1,2,3-triazole based quaternary ammonium surfactants with different hydr... more Abstract Series of novel 1,2,3-triazole based quaternary ammonium surfactants with different hydrophobic chain length and head group substituents were synthetized and characterized. Their surface properties and aggregation behavior were discussed on the basis of tensiometry and conductimetry measurements by using several parameters, including critical micelle concentration (CMC), surface tension at the cmc (γcmc), adsorption efficiency (pC20), effectiveness of surface tension reduction (Πcmc), minimum surface area occupied by a molecule (Amin) at the air − water interface and standard Gibbs free energy of micellization Δ G Mic 0 . These heterocyclic surfactants exhibit much lower CMC values as compared with those reported for conventional alkyltriethyl ammoniums and alkylbenzyldiethyl ammonium salts. Their micelles formation and surface adsorption in aqueous media can be tuned out through a suitable choice of the substituent attached to the polar head. Triethyl ammonium (CnTzTEA] and diethylbenzyl ammonium surfactants (CnTzBz) showed improved micellization behavior than tetradecyl diethyl ammonium (CnTzC14) homologous. The in vitro antimicrobial activity of the surfactants against B. subtilis, P. aerugenosa and A.niger strains was also investigated. CnTzBz series possessing benzyl chain showed better activity against all the tested microorganisms with minimum inhibitory concentration ranging from 6 to 57 μmol/L.

Science et changements planétaires / Sécheresse, Oct 1, 2004

... Author(s) : Moulay Belkhodja, Yasmina Bidai , Laboratoire de physiologie végétale, Faculté de... more ... Author(s) : Moulay Belkhodja, Yasmina Bidai , Laboratoire de physiologie végétale, Faculté des sciences, Université Senia, 31 Oran, Algérie. ... Keywords : à venir. Pictures. ARTICLE. Auteur(s) :, Moulay Belkhodja, Yasmina Bidai. ...

Applied Ecology and Environmental Research, 2023

In vitro multiplication of okra is known to be delicate due to its recalcitrant nature. The curre... more In vitro multiplication of okra is known to be delicate due to its recalcitrant nature. The current study was conducted to investigate the potential applications of thidiazuron (TDZ) on okra's in vitro regeneration. Cotyledonary leaves, hypocotyls and apices were taken from 15-day old in vitro grown seedlings, they were then inoculated on Gamborg (B5) medium containing different plant growth regulators. Maximum callus formation (100%) was obtained from cotyledonary leaves and hypocotyls on B5 without hormones also by adding 0.5 mgL-1 TDZ and 1 mgL-1 BAP for cotyledonary leaves followed by B5 containing 1 mgL-1 TDZ and 1 mgL-1 BAP with 95.83% of calli formed from hypocotyls. B5 supplemented with 1 mgL-1 of TDZ gave the highest rate (100%) of direct regeneration from apices followed by Gamborg medium without PGRs and B5 containing an equimolar concentration of TDZ and BAP with 66.66% of shoot formation. This regeneration system can be used to produce healthy plantlets with a low risk of genetic instability and somaclonal variants.

International Journal for Research in Applied Science and Engineering Technology, Feb 28, 2022

Tomatoes are an important plant in terms of human consumption in many countries of the world. The... more Tomatoes are an important plant in terms of human consumption in many countries of the world. The salinity of soils and irrigation water is one of the limiting factors of plant productivity and agricultural yield. The present work consisted of evaluating the physiological and enzymatic behaviour of the four tomato varieties, Marmande, Aicha, Henz1573 and Cerise, subjected to increasing concentrations. The results obtained showed that the sensitivity of the four varieties was observed in a variable way from one genotype to another. Indeed the levels of chlorophyll a, b and total have been reduced under the effect of saline stress, while the concentration of proline has increased. The content of 1-aminocyclopropane-1-carboxylic acid (ACC) determined in the leaves increased significantly as a function of salinity levels and genotypes. The rate of ethylene production in tomato petioles was a function of salinity levels, leaf age and genotype.

8th African Crop Science Society Conference, El-Minia, Egypt, 27-31 October 2007, 2007

... BELKHODJA MOULAY & BENLALDJ AMEL ... Discussion and conclusion The distribution of ions i... more ... BELKHODJA MOULAY & BENLALDJ AMEL ... Discussion and conclusion The distribution of ions in the organs of plants and their control are main parameters in the salt stress reaction (Alem and Amri,2005) because they allow to distinguish the disparities in tolerance to salinity ...

Science et changements planétaires / Sécheresse, Sep 1, 2007

Ce travail vise a etablir l’etat des surfaces occupees par Pistacia atlantica Desf. subsp. atlant... more Ce travail vise a etablir l’etat des surfaces occupees par Pistacia atlantica Desf. subsp. atlantica dans le Nord-ouest algerien. Peu de travaux ont aborde l’ecologie de cet arbre hors foret et la composition floristique qui l’accompagne. Il est important de souligner que ce type de formation n’est pas pris en compte dans les travaux, ni les inventaires forestiers nationaux, sauf dans de rares exceptions. Notre etude cherche a determiner par un diagnostic phytoecologique, l’etat des surfaces arborees occupees par le pistachier de l’Atlas. L’analyse de 12 releves a ete realisee pour diagnostiquer et quantifier la ressource vegetale. Il ressort des resultats que le pistachier de l’Atlas se trouve souvent sous forme eparse et en densite tres faible. Dans le nord de l’Algerie, il est souvent dominant et associe aux especes thermophiles epineuses mediterraneennes. Au sud, son association se limite au jujubier, a l’alfa, au sparte et a l’armoise. Les principaux facteurs qui contribuent a sa degradation sont l’action zoogene, les problemes ecophysiologiques, les incendies, les defrichements, etc.

Acta Botanica Gallica, Mar 1, 2012

La présente étude montre la variation saisonnière des teneurs en substances qualifiées de stress ... more La présente étude montre la variation saisonnière des teneurs en substances qualifiées de stress des principaux organes végétatifs (feuilles, tiges et rhizome) de l’oyat (Ammophila arenaria (L.) Link) poussant en conditions naturelles sur la côte ouest de l’Algérie. Ces substances sont la proline et les sucres solubles qui sont généralement libérés et stockés dans les cellules des organes végétatifs des

International Journal for Research in Applied Science and Engineering Technology, Mar 31, 2022

The Crops in dry and semi-arid locations are frequently subjected to negative environmental varia... more The Crops in dry and semi-arid locations are frequently subjected to negative environmental variables such as high soil salinity. An experiment was carried out to investigate the response of tomato to salinity, a variety that has received little attention. The impacts on gas exchange parameters, relative water content (Rwc), leaf area, and total chlorophyll and phenol levels were all studied. Salt stress was administered with four treatments were tested: 0 mM NaCl (Control) ,75 mM; 145 mM and 200 mM.. The results showed that the salt stress and salinity treatments had a considerable influence on the examined parameters, with the effects being much more pronounced in all treatments especialy in 200 mM salt treatment. Different modes of adaptation to saline stress were demonstrated by Tomato. The adaptations under this stress are mostly morphological (by decreasing leaf area), physiological (reduction in net CO2 assimilation rate, stomatal conductance and transpiration, and Rwc), and biochemical (decrease of chlorophyll content). As a result, phenol buildup was increased in Tomato leaves as a common defensive strategy. These characteristics enabled tomato to be classified as a salinity-tolerant cultivar.

Journal of Fundamental and Applied Sciences, May 10, 2016

The aim of this study is to compare the water and photosynthetic characteristics of two xerophili... more The aim of this study is to compare the water and photosynthetic characteristics of two xerophilic ecotypes of Atriplex halimus (L.). Seeds collected from two different sites Djelfa and Oran are germinated in controlled greenhouse. After 6 months, the plantlets were treated 21 days with increasing concentrations of abscisic acid (0M, 10-6 M and 10-3 M). The results show that ecotype of Djelfa reduced water loss through transpiration because of high stomatal resistance. Consequently the content of chlorophyll a and b decrease significantly compared to Oran ecotype which show an increase of the osmotic potential and relative water content. Osmotic adjustment to reduce dehydration and maintain a good photosynthesis seems efficient in Oran ecotype.

Acta Botanica Gallica, 1996

Summary The effect of increasing salt concentrations (NaCI+ CaCI2) going from 50 to 100 and 200 m... more Summary The effect of increasing salt concentrations (NaCI+ CaCI2) going from 50 to 100 and 200 meq.l−2 on the metabolic behaviour of the leaves, stems and roots of a local variety L. of Faba bean and two determinate (D) and indeterminate (I) growth lines is followed during the development of plant. The amount of proline differs in the organ according to the development stage, the type of plants and the salt treatments. Without salts, the proline is more abundant in the roots of a local variety (L), the stems of the line (D) at 5 leaves stage; it is only in traces in the next stages. At the line (I), a slow accumulation comes forward during the development of plant in the three organs. In the presence of salts, and only at 200 meq, the proline is more abundant in the line D leaves during the flowering and setting pod. At the line I, the roots are more wealthy in all mediums and stages; while, the nitrogen compound increases in the leaves at the post-flowering and setting pod only at 200 meq of salts. A co...

Advanced studies in biology, 2013

The attitude of the Saharan variety tadalaghte of Phaseolusvulgaris L. Beanin presence of growing... more The attitude of the Saharan variety tadalaghte of Phaseolusvulgaris L. Beanin presence of growing doses of NaCl shows it can be able to stand moderate doses of this salt. The lack in water caused by the osmotic pressure in the root environment does not prevent this variety from being supplied with water, by carrying out an osmo-control and a complete osmotic adjustment to ensure maintain of a suitable level of tissues hydration. In nutritional terms, the presence of Na+ prevents the absorption of K+ and Ca+; but in that specific case, we notice the presence of K+ in leaves in quantities that are higher than those in roots. This massive transfer of K+ from roots that empties its K+ in favour of leaves seems to be a strategy of ionic control and maintain of a correct physiological activity. In general, levels of chlorophyll (a) and (b) decrease with the increase of salinity concentration. Our obtained results show an increase in DNA and RNA rate of our variety under the influence of saline stress. Salinity reduces the speed of cellular development and the protein and RNA synthesis in apricot leaves (Phaseolus vulgaris L.).