
Zainab El Alaoui-Talibi- Professor at Cadi Ayyad University
Zainab El Alaoui-Talibi
- Professor at Cadi Ayyad University
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56
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Publications (56)
The antifungal activity screening of ten essential oils (EOs) against Rhizopus sp. and Aspergillus sp. was carried out. Among all EOs, Thymus satureioides, Cinnamomum zeylanicum, and Eugenia caryophyllus EOs exhibited the strongest antifungal activity. The double and triple combinations of these EOs showed synergism, especially when the three EOs a...
Lately, Chitosan-based films (C-films) incorporating essential oils (EOs) have gained researchers' attention due to their biodegradability and excellent bioactivities. Nevertheless, the EOs' high cost is considered a constraint. Therefore, we aimed to develop C-films enriched with different concentrations of Cinnamomum zeylanicum EO (0.5% to 8%) an...
Verticillium wilt of olive (VWO), caused by Verticillium dahliae (Vd), represents a significant threat to olive cultivation, particularly to the Moroccan cultivar "Picholine Marocaine", by reducing yield, tree survival, and overall productivity. Current chemical and cultural control strategies provide limited efficacy, highlighting the need for alt...
The interaction between arbuscular mycorrhizal fungus (Rhizophagus irregularis) and Verticillium dahliae was investigated in the susceptible olive cultivar "Picholine Marocaine" under controlled conditions. Olive plants were pre-inoculated with R. irregularis for three months, and subsequently postinoculated with V. dahliae for nine months. The pre...
The short postharvest life of strawberries is a major problem for both manufacturers and consumers. In the present work, chitosan (CS) and chitosan enriched with S. aromaticum, C. zeylanicum, and T. satureioides essential oils mixture (CS-EOs) were utilized as a coating for strawberries to extend their postharvest life. According to the obtained re...
Recently, the concept of biodegradable and bioactive packaging and surface coating has become a trend. In this work, the bioactive films of chitosan were elaborated following the casting method. Contrary to the films containing the Cinnamomum zeylanicum Blume, Thymus satureioides Cosson, and Syzygium aromaticum essential oils (EOs) mixtures, the co...
Nowadays, the exploitation of biopolymers in the industrial sector has become a trend. Chitosan is considered one of the most investigated biopolymers due to its abundance and antibacterial, antifungal, and antibiofilm activities. In this work, chitosan was chemically extracted from shrimp shells. Solutions of HCl 1 M, NaOH 4 M, and NaOH 15 M were...
Marine algae are the most abundant resource in the marine environment and are still a promising source of bioactive compounds including hydrocolloids. This study contributes to the evaluation of the biological and biotechnological potentials of two water soluble polysaccharides, namely alginates (AHS) and fucoidan (FHS), extracted and purified from...
Nowadays, using biodegradable and active packaging as an alternative to oil-based plastics become a trend. Thus, we aimed in this study to develop and generally evaluate chitosan-based films (CH-film) incorporating C. zeylanicum and E. caryophyllus essential oils (EOs) for eventual utilization as food active-packaging. Experimental data revealed th...
With the rising requirement for natural and biodegradable packaging materials, we focused in this study on the elaboration of a bioactive food packaging with desirable properties using high molecular weight chitosan (CHT) combined with ketones and ether-rich essential oils (EOs) such as menthone, α-thujone, and 1,8-cineole. The analysis of the phys...
Alginates extracted from two Moroccan brown seaweeds and their derivatives were investigated for their ability to induce phenolic metabolism in the roots and leaves of tomato seedlings. Sodium alginates (ALSM and ALCM) were extracted from the brown seaweeds Sargassum muticum and Cystoseira myriophylloides, respectively. Low-molecular-weight alginat...
Recently, the scientific community is interested in the synthesis of biodegradable and bioactive packaging to replace oil-based ones. Therefore, the present study aims to elaborate an active and biodegradable material using chitosan (CS-film) combined with pelargonium, tea tree, marjoram, and thyme essential oils (EOs), and then evaluate their diff...
The biofilm development following microbial attachment on food-grade surfaces represents a main problem in the food sector, leading to significant economic losses. To overcome that, the present investigation aimed to develop biodegradable films that protect against heterogeneous biofilms using chitosan and essential oils (EOs). First, the cross-str...
In the food sector, the formation of biofilms as a result of microbial adherence on food-grade surfaces causes a major problem resulting in significant economic losses. Thereby, this work aimed to elaborate a biodegradable film using chitosan (CS-film) and reinforce its antiadhesion activity by incorporating pelargonium, clove, thyme, and cinnamon...
This study aims to assess for the first time the ability of marine polysaccharides and their derivatives to stimulate natural defenses in olive tree leaves. Alginates, ALSM, and ALCM were isolated from the brown algae Sargassum muticum and Cystoseira myriophylloides, respectively. The OASM and OACM fractions were obtained after radical depolymeriza...
The brown Tunisian seaweed Halopteris scoparia was used as a feedstock for producing renewable bioethanol, biogas, and biodiesel to demonstrate the proof of concept for the North African energy sector. A quantitative and qualitative quantification of H. scoparia composition using different colorimetric methods was completed to highlight its bioconv...
Given the increasing interest that is being paid to polysaccharides derived from algae as plant natural defense stimulators, the degree of sulfation of exopolysaccharides produced by P. sordidum for inducing defense responses in date palm vitroplants was investigated. Firstly, the culture parameters of P. sordidum were optimized to maximize the amo...
Sulfated glycoproteins extracted for the first time from the Moroccan green seaweed Codium decorticatum were investigated for their ability to induce a natural defense metabolism in the roots and the upper leaves of tomato seedlings. The crude (AGB) and the purified fractions (AGP) were characterized chemically (Colorimetric assays) and structurall...
In many African countries, the Bayoud is a common disease spread involving the fungus Fusarium oxusporum f. sp. albedinis (Foa). The induction of plant natural defenses through the use of seaweed polysaccharides to help plants against pathogens is currently a biological and ecological approach that is gaining more and more importance. In the presen...
Alhagi maurorum Medik. (Fabaceae) est un arbuste épineux spontané, d'aspect très ramifié qui s'étend de la Russie à la Méditerranée. Il est utilisé par les populations rurales et sahariennes algériennes pour ses propriétés médicinales. Une étude ethnobotanique a été menée dans la région d'Illizi (Sud Est de l'Algérie) entre juin et septembre 2018 a...
The anti-inflammatory and antihyperglycemic effects of polysaccharides extracted from Alhagi maurorum Medik. seeds, spontaneous shrub collected in Southern of Algerian Sahara were investigated. Their water extraction followed by alcoholic precipitation was conducted to obtain two water-soluble polysaccharides extracts (WSPAM1 and WSPAM2). They were...
Alhagi maurorum Medik. (Fabaceae) is a spontaneous shrub native to the region extending from Russia to the Mediterranean and used by rural and Saharan Algerian people for its medicinal effects. This study aims to document the medicinal uses of A. maurorum in Illizi (southern Algeria). Ethnobotanical survey was carried out in Illizi between June and...
The present work aimed to investigate the effect of an autochthonous mycorrhizal consortium in enhancing olive tree tolerance against Verticillium dahliae. The bio-protective effect of this consortium “Rhizolive” on olive “Picholine Marocaine cultivar” infected with V. dahliae was assessed through monitoring disease symptoms development and through...
Polysaccharides are highly variable and complex biomolecules whose inventory of structures is still very incomplete, as nature still preserves unexplored biotopes. Plants, macroalgae and microalgae are an integral part of the daily life of human being regardless of culture, time, or knowledge development of a country. Natural medicine is an ancestr...
The present work investigated the effects of an autochthonous mycorrhizal consortium “Rhizolive consortium” (RC) on the early oxidative events induced in olive plants after
Verticillium dahliae inoculation. Our objective aims to determine whether mycorrhization caused biochemical changes in the stems and roots of olive plants after V. dahliae inocu...
Fucoidans from Moroccan brown seaweed Bifurcaria bifurcata and Fucus spiralis were tested for their elicitor activity after their purification and complete characterization. The fucoidans of B. bifurcata (BBF) and of F. spiralis (FSF) were extracted and purified then characterized by infrared spectroscopy, proton nuclear magnetic resonance spectros...
The present work aimed to assess the efficacy of an arbuscular mycorrhizal fungi consortium “Rhizolive consortium” in alleviating Verticillium wilt symptoms in olive tree. Olive plants cultivar “Picholine Marocaine” were inoculated for three months with Rhizolive consortium and then infected with Verticillium dahliae pathogen. Our results showed th...
Polysaccharides extracted from marine algae have attracted much attention due to their biotechnological applications, including therapeutics, cosmetics, and mainly in agriculture and horticulture as biostimulants, biofertilizers, and stimulators of the natural defenses of plants. This study aimed to evaluate the ability of alginate isolated from Bi...
The present study aimed to evaluate the effect of the interaction of autochthonous mycorrhizal fungi "Rhizolive consortium" and the soil-borne Verticillium dahliae on root colonization, plant growth and nutrients accumulation in olive plants. The assays were conducted on a susceptible olive cultivar "Picholine Marocaine" inoculated for three months...
The degradation of alginate extracted from Moroccan Bifurcaria bifurcata has not been fully established to date. In this work, we report the extraction and the characterization of alginate (ASBB) from the brown algae B. bifurcata, as well as the production of oligo-alginates (OGABs) by using a green chemistry process. The depolymerization of ASBB w...
Autochthonous mycorrhizal consortia showed an important effect on plant growth, nutrient cycling and enhanced plant tolerance. To evaluate the effect of selected autochthonous mycorrhizal consortia namely "Rhizolive consortium" Vs a commercial pure strain "Glomus irregulare" on plant growth, nutrients uptake and tolerance to Verticillium wilt disea...
Autochthonous mycorrhizal consortia showed an important effect on plant growth, nutrient cycling and enhanced plant tolerance. To evaluate the effect of selected autochthonous mycorrhizal consortia namely "Rhizolive consortium" Vs a commercial pure strain "Glomus irregulare" on plant growth, nutrients uptake and tolerance to Verticillium wilt disea...
Alhagi maurorum Boiss (Fabaceae) is a spiny up spontaneous shrub called commonly chouk jmal and Aqool (Suthar et al., 2016). Its different parts are used for many medicinal purposes as ureter relaxer, analgesic, diuretic, antipyretic and expectorant agent (Marashdah et Farraj, 2010). Three different concentrations of Alhagi maurorum Boiss polysacch...
The aim of the present work is to study the effect of arbuscular mycorrhizal fungi (AMF) "autochthonous inoculum" on olive tree growth and development (Picholine Marocaine cultivar). Inoculated olive plants with mycorrhizal autochthonous inoculum namely Rhizolive consortium or with commercial pure strain Glomus irregulare were grown for nine months...
The exploitation of phosphate mines generates an important quantity of phosphate sludge that remains accumulated and not valorized. In this context, composting with organic matter and rhizospheric microorganisms offers an interesting alternative and that is more sustainable for agriculture. This work aims to investigate the synergetic effect of arb...
Our study aimed to search for seaweed polysaccharides able to stimulate date palm defense mechanisms. Extraction, purification, characterization, and elicitor activity of sodium alginate (FSSA and BBSA) from Moroccan brown seaweeds Fucus spiralis and Bifurcaria bifurcata were investigated. FSSA and BBSA were characterized by proton nuclear magnetic...
The aim of the present work is to study the effect of arbuscular mycorrhizal fungi "autochthonous inoculum" on olive tree growth and development (Picholine Marocaine cultivar). Inoculated olive plants with mycorrhizal autochthonous inoculum namely "Rhizolive consortium" or with commercial pure strain Glomus irregulare were grown for nine months und...
The present work aims to investigate the effect of arbuscular mycorrhizal fungi (AMF) in improving the olive tree resistance to Verticillium wilt caused by Verticillium dahliae. Inoculated plants with a mycorrhizal autochthonous consortium "Rhizolive consortium" and pure strain "Glomus irregulare" were infected after three months with V. dahliae. T...
This study reports the effect of Arbuscular Mycorrhizal Fungi (AMF) on olive plants to enhance its tolerance against Verticillium dahliae under greenhouse conditions. Inoculated plants with native mycorrhizal consortium (Rhizolive) or with Glomus irregulare pure strain were treated three months after mycorhization with V. dahliae. It was found that...
L'association mycorhizienne avec les racines des plantes terrestres existe depuis des centaines de millions d'années et comporte des associations avec d'autres groupes fonctionnels de microorganismes du sol. De nombreux travaux ont montré que les bactéries rhizosphériques sont étroitement associées au mycélium des champignons mycorhiziens arbuscula...
Ulvan, carrageenan, alginate and laminarin were tested in olive trees’ twigs to elicit phenolic metabolism and control verticillium wilt of olive (VWO) caused by Verticillium dahliae. The elicitation effect was determined through phenylalanine ammonia-lyase activity, total polyphenol content and lignin content. VWO was assessed in twigs previously...
La picholine marocaine (Olea europea L.) représente plus de 80% de l'oléiculture au Maroc. Cette variété présente plusieurs avantages mais elle se révèle sensible à de nombreuses maladies dont la verticilliose. L'objectif de ce travail est d'étudier l'effet de deux types d'inoculum endomycorhizien, un inoculum autochtone (baptisé Rhizolive) et un i...
The efficacy of two algal saccharides, glucuronan and oligoglucuronans (average degree of polymerization = 3), against postharvest blue mold (Penicillium expansum) and gray mold (Botrytis cinerea) on apple fruit (Malus domestica Borkh. cv Golden Delicious) and the related-defense responses involved were evaluated. The severity of both blue and gray...
The effects of two algal saccharides, ulvan and oligoulvans (average degree of polymerization = 2), on defense-related responses and decay development in apple fruit (Malus domestica Borkh. cv Golden Delicious) were investigated. Our results show that both ulvan and oligoulvans reduced significantly (P < 0.05) lesion diameter in inoculated fruit. D...
Poly- and oligosaccharides isolated from the green algae Ulva lactuca were tested for their capacity elicitor of natural defences in tomato seedlings. After internodal infiltration of the bioelicitor solution in the midstem of tomato seedlings, the elicitor capacities were evaluated by determining the activity of phenylalanine ammonia-lyase (PAL) i...
The inoculation of the seedling roots of the resistant (Bousthami Noir) and susceptible (Jihel) date palm (Phoenix dactylifera) cultivars by Fusarium oxysporum f. sp. albedinis induced an increase in phenylalanine ammonia-lyase (PAL) activity. The response of the PAL activity in the resistant cultivar
was faster and higher than in the susceptible o...
In this study we determined whether contractile function becomes uncoupled during reperfusion of ischemic hearts from mitochondrial tricarboxylic acid (TCA) cycle activity or myocardial O2 consumption (MVO2). Isolated working rat hearts perfused with buffer containing 1.2 mM palmitate and 11 mM glucose were subjected to 30 min of global ischemia fo...