162 results match your criteria: "Centre of Biotechnology of Borj Cedria[Affiliation]"

This study aimed to evaluate the impact of four biochar concentrations (0, 2, 5, and 8%) on single and interactive effects of salinity and drought stresses on the morphological, physiological, and photosynthetic parameters of faba bean plants. PCA analysis showed that plants displayed different behavior under non-stressed and stressed conditions. The most discriminating quantitative characters were related to plant biomass production and photosynthesis, especially shoot dry mass, root dry mass, plant fresh mass, internal CO concentration, net CO assimilation rate, and relative water content.

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Phosphorus (P) is a macronutrient that plays a crucial role in critical plant functions. Phosphate transporters (PHTs) ensure the acquisition and translocation of Pi in the plant, thereby playing a key role in maintaining normal plant growth under Pi deficiency conditions. In Brachypodium distachyon, the grass model system, the function of individual PHT genes, remains largely unknown.

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Quinoa is an annual pseudocereal highly adapted to extreme environments and has become, at this point in time, an extremely popular food due to its exceptional and high nutritional quality. This study aims to investigate the association of quinoa salt tolerance at an early developmental stage with its grain nutritional value under the effect of severe climatic hurdles. The current findings revealed a significant variability between genotypes in salt response attributes at the first development stage, where genotypes Amarilla Sacaca (thereafter, ) and QQ57 exhibited high salt tolerance thresholds with a low salt sensitivity index (SI), and a high capacity for Na sequestration into vacuoles.

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Article Synopsis
  • Stilbenes are natural compounds that help plants adapt to stress, and this study focused on their role in drought tolerance in different grapevine varieties.
  • The research showed that water scarcity negatively affects grapevine growth and that the Syrah variety demonstrated better drought resistance than Razegui and Muscat d'Italie.
  • Increased levels of stilbenic compounds in the roots of Syrah correlated with higher antioxidant activity, suggesting these compounds could be important for grape breeding and sustainable farming in dry conditions.
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The management of cadmium-rich sludges, which are pollutant residues from the phosphorus industry, including the valorization of these sludges through the selective recovery of heavy metals, is a promising prospect. However, there is still a need to develop recovery methods that are both optimized for efficiency, cost-effectiveness, and environmentally friendly. This study aims to enhance cadmium extraction from the polymetallic sludge by optimizing the processes of sulfuric acid (SA) leaching and sodium sulfide precipitation.

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Tracking the trajectory of frankia research through bibliometrics: trends and future directions.

Can J Microbiol

December 2024

Department of Biological and Chemical Engineering, USCR Molecular Bacteriology and Genomics, National Institute of Applied Sciences and Technology, University of Carthage, Tunis, Tunisia.

Frankia represent a unique group of filamentous, sporangia-forming bacteria, renowned for their exceptional capacity to establish symbiotic partnerships with actinorhizal plants. The objective of this paper is to offer quantitative insights into the current state of frankia research and its future potential. A comprehensive bibliometric analysis covering the years 2000-2022 was conducted using Scopus and SciVal.

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sp. nov., efficient nodulating rhizobia isolated from roots in Tunisia.

Int J Syst Evol Microbiol

September 2024

Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cédria, BP 901 Hammam-lif 2050, Tunisia.

Article Synopsis
  • Researchers characterized three bacterial strains (1AS14I, 1AS12I, and 6AS6) from root nodules using various analytical techniques, revealing they belong to a distinct lineage within the rhizobia complex.
  • Phylogenetic analysis showed that these strains are closely related to a known species but maintain a sequence identity of only 96.4%, indicating they are not the same species.
  • The study proposes naming the new species as
  • [insert proposed name]
  • sp. nov., with strain 1AS14I as the type strain, enhancing our understanding of microbial diversity in nitrogen-fixing ecosystems in Tunisia.
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  • This study evaluated the antioxidant and antileishmanial effects of essential oil from Ballota (B.) hirsuta leaves, identifying spathulenol and germacrene D as its main components.
  • The essential oil demonstrated moderate antioxidant activity and high antileishmanial effectiveness against both promastigote and amastigote forms of Leishmania, with specific IC values indicating its potency.
  • The study also revealed that B. hirsuta EO primarily inhibits the sterol synthesis pathway and suggested that its main compounds may be promising candidates for developing treatments against leishmaniasis.
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The use of plant growth-promoting rhizobacteria (PGPR) in agriculture is one of the most promising approaches to improve plants' growth under salt stress and to support sustainable agriculture under climate change. In this context, our goal was to grow and enhance quinoa growth using native rhizobacteria that can withstand salt stress. To achieve this objective, we isolated rhizobacteria from three saline localities in a semi-arid region in Tunisia, which are characterized by different halophyte species and tested their plant growth-promoting (PGP) activities.

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As crucial stages in the plant ontogeny, germination and seedling establishment under adverse conditions greatly determine staple crop growth and productivity. In the context of green technologies aiming to improve crop yield, seed priming is emerging as an effective approach to enhance seed vigor and germination performance under salt stress. In this study, we assess the efficiency of seed priming with indole-3-acetic acid (IAA) in mitigating the adverse effects of salt stress on maize (Zea mays L.

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Cryopreservation is a reliable technique for the long-term storage and preservation of embryogenic cells, maintaining their viability without loss of their embryogenic capacity. However, the large-scale conservation of grapevine embryogenic lines in cryobanks remains limited. A significant challenge is understanding somatic cell rejuvenation.

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The aim of this study was to investigate whether silicon (Si) supply was able to alleviate the harmful effects caused by salinity stress on sorghum-sudangrass (Sorghum bicolor ×Sorghum sudanense ), a species of grass raised for forage and grain. Plants were grown in the presence or absence of 150mM NaCl, supplemented or not with Si (0.5mM Si).

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Increased soil salinization, tightly related to global warming and drought and exacerbated by intensified irrigation supply, implies highly detrimental effects on staple food crops such as wheat. The situation is particularly alarming for durum wheat (DW), better adapted to arid/semi-arid environments yet more sensitive to salt stress than bread wheat (BW). To enhance DW salinity tolerance, we resorted to chromosomally engineered materials with introgressions from allied halophytic species.

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Salinity and infection represent significant challenges for alfalfa cultivation in South Africa, Europe, Australia, and, particularly, Tunisia. These constraints have a severe impact on both yield and quality. The primary aim of this study was to establish the genetic basis of traits associated with biomass and growth of 129 genotypes through genome-wide association studies (GWAS) under combined salt and infection stresses.

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Salicylic Acid and Calcium Chloride Seed Priming: A Prominent Frontier in Inducing Mineral Nutrition Balance and Antioxidant System Capacity to Enhance the Tolerance of Barley Plants to Salinity.

Plants (Basel)

May 2024

Group of Fruit Trees Biotechnology, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), 30100 Murcia, Spain.

Article Synopsis
  • * Salinity leads to increased levels of sodium and oxidative stress indicators (electrolyte leakage and TBARS), while diminishing essential nutrient absorption like iron and calcium, alongside altering antioxidant enzyme activity based on salt concentration and the barley species involved.
  • * Pre-treating seeds with salicylic acid or calcium chloride helps restore nutrient balance and reduce oxidative damage, improving antioxidant enzyme activity and leading to better survival under salt stress, particularly benefiting one of the barley species more than the other.
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Article Synopsis
  • * Major compounds identified in the EO included α-pinene and -cadinol, but the oil showed limited antioxidant activity, failing to neutralize certain free radicals effectively.
  • * The EO demonstrated strong leishmanicidal effects against promastigote and amastigote forms, with the components showing better binding to the enzyme CYP51 compared to the conventional drug fluconazole, suggesting it could be a promising alternative treatment for leishmaniasis.
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Date palm cultivation has thrived in the Gulf Cooperation Council region since ancient times, where it represents a vital sector in agricultural and socio-economic development. However, climate change conditions prevailing for decades in this area, next to rarefication of rain, hot temperatures, intense evapotranspiration, rise of sea level, salinization of groundwater, and intensification of cultivation, contributed to increase salinity in the soil as well as in irrigation water and to seriously threaten date palm cultivation sustainability. There are also growing concerns about soil erosion and its repercussions on date palm oases.

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Impact of two sp. on the response of diverse genotypes under salt stress.

Physiol Mol Biol Plants

February 2024

Laboratory of Legumes and Sustainable Agroecosystems, Centre of Biotechnology of Borj-Cédria, BP 901, 2050 Hammam-Lif, Tunisia.

Unlabelled: Currently, salinization is impacting more than 50% of arable land, posing a significant challenge to agriculture globally. Salt causes osmotic and ionic stress, determining cell dehydration, ion homeostasis, and metabolic process alteration, thus negatively influencing plant development. A promising sustainable approach to improve plant tolerance to salinity is the use of plant growth-promoting bacteria (PGPB).

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Genotype-Dependent Response of Root Microbiota and Leaf Metabolism in Olive Seedlings Subjected to Drought Stress.

Plants (Basel)

March 2024

Departament of Microbiology, Soil System and Symbiosis, Zaidín Experimental Station, Spanish Reaserch Council (CSIC), Prof. Albareda 1, 18008 Granada, Spain.

Under stress or in optimum conditions, plants foster a specific guild of symbiotic microbes to strengthen pivotal functions including metabolic regulation. Despite that the role of the plant genotype in microbial selection is well documented, the potential of this genotype-specific microbial assembly in maintaining the host homeostasis remains insufficiently investigated. In this study, we aimed to assess the specificity of the foliar metabolic response of contrasting olive genotypes to microbial inoculation with wet-adapted consortia of plant-growth-promoting rhizobacteria (PGPR), to see if previously inoculated plants with indigenous or exogenous microbes would display any change in their leaf metabolome once being subjected to drought stress.

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The increasing interest in utilizing olive pomace bioactive molecules to advance functional elements and produce antioxidant and antimicrobial additives underscores the need for eco-friendly extraction and purification methods. This study aims to develop an eco-friendly extraction method to evaluate the effect of extraction parameters on the recovery of bioactive molecules from enriched olive pomace. The effects were identified based on total phenolic and flavonoid contents and antioxidant activity, employing a design of experimental methodology.

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Article Synopsis
  • - The study analyzed extracts of cypress from three regions in Tunisia (Bizerte, Ben Arous, and Nabeul) for their antioxidant and antibacterial properties, as well as their phenolic content.
  • - Bizerte's methanol extract showed the highest phenolic content (315.75 mg GAE/g DW), with cupressuflavone being the main compound (68%).
  • - The ethanol extract from Nabeul was particularly effective against Gram-positive bacteria, showing a significant inhibition zone of 40 mm, highlighting cypress as a promising source for natural antioxidants and antibacterial agents.
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Background And Aims: Intercropping is an agriculture system used to enhance the efficiency of resource utilization and maximize crop yield grown under environmental stress such as salinity. Nevertheless, the impact of intercropping forage legumes with annual cereals on soil salinity remains unexplored. This research aimed to propose an intercropping system with alfalfa (Medicago sativa)/sea barley (Hordeum marinum) to explore its potential effects on plant productivity, nutrient uptake, and soil salinity.

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Laboratory assessment of the acaricidal, repellent and anti-cholinesterase effects of Melaleuca alternifolia and Chamaemelum nobile essential oils against Hyalomma scupense ticks.

Vet Res Commun

June 2024

Laboratory of Functional Physiology and Valorization of Bio-Resources (LR23ES08), Higher Institute of Biotechnology of Beja, University of Jendouba, Habib Bourguiba Street, Box 382, 9000, Beja, Tunisia.

In cattle, Hyalomma scupense serves as an important vector of several pathogens resulting in diseases, subsequently affecting the agricultural field as well as the economy. Resistance to chemical acaricides has become widespread affirming the need for new drugs to tick control. The goal of this study was to investigate the acaricidal, repellent activities as well as the putative mode of action of two essential oils (EOs) from Melaleuca alternifolia (Tea tree) and Chamaemelum nobile (Roman chamomile) on Hyalomma scupense.

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Resveratrol and its derivatives are the most important phytoalexins with a crucial role in plant defense mechanisms. These compounds can occur either naturally or in response to abiotic stresses. Among them, salinity is one of the major threats to the sustainability and productivity of agro-economically important species, particularly those involved in the vini-viticulture sector.

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Silicon (Si) is the second most abundant element in the Earth's crust after oxygen. Its beneficial impact on crop development and yield, particularly under stressful conditions such as iron (Fe) deficiency, has been well documented. Fe deficiency is a critical constraint that limits crop production globally.

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