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A transcriptional cascade mediated by two APetALA2 family members orchestrates carotenoid biosynthesis in tomato

Journal of Integrative Plant Biology 2024年第6期66卷 1227-1241页

作者： Xiaoqing He Kaidong Liu Yi Wu Weijie Xu Ruochen Wang Julien Pirrello Mondher Bouzayen Mengbo Wu Mingchun Liu Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China Life Science and Technology School Lingnan Normal UniversityZhanjiang 524048China laboratoire de Recherche en Sciences vegetales—genomique et biotechnologie des Fruits—UMR5546 Universite de ToulouseCNRSUPSToulouse-INPToulouse 31013France

Carotenoids are important nutrients for human health that must be obtained from plants since they cannot be biosynthesized by the human *** the regulatory mechanism of carotenoid metabolism in plants represents the first step toward manipulating carotenoid contents in plants by molecular design *** this study,we determined that SlAP2c,an APetALA2(AP2)family member,acts as a transcriptional repressor to regulate carotenoid biosynthesis in tomato(Solanum lycopersicum).Knockout of SlAP2c in both the“Micro Tom”and“Ailsa Craig”backgrounds resulted in greater lycopene accumulation,whereas overexpression of this gene led to orange-ripe fruit with significantly lower lycopene contents than the wild *** established that SlAP2c represses the expression of genes involved in lycopene biosynthesis by directly binding to the cis-elements in their ***,SlAP2c relies on its EAR motif to recruit the co-repressors TOPLESS(TPL)2/4 and forms a complex with histone deacetylase(had)1/3,thereby reducing the histone acetylation levels of lycopene biosynthesis ***,SlAP2a,a homolog of SlAP2c,acts upstream of SlAP2c and alleviates the SlAP2c-induced repression of lycopene biosynthesis genes by inhibiting SlAP2c transcription during fruit ***,we identified a transcriptional cascade mediated by AP2 family members that regulates lycopene biosynthesis during fruit ripening in tomato,laying the foundation for the manipulation of carotenoid metabolism in plants.

关键词： APetALA2 family members carotenoid biosynthesis tomato transcriptional cascade

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Assessment of forest dieback on the Moroccan Central Plateau using spectral vegetation indices

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Journal of Forestry Research 2023年第3期34卷 793-808页

作者： Youssef Dallahi Amal Boujraf Modeste Meliho Collins Ashianga Orlando Laboratory of Microbial biotechnologies Agrosciences and Environment(BioMAgE)Faculty of Sciences SemlaliaCadi Ayyad UniversityMarrakechMorocco laboratoire des Productions végétale Animales et Agro-industrieEquipe de BotaniqueBiotechnologie et Protection des PlantesFacultédes SciencesUniversitéIbn TofailKenitraMorocco Sociétés TerritoiresHistoires et PatrimoinesFacultédes Lettres et des Sciences HumainesUniversitéMohammed VRabatMorocco Rabat Morocco

Cork oak forests in Morocco are rich in resources and services thanks to their great biological diversity,playing an important ecological and socioeconomic *** degradation of the forests has been accentuated in recent years by signifi cant human pressure and eff ects of climate change;hence,the health of the stands needs to be *** this study,the google Engine Earth platform was leveraged to extract the normalized diff erence vegetation index(NDvI)and soil-adjusted vegetation index,from Landsat 8 OLI/TIRS satellite images between 2015 and 2017 to assess the health of the Sibara Forest in *** results highlight the importance of interannual variations in NDvI in forest monitoring;the variations had a signifi cantly high relationship(pvely and negatively correlated with mean annual precipitation and mean annual temperature with respective coeffi cients of 0.49 and−0.67,highlighting its ability to predict phenotypic changes in forest *** interannual variation in NDvI between 2016 and 2017 seemed to confi rm fi eld observations of cork oak dieback in 2018,with the largest decreases in NDvI(up to−38%)in december in the most-aff ected *** of the infl uence of ecological factors on dieback highlighted the role of substrate as a driver of dieback,with the most severely aff ected plots characterized by granite-granodiorite substrates.

关键词： Forest health monitoring Remote sensing Dieback vegetation indices Sibara forest

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Morphological Identification of the Main Fungi Associated with Sesame in Burkina Faso

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American Journal of Plant Sciences 2023年第8期14卷 882-895页

作者： Dianyagou Paul Ouali Pawindé Elisabeth Zida Wendolian Romain Soalla Kuilpoko Marie Laure guissou laboratoire Sciences de la vie et de la Terre (LASvT) Université Norbert Zongo Koudougou Burkina Faso laboratoire de phytopathologie et de biotechnologie végétale Institut de l’Environnement et de Recherches Agricoles/CNRST Ouagadougou Burkina Faso

Several fungal species are responsible for diseases that damage sesame crop and cause production losses. These seed-borne fungi cause serious damage by reducing seed germination. To identify the fungi associated with sesame seeds in Burkina Faso, 72 sesame seed samples were collected from 24 localities in the main production areas (Sudanian zone, Sudano-Sahelian zone, Sahelian zone). These samples were submitted for seed health analysis using the blotting paper incubation method. The results obtained revealed that the seed samples were contaminated by various fungi, the main ones being: Fusarium spp. Link: Fr. infecting 97.22% of the samples, Macrophomina phaseolina (Tassi) goid. (90.28%), Alternaria sesamicola E. Kawamura (83.33%), Curvularia lunata (Wakker) Boedijn (76.39%), Cercospora sesami A. Zimmerm. (73.61%), Phoma sorghina Boerema, Dorenbosch, & van Kesteren (73.61%), Aspergillus flavus Link: Fr. (69.44%), Cladosporium sphaerospermum Penz. (56.94%), Rhizopus sp. Ehrenb. (40.28%) and A. niger Tiegh. (36.11%). In each seed sample, 0.25% to 94% of the seeds host one or more fungal species. Regarding the climatic zones, the results revealed that A. sesamicola and A. flavus were more represented in the Sudanian zone than in the Sudano-Sahelian and Sahelian zones;while P. sorghina, and C. sphaerospermum were more encountered in the Sahelian zone than in the other two zones. This study showed that the majority of sesame seeds produced and used by farmers in Burkina Faso host one or more species of fungi at high levels.

关键词： Sesame Fungi Associated with Seeds Seed Health Analysis Burkina Faso

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Purification Potential of Local Media in the Pre-Treatment of greywater Using vertical Biofilters under Sahelian Conditions

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Journal of Agricultural Chemistry and Environment 2022年第2期11卷 117-131页

作者： Cheik Omar Tidiane Compaoré Ynoussa Maiga Amidou S. Ouili Mahamadi Nikiema Aboubakar S. Ouattara laboratoire de Microbiologie et de biotechnologie Microbienne Université Joseph KI-ZERBO Ouagadougou Burkina Faso

Several on-site greywater treatment systems are under development including biofiltration, whose efficiency is influenced by the filter media. Therefore, the main objective of this study was to evaluate the influence of the type of filter media and their grain size in the removal of organic and microbial pollutants from greywater. Hence, three types of local filter media of different grain size were used for the pre-treatment of greywater. Their removal potential and clogging time were evaluated and compared. The results indicated that the type of filter media and the grain size have an influence on the elimination of organic and microbial pollution from greywater. Indeed, sand of 1 - 2 mm in size obtained the highest removal efficiencies of organic pollutants (67.35% and 78.04% for COD and BOD5 respectively) and microbial indicators (2.07, 1.77 and 2.27 log. units for E. coli, fecal coliforms and enterococci respectively). Although media of fine texture enhanced the removal efficiencies, they experienced significant clogging problems. To overcome these limitations while enhancing the removal efficiency, 1) pre-treatment stage with coarse materials followed by a treatment with finer materials or 2) the use of a combination of fine and coarse materials should be considered.

关键词： Biofiltration Fecal Indicators granitic gravel greywater Lateritic gravel Sand

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Morphological and Molecular Identification of Fungi Associated with Sesame Diseased Plants of the Three Agroclimatic Zones of Burkina Faso

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American Journal of Plant Sciences 2023年第3期14卷 290-307页

作者： Wendolian Romain Soalla Pawindé Elisabeth Zida Bouma James Neya Kadidia Koita laboratoire de phytopathologie Institut de l’Environnement et de Recherches Agricoles (INERA) Ouagadougou Burkina Faso laboratoire Biosciences Université Joseph Ki-ZERBO Ouagadougou Burkina Faso

Sesame is Burkina Faso’s second essential agricultural export after cotton. It’s consequently a supply of income for producers and foreign exchange for the country. However, sesame production is characterized by low average yields of about 538 kg·ha-1 at the farmer’s field as compared to the potential yield of the improved varieties (1500 - 2000 kg·ha-1). Fungal diseases are some of the major constraints to sesame production in Burkina Faso. The present study contributes to the development of means to control pathogenic fungi of this crop, which are responsible for significant losses. The objective is to identify the fungi associated with diseased sesame plant samples. To this end, 149 samples of diseased sesame plants were collected from different production sites located in three agro-climatic zones of the country. The analysis of the samples according to the blotting paper method, based on the morphological characteristics of the fungi, allowed the identification of 18 genera with prevalence rates from 2.68% to 97.98%. The most frequently identified genera were Macrophomina (97.98%), Cercospora (86.57%), Fusarium (85.23%), Phoma (62.41%) and Colletotrichum (61.07%). The results also showed a variable distribution of fungi according to the agro-climatic zone with the predominance of Macrophomina in all three zones. Molecular identification by DNA sequencing of 120 isolates belonging to the different fungi detected allowed the identification of 25 species of which the most representative were Macrophomina phaseolina, Cercospora sesami, Corynespora cassiicola, Alternaria simsimi, Alternaria porri, Fusarium oxysporum, F. fujikuroi, F. equiseti, Colletotrichum capsici, and C. gloesporiodes. The present study showed that diseased sesame plants collected from different production sites in Burkina Faso housed several species of fungi. The fungi presence in diseased plants indicates the need to inform and raise the stakeholders’ awareness about the p

关键词： Burkina Faso Fungi Molecular Identification Morphological Identification Sesame

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Taxonomy of the lesser jerboa Jaculus jaculus (Dipodidae,Rodentia) based on allozymic and morphological variation

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Current Zoology 2010年第4期56卷 421-431页

作者： Abderraouf BEN FALEH Abdelwaheb BEN OTHMEN Khaled SAID génétique Biodiversité et Valorisation des Bio-ressources (UR03ES09) Institut Supérieur de Biotechnologie de Monastir 5000 génétique Biodiversité Valorisation des Bio-ressources (UR03ES09) Institut Supérieur de Biotechnologie de Monastir 5000

The lesser Egyptian jerboa Jaculus jaculus, is a member of the subfamily Dipodinae, known to have a number ofsubspecies. Previous studies of J. jaculus from North Africa found various morphological forms of unknown taxonomic status,which are frequently grouped into two taxa: J. jaculus and J. deserti. We assessed the taxonomic status of this taxon in Tunisiausing allozymic (phylogenetic analysis of 23 genetic loci encoding 16 enzymatic proteins) and morphological (multivariateanalysis of 13 craniodental characters) analyses of 136 J. jaculus specimens collected from seven localities within its distributionrange. Allozymic analysis clearly indicated the existence of two distinct groups of J. jaculus, with a mean genetic distance (D)value of 0.99 and F_(ST)=0.52. Individuals within the two groups did not show any obvious geographical structuration, even withinthe Matmata locality which represents the meeting point for the two groups where they were found in sympatry. Additionally,morphometric analysis of 13 craniodental characters was clearly separated the two groups. These results were obtained over avery restricted area of the total distribution of J. jaculus and strongly suggest the occurrence of two separate and often sympatricspecies within the currently accepted J. jaculus in Tunisia: J. jaculus and J. deserti .

关键词：等位酶分析形态学变化分类地位跳鼠基础平均遗传距离分布范围多元分析

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Fungal diversity in adult date palm(Phoenix dactylifera L.) revealed by culture-dependent and culture-independent approaches

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第12期14卷 1084-1099页

作者： Ines BEN CHOBBA Amine ELLEUCH Imen AYADI Lamia KHANNOUS Ahmed NAMSI Frederique CERQUEIRA Noureddine DRIRA Néji gHARSALLAH Tatiana vALLAEYS laboratoire de biotechnologies végétales Appliquées à l'Amélioration des Cultures LBvAAC Faculté des Sciences de SfaxB.P. 1171 3000 Sfax Tunisia UMR 5119 Université de Montpellier 2 Sciences et Techniques pl E. BataillonCC093 34095 Montpellier France laboratoire de Microorganismes et de Biomolécules Centre de Biotechnologie de Sfax Université de Sfax Route Sidi MansourB.P. 1177 3018 Sfax Tunisia laboratoire de phytopathologie Oasienne Centre Régional de Recherches en Agriculture Oasienne à DegacheDegache 2260 Tunisia Plateforme Séquen age-génotypage SFR "Montpellier Environnement Biodiversité" ISEM Université de Montpellier 234095 Montpellier France

Endophytic flora plays a vital role in the colonization and survival of host plants, especially in harsh environments, such as arid regions. This flora may, however, contain pathogenic species responsible for various troublesome host diseases. The present study is aimed at investigating the diversity of both cultivable and non-cultivable endophytic fungal floras in the internal tissues(roots and leaves) of Tunisian date palm trees(Phoenix dactylifera). Accordingly, 13 isolates from both root and leaf samples, exhibiting distinct colony morphology, were selected from potato dextrose agar(PDA) medium and identified by a sequence match search wherein their 18S–28S internal transcribed spacer(ITS) sequences were compared to those available in public databases. These findings revealed that the cultivable root and leaf isolates fell into two groups, namely Nectriaceae and Pleosporaceae. Additionally, total DNA from palm roots and leaves was further extracted and ITS fragments were amplified. Restriction fragment length polymorphism(RFLP) analysis of the ITS from 200 fungal clones(leaves: 100; roots: 100) using HaeIII restriction enzyme revealed 13 distinct patterns that were further sequenced and led to the identification of Alternaria, Cladosporium, Davidiella(Cladosporium teleomorph), Pythium, Curvularia, and uncharacterized fungal endophytes. Both approaches confirmed that while the roots were predominantly colonized by Fusaria(members of the Nectriaceae family), the leaves were essentially colonized by Alternaria(members of the Pleosporaceae family). Overall, the findings of the present study constitute, to the authors' knowledge, the first extensive report on the diversity of endophytic fungal flora associated with date palm trees(P. dactylifera).

关键词： Date palm tree(Phoenix dactylifera) Endophytic cultivable fungi rDNA internal transcribed spacer(ITS) Phylogenetic analysis Total DNA diversity analysis

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Concurrent PIEZO1 activation and ATP2B4 blockade effectively reduce the risk of cerebral malaria and inhibit in vitro Plasmodium falciparum multiplication in red blood cells

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genes & Diseases 2023年第6期10卷 2210-2214页

作者： Mathieu Adjemout Bruno Pouvelle Fatou Thiam Alassane Thiam Magali Torres Samia Nisar Babacar Mbengue Alioune Dieye Pascal Rihet Sandrine Marquet Institut National de la Santéet de la Recherche Médicale(INSERM) UnitéMixte de Recherche(UMR)U1090Aix Marseille UniversitéTAGC Theories and Approaches of Genomic ComplexityInstitut MarMaRaMarseilleFrance groupe de Recherche biotechnologie Appliquée et Bioprocédés Environnementaux(gRBA-BE) Ecole Supérieure PolytechniqueUniversitéCheikh Anta Diop de DakarDakar BP5005Senegal Pole D’Immunophysiopathologie&Maladies Infectieuses(IMI) Institut Pasteur de DakarDakar BP 220Senegal Service D’Immunologie UniversitéCheikh Anta Diop de DakarDakar BP5005Senegal Aix Marseille University CNRSMarseille 13009France

Malaria caused by the Plasmodium falciparum parasite is responsible for more than 240 million cases per year and killed 627,000 people in 2020,mostly African *** malaria parasite is transmitted by mosquitos belonging to the genus *** an asymptomatic liver stage,the parasite is released into the bloodstream to invade red blood cells(RBCs)and replicate *** erythrocytic phase is associated with a variety of clinical manifestations,including mild and severe *** malaria(CM)is one of the most severe forms,characterized by the sequestration of parasitized RBCs in the small capillaries of the brain and the local development of cytokine-mediated *** variants in genes encoding proteins involved in red blood cell physiology are protective factors against severe malaria,as clearly demonstrated for the sickle cell variant of hemoglobin(HbS).

关键词： malaria falciparum Plasmodium

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Photocatalytic degradation of 4-chlorophenol under P-modified TiO2/Uv system: Kinetics, intermediates, phytotoxicity and acute toxicity

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Journal of Environmental Sciences 2012年第3期24卷 479-487页

作者： Kais Elghniji Olfa Hentati Najwa Mlaik Ayman Mahfoudh Mohamed Ksibi University of Sfax Laboratoire EauEnergie et Environnement ENISB.P 11733038 SfaxTunisia Institut Supe'rieur de biotechnologie de Sfax B.P 1175 3038 SfaxTunisia

A series of phosphorus-modified titanium dioxide samples with varying P/Ti atomic ratio were conveniently prepared via a conventional solgel route. The effects of phosphorus content and calcination temperature on the crystalline structure, grain growth, surface area, and the photocatalytic activity of P-modified TiO2 were investigated. The XRD results showed that P species slow down the particle growth of anatase and increase the anatase-to-rutile phase transformation temperature to more than 900°C. Kinetic studies on the P-modified TiO2 to degraded 4-chlorophenol had found that the TP5500 prepared by adopting a P/Ti atomic ratio equal to 0.05 and calcined at 500°C had an apparent rate constant equal to 0.0075 min 1, which is superior to the performance of a commercial photocatalyst degussa P25 Kapp = 0.0045 min 1 and of unmodified TiO2 （TP0500） Kapp = 0.0022 min 1. From HPLC analyses, various hydroxylated intermediates formed during oxidation had been identified, including hydroquinone （HQ）, benzoquinone （BQ） and （4CC） 4-chlorocatechol as main products. Phytotoxicity was assessed before and after irradiation against seed germination of tomato （Lycopersicon esculentum） whereas acute toxicity was assessed by using Folsomia candida as the test organism. Intermediates products were all less toxic than 4-chlorophenol and a significant removal of the overall toxicity was accomplished

关键词： P-modified TiO2 photocatalyst 4-chlorophenol acute toxicity germination

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Identification of Bacteria Strains Isolated in Urinary Tract Infections and Their Antibiotic Susceptibility at the National Public Health Laboratory, Ouagadougou

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Open Journal of Medical Microbiology 2022年第3期12卷 83-95页

作者： Sandrine Ouedraogo Dissinviel Stéphane Kpoda Lamoussa Paul Ouattara Cheikna Zongo Yéri Esther Hien Paulette Karfo Désiré Nezien Elie Kabre Algas Barreda Pillar Aly Savadogo laboratoire de Biochimie et Immunologie Appliquées (LABIA) Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Centre Universitaire de Ziniare (CU-Z) Université Joseph Ki-Zerbo Ouagadougou Burkina Faso laboratoire de Microbiologie et de biotechnologie Microbienne (LAMBM) Université Joseph Ki-Zerbo Ouagadougou Burkina Faso laboratoire des Substances Naturelles et des Technologies des Produits Naturels et de l’Environnement (LABTECH-PRONE) Institut de Recherche en Sciences Appliquées et Technologies (IRSAT) Centre National de la Recherche Scientifique et Technologique (CNRST) Ouagadougou Burkina Faso laboratoire National de Santé Publique (LNSP) Ouagadougou Burkina Faso

Background: Urinary tract infections are still a real public health concern. The aim of this study was to identify the bacteria strains involved in urinary tract infections and to determine their antibiotic resistance profiles. Methods: Two kinds of studies were performed. The retrospective study was carried out for 2 years (from January 2018 to december 2019), and the prospective study was extended over a period of 6 months (from January to June 2020). Isolation and identification of bacteria strains were performed using conventional microbiology techniques. The strains’ resistance profiles were determined by the diffusion method on Mueller-Hinton according to the criteria of EUCAST- 2015. Fourteen (14) antibiotic discs were used depending on the isolated germ. Results: A total of 187 bacterial strains were isolated from 82 men and 105 women. Among the germs identified, 77.54% were Enterobacteriaceae and 13.36% were cocci strains. Non-fermentative gram-negative bacilli accounted for 9.08% of the isolated bacteria. The results showed that the majority of Enterobacteriaceae strains were resistant to beta-lactams: 100% to amoxicillin, 98.75% to amoxicillin + clavulanic acid, 41.76% to ceftriaxone, and 43.14% to ceftazidime. These findings were obtained with fluoroquinolones and aminoglycosides: 50.09% with ciprofloxacin, 54.04% with norfloxacin, and 22.58% with amikacin. 8.75% of the Enterobacteriaceae strains tested were resistant to imipenem. The same trends were observed with non-fer- mentative bacteria. As for the gram-positive bacteria isolated during our study, 13.33% were resistant to vancomycin, 21.05% to gentamicin, 94.12% to penicillin g, 88.89% to ampicillin, 77.78% to cefotaxime, 63.63% to kanamycin, and 52.63% to erythromycin. Conclusion: This study revealed, as in other studies, that Enterobacteriaceae strains remain the most incriminated bacteria strains in urinary tract infections, with a strong resistance to antibiotics. It is important that actions b

关键词： Urinary Tract Infections Enterobacteriaceae Antibiotic Resistance Ouagadougou

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