A5021747251- Plant Virus Research Studies
- Cocoa and Sweet Potato Agronomy
- Phytoplasmas and Hemiptera pathogens
- Insect-Plant Interactions and Control
- Coconut Research and Applications
- Agricultural pest management studies
- Trypanosoma species research and implications
- Oil Palm Production and Sustainability
- Plant Pathogenic Bacteria Studies
- Peanut Plant Research Studies
- Agriculture and Rural Development Research
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Interactions Research
- Legume Nitrogen Fixing Symbiosis
- Hemiptera Insect Studies
- Banana Cultivation and Research
- Date Palm Research Studies
- Insect symbiosis and bacterial influences
- African Botany and Ecology Studies
- Research on scale insects
- Cassava research and cyanide
- Advances in Cucurbitaceae Research
- Mosquito-borne diseases and control
- Insect behavior and control techniques
- Agronomic Practices and Intercropping Systems
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2008-2022
Agropolis International
2018
Centre Occitanie-Montpellier
2014
Forests and Societies
2009
University of California, Los Angeles
2000-2001
Laboratoire de Chimie Physique et Microbiologie pour l'Environnement
1987-1999
Territoires
1994-1995
Centre National de la Recherche Scientifique
1980-1993
Institut de Biologie Moléculaire des Plantes
1993
Sciences pour L’Œnologie
1992
Beneficial microbes in the microbiome of plant roots improve health. Induced systemic resistance (ISR) emerged as an important mechanism by which selected growth–promoting bacteria and fungi rhizosphere prime whole body for ...Read More
Members of the family Trypanosomatidae infect many organisms, including animals, plants and humans. Plant-infecting trypanosomes are grouped under single genus Phytomonas, failing to reflect wide biological pathological diversity these protists. While some Phytomonas spp. multiply in latex plants, or fruit seeds without apparent pathogenicity, others colonize phloem sap afflict substantial economic value, coffee tree, coconut oil palms. Plant have not been studied extensively at genome...
In this study, the taxonomic position and group classification of phytoplasma associated with a lethal yellowing-type disease (LYD) coconut (Cocos nucifera L.) in Mozambique were addressed. Pairwise similarity values based on alignment nearly full-length 16S rRNA gene sequences (1530 bp) revealed that (LYDM) shared 100% identity comparable sequence derived from strain (LDN) responsible for Awka wilt Nigeria, 99.0-99.6% strains Cape St Paul (CSPW) Ghana Côte d'Ivoire. Similarity scores...
A new species of cixiid planthopper (Hemiptera: Fulgoroidea) in the genus Oecleus Stål, sergipensis n. sp., is described from Sergipe State, Brazil. This taxon associated with coconut (Cocos nucifera L.) and date palm (Phoenix L). The was detected Auchenorrhyncha surveys to find potential vectors lethal yellowing type syndrome. first report Sequence data mitochondrial cytochrome c oxidase subunit I (COI) barcoding region obtained accessioned into GenBank.
A mechanically transmissible soil-borne virus causing peanut clump disease in Upper Volta is described. It infected mainly species of Chenopodia-ceae and was propagated Chenopodium amaranticolor. Infectivity lost from sap C. amaranticolor after 10 min at 64 °C, dilution to 10-5 but not io-4. purification procedure The particles are rod-shaped two predominant lengths, 190 245 nm. serologically related tobacco rattle, pea early-browning, or wheat mosaic viruses, a associated with rhizomania-like beet.
ABSTRACT. We have determined the sequences of 5S rRNA and spliced leader (SL) RNA genes, adjacent intergenic regions for representatives all known trypanosomatid genera parasitizing insects. The genetic loci been analyzed separately as well by a combined approach. Several isolates, assigned morphology to different ( Leptomonas spp., Blastocrithidia spp.), seem belong single species with an unexpectedly wide host geographical range. An unnamed isolated from rats in Egypt was found genus...
The complete nucleotide sequence of RNA 1 the tentative furovirus peanut clump virus (PCV) has been determined by characterization cloned cDNA and direct sequencing. is 5897 nucleotides in length contains three long open reading frames (ORFs). 5′ -terminal proximal ORF potential to encode a polypeptide M r 130942 (P131) containing methyltransferase helicase homologous domains displaying homology with large nonstructural proteins alpha-like viruses, which are known or thought be involved...
ABSTRACT Severely immunocompromised human immunodeficiency virus (HIV) patients can develop various opportunistic infections due to bacteria, viruses, fungi, or protozoa. Here we report the first isolation of a flagellated protozoan genetically closely related Herpetomonas samuelpessoai , which is usually parasite insects, from blood an HIV-infected patient.
Summary Electron microscopy of purified particles a virus found in Digitaria sanguinalis from Vanuatu (formerly New Hebrides) indicated that it is geminivirus. Preparations contained one coat protein mol. wt. about 27500 and circular linear single-stranded DNA 2350 nucleotides length. In thin sections infected cells, geminate were crystalline arrays both nuclei the cytoplasm. The serologically related to maize streak but differs with serological differentiation index 3.
ABSTRACT Trypanosomatids recently isolated from the plants Euphorbia pinea, E. characias, hyssopifolia, Manihoi esculenta (cassava) and Lycopersicon sp. (tomato) plus McGhee‐Postell isolate of Phytomonas davidi have been examined for presence enzymes ornithine‐arginine metabolism. Arginase (EC 3.5.3.1) was not detected in flagellates whereas arginine deiminase 3.5.3.6) citrullinehydrolase 3.5.1.20) were present all organisms. hyssopifolia , besides these enzymes, also had ornithine...
Coconut palms (Cocos nucifera L.) can be affected by several types of Lethal Yellowing (LY) diseases worldwide. Some the syndromes are caused phytoplasmas, small bacteria that impossible to detect light microscopy. Amplification a given gene phytoplasmas polymerase chain reaction (PCR) is most convenient diagnosis method. The problem there at least 28 "groups" and only one pair primers -P1/P7- commonly used for PCR. As these belong very conserved gene, false positives frequent. Consequently,...
The arbitrary genus Phytomonas includes a biologically diverse group of kinetoplastids that live in wide variety plant environments. To understand better the subdivisions within phytomonads and variability groups, exon, intron non-transcribed spacer sequences spliced leader RNA gene were compared among isolates phloem-restricted members. A total 29 associated with disease coconut, oil palm red ginger (Alpinia purpurata, Zingibreaceae) examined, all originating from plantations South America...
The Cape Saint Paul Wilt Disease (CSPWD) is a coconut lethal yellowing type disease (LY) and the single most serious threat to cultivation in Ghana. recommended management strategy of disease-resistant varieties. More than 38 varieties have been screened for their resistance CSPWD since 1956 results are reviewed this paper. Two varieties, Sri Lanka Green Dwarf (SGD) Vanuatu Tall (VTT), shown high disease, hybrid (SGD × VTT) under observation determine its performance. A programme...
Trypanosomatids isolated from plants have been assigned typically into the genus Phytomonas. Such designations do not reflect biology of diverse isolates; confusion may arise due to transient presence in monogenetic (insect) trypanosomatids deposited by phytophagous bugs. To develop further molecular markers for plant kinetoplastids, we obtained DNA sequence 5S ribosomal RNA gene 24 isolates harvested phloem, latex, and fruit. Small, distinct differences were found at 3'-ends transcribed...