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Maureen Leyva - One of the best experts on this subject based on the ideXlab platform.
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melaleuca quinquenervia cav s t blake Myrtales myrtaceae natural alternative for mosquito control
Asian Pacific Journal of Tropical Medicine, 2016Co-Authors: Maureen Leyva, Mayda Castex, Domingo Montada, Felipe Quintana, Leidys Frenchpacheco, Ariel Mejias Hernandez, Maria Del Carmen MarquettiAbstract:Abstract Objective To evaluate an essential oil with larvicide, adulticide and growth inhibitory activity against Aedes aegypti, Aedes albopictus and Culex quinquefasciatus mosquitoes, of medical importance. Methods Standardized methodology by WHO was used to determine the levels of susceptibility of mosquito larvae exposed to the essential oil. To evaluate the adulticide activity with the essential oil at different doses, bottles were impregnated according to the methodology CDC. To determine the development inhibitory activity of Melaleuca quinquenervia ( M. quinquenervia) oil in three mosquito species, third instar larvae were exposed to the LC 50 and LC 90 dose (calculated for each population) of M. quinquenervia oil in glass containers with a capacity of 500 mL. After 24 h exposure, the dead larvae were discarded. The mortality of larvae and pupae were recorded on a daily basis. Results The calculated LC 50 indicates an order of effectiveness of preferential oil for Culex quinquefasciatus (LC 50 = 0.002 1%), Aedes aegypti (LC 50 = 0.004 7%) and Aedes albopictus (LC 50 = 0.004 9%). Conclusions The adulticide activity was achieved with impregnated bottles at 40 and 50 mg/mL with the three mosquitoes species. In larvae, a growth inhibition was detected when exposed to sublethal doses. The results indicate that M. quinquenervia is a plant with promising environmentally sustainable source for vector control.
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actividad repelente de formulaciones del aceite esencial de melaleuca quinquenervia cav s t blake Myrtales myrtaceae en mosquitos
Gaceta Sanitaria, 2012Co-Authors: Maureen Leyva, Mayda Castex, Domingo Montada, Felipe Quintana, Diosanys Lezcano, Maria Del Carmen, Ariamys Companioni, Jorge Anaya, Ivan Gonzalez, Calle N NAbstract:Repellent anctivity of essential oils formulations from Melaleuca quinquenervia (Cav.) S.T. Blake (Myrtales: Myrtaceae) on mosquitoes
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composicion quimica y efecto letal del aceite esencial de pimenta racemosa Myrtales myrtaceae sobre blattella germanica dictyoptera blattellidae
Revista Cubana de Medicina Tropical, 2007Co-Authors: Maureen Leyva, Juan E Tacoronte, Maria Del Carmen MarquettiAbstract:Se examino mediante un analisis GC y GC-MS (cromatografia gaseosa-espectrometria de masa), el aceite esencial extraido de hojas de Pimenta racemosa (Mill.) J.W. Moore (Myrtales: Myrtaceae). Se identificaron un total de 26 compuestos volatiles que representaron 99,5 % de la composicion total; los de mayor proporcion resultaron el terpinen-4-ol y 1,8-cineol. Se realizaron bioensayos al nivel de laboratorio con 5 dosificaciones de este aceite sobre la cucaracha Blattella germanica, se encontraron valores de DL 50 = 15,55 % y DL 95 = 48,16 % mediante un analisis probit-log, asi como una dosis diagnostica de 2 μg/insecto del aceite a 50 %, que se propone para la vigilancia en el terreno del uso de formulaciones en programas de lucha contra este insecto.
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chemical composition and lethal effect of essential oil from pimenta racemosa Myrtales myrtaceae on blatella germanica dictyoptera blattellidae
Revista Cubana de Medicina Tropical, 2007Co-Authors: Maureen Leyva, Juan E Tacoronte, Maria Del Carmen MarquettiAbstract:Gas chromatography test and Gas chromatography/mass spectrometry test allowed examining the essential oil from Pimenta racemosa leaves (Mill.) J.W. Moore (Myrtales: Myrtaceae). A total of 26 volatile compounds representing 99.5% of the whole composition were identified, being ternipen 4-ol and 1.8 cineol those having the largest portions. Lab bioassays were performed with 5 different oil doses on Blattella germanica. DL50, 15.55 and DL95 = 48.16% were estimated by a probit-log analysis as well as diagnostic dose of 2 microg/insect of 50% oil that is recommended for field surveillance of the use of various formulations in insect control programs.
Maria Del Carmen Marquetti - One of the best experts on this subject based on the ideXlab platform.
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melaleuca quinquenervia cav s t blake Myrtales myrtaceae natural alternative for mosquito control
Asian Pacific Journal of Tropical Medicine, 2016Co-Authors: Maureen Leyva, Mayda Castex, Domingo Montada, Felipe Quintana, Leidys Frenchpacheco, Ariel Mejias Hernandez, Maria Del Carmen MarquettiAbstract:Abstract Objective To evaluate an essential oil with larvicide, adulticide and growth inhibitory activity against Aedes aegypti, Aedes albopictus and Culex quinquefasciatus mosquitoes, of medical importance. Methods Standardized methodology by WHO was used to determine the levels of susceptibility of mosquito larvae exposed to the essential oil. To evaluate the adulticide activity with the essential oil at different doses, bottles were impregnated according to the methodology CDC. To determine the development inhibitory activity of Melaleuca quinquenervia ( M. quinquenervia) oil in three mosquito species, third instar larvae were exposed to the LC 50 and LC 90 dose (calculated for each population) of M. quinquenervia oil in glass containers with a capacity of 500 mL. After 24 h exposure, the dead larvae were discarded. The mortality of larvae and pupae were recorded on a daily basis. Results The calculated LC 50 indicates an order of effectiveness of preferential oil for Culex quinquefasciatus (LC 50 = 0.002 1%), Aedes aegypti (LC 50 = 0.004 7%) and Aedes albopictus (LC 50 = 0.004 9%). Conclusions The adulticide activity was achieved with impregnated bottles at 40 and 50 mg/mL with the three mosquitoes species. In larvae, a growth inhibition was detected when exposed to sublethal doses. The results indicate that M. quinquenervia is a plant with promising environmentally sustainable source for vector control.
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composicion quimica y efecto letal del aceite esencial de pimenta racemosa Myrtales myrtaceae sobre blattella germanica dictyoptera blattellidae
Revista Cubana de Medicina Tropical, 2007Co-Authors: Maureen Leyva, Juan E Tacoronte, Maria Del Carmen MarquettiAbstract:Se examino mediante un analisis GC y GC-MS (cromatografia gaseosa-espectrometria de masa), el aceite esencial extraido de hojas de Pimenta racemosa (Mill.) J.W. Moore (Myrtales: Myrtaceae). Se identificaron un total de 26 compuestos volatiles que representaron 99,5 % de la composicion total; los de mayor proporcion resultaron el terpinen-4-ol y 1,8-cineol. Se realizaron bioensayos al nivel de laboratorio con 5 dosificaciones de este aceite sobre la cucaracha Blattella germanica, se encontraron valores de DL 50 = 15,55 % y DL 95 = 48,16 % mediante un analisis probit-log, asi como una dosis diagnostica de 2 μg/insecto del aceite a 50 %, que se propone para la vigilancia en el terreno del uso de formulaciones en programas de lucha contra este insecto.
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chemical composition and lethal effect of essential oil from pimenta racemosa Myrtales myrtaceae on blatella germanica dictyoptera blattellidae
Revista Cubana de Medicina Tropical, 2007Co-Authors: Maureen Leyva, Juan E Tacoronte, Maria Del Carmen MarquettiAbstract:Gas chromatography test and Gas chromatography/mass spectrometry test allowed examining the essential oil from Pimenta racemosa leaves (Mill.) J.W. Moore (Myrtales: Myrtaceae). A total of 26 volatile compounds representing 99.5% of the whole composition were identified, being ternipen 4-ol and 1.8 cineol those having the largest portions. Lab bioassays were performed with 5 different oil doses on Blattella germanica. DL50, 15.55 and DL95 = 48.16% were estimated by a probit-log analysis as well as diagnostic dose of 2 microg/insect of 50% oil that is recommended for field surveillance of the use of various formulations in insect control programs.
Kenneth J. Sytsma - One of the best experts on this subject based on the ideXlab platform.
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Summary of major relationships within Myrtales.
2017Co-Authors: Ricardo Kriebel, Mohammad Khabbazian, Kenneth J. SytsmaAbstract:Major relationships within Myrtales showing three possible placements of Combretaceae (summarized in [39]). A: Phylogeny with the family Combretaceae sister to the rest of the order. B: Phylogeny with the family Combretaceae sister to Lythraceae + Onagraceae. C: Phylogeny with the family Combretaceae as sister to rest of the order excluding Lythraceae + Onagraceae.
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Examples of pollen grains in Myrtales.
2017Co-Authors: Ricardo Kriebel, Mohammad Khabbazian, Kenneth J. SytsmaAbstract:Scanning electron micrographs of pollen grains from selected species of Myrtales. Representing the CAP clade is Saltera sarcocolla; Bucida macrostachya in equatorial view and Conocarpus erecta in polar view (Combretaceae); Heimia salicifolia (Lythraceae); Miconia alypifolia in equatorial view and Miconia caesia in polar view for (Melastomaceae); Tristania conferta (Myrtaceae); Calylophus toumeyi (Onagraceae). Scale bars are 5 um except for Onagraceae which is 50 um. Adapted from [50] with permission from the Annals of the Missouri Botanical Garden Press.
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A continuous morphological approach to study the evolution of pollen in a phylogenetic context: An example with the order Myrtales
2017Co-Authors: Ricardo Kriebel, Mohammad Khabbazian, Kenneth J. SytsmaAbstract:The study of pollen morphology has historically allowed evolutionary biologists to assess phylogenetic relationships among Angiosperms, as well as to better understand the fossil record. During this process, pollen has mainly been studied by discretizing some of its main characteristics such as size, shape, and exine ornamentation. One large plant clade in which pollen has been used this way for phylogenetic inference and character mapping is the order Myrtales, composed by the small families Alzateaceae, Crypteroniaceae, and Penaeaceae (collectively the “CAP clade”), as well as the large families Combretaceae, Lythraceae, Melastomataceae, Myrtaceae, Onagraceae and Vochysiaceae. In this study, we present a novel way to study pollen evolution by using quantitative size and shape variables. We use morphometric and morphospace methods to evaluate pollen change in the order Myrtales using a time-calibrated, supermatrix phylogeny. We then test for conservatism, divergence, and morphological convergence of pollen and for correlation between the latitudinal gradient and pollen size and shape. To obtain an estimate of shape, Myrtales pollen images were extracted from the literature, and their outlines analyzed using elliptic Fourier methods. Shape and size variables were then analyzed in a phylogenetic framework under an Ornstein-Uhlenbeck process to test for shifts in size and shape during the evolutionary history of Myrtales. Few shifts in Myrtales pollen morphology were found which indicates morphological conservatism. Heterocolpate, small pollen is ancestral with largest pollen in Onagraceae. Convergent shifts in shape but not size occurred in Myrtaceae and Onagraceae and are correlated to shifts in latitude and biogeography. A quantitative approach was applied for the first time to examine pollen evolution across a large time scale. Using phylogenetic based morphometrics and an OU process, hypotheses of pollen size and shape were tested across Myrtales. Convergent pollen shifts and position in the latitudinal gradient support the selective role of harmomegathy, the mechanism by which pollen grains accommodate their volume in response to water loss.
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divergence times historical biogeography and shifts in speciation rates of Myrtales
Molecular Phylogenetics and Evolution, 2016Co-Authors: Ricardo Kriebel, Brent A Berger, Daniel Spalink, Kenneth J. SytsmaAbstract:We examine the eudicot order Myrtales, a clade with strong Gondwanan representation for most of its families. Although previous phylogenetic studies greatly improved our understanding of intergeneric and interspecific relationships within the order, our understanding of inter-familial relationships still remains unresolved; hence, we also lack a robust time-calibrated chronogram to address hypotheses (e.g., biogeography and diversification rates) that have implicit time assumptions. Six loci (rbcL, ndhF, matK, matR, 18S, and 26S) were amplified and sequenced for 102 taxa across Myrtales for phylogenetic reconstruction and ten fossil priors were utilized to produce a chronogram in BEAST. Combretaceae is identified as the sister clade to all remaining families with moderate support, and within the latter clade, two strongly supported groups are seen: (1) Onagraceae+Lythraceae, and (2) Melastomataceae+the Crypteroniaceae, Alzateaceae, Penaeaceae clade along with Myrtaceae+Vochysiaceae. Divergence time estimates suggest Myrtales diverged from Geraniales ∼124Mya during the Aptian of the Early Cretaceous. The crown date for Myrtales is estimated at ∼116Mya (Albian-Aptian). BioGeoBEARS showed significant improvement in the likelihood score when the "jump dispersal" parameter was added. South America and/or Africa are implicated as important ancestral areas in all deeper nodes. BAMM analyses indicate that the best configuration included three significant shifts in diversification rates within Myrtales: near the crown of Melastomataceae (∼67-64Mya), along the stem of subfamily Myrtoideae (Myrtaceae; ∼75Mya), and along the stem of tribe Combreteae (Combretaceae; ∼50-45Mya). Issues with conducting diversification analyses more generally are examined in the context of scale, taxon sampling, and larger sets of phylogenetic trees.
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interfamilial relationships in Myrtales molecular phylogeny and patterns of morphological evolution
Systematic Botany, 1997Co-Authors: Elena Conti, Shirley A. Graham, Amy Litt, Peter G Wilson, Barbara G Briggs, L A S Johnson, Kenneth J. SytsmaAbstract:Numerous phenotypic (morphological, palynological, cytological, and anatomical) studies have been conducted on Myrtales, yet the detailed relationships among the families of the order remain elusive. In this paper, the rbcL sequences of 50 taxa (39 representatives of Myrtales and 11 rosid outgroups) were analyzed using parsimony and maximum likelihood to provide a phylogenetic hypothesis of intraordi- nal relationships in Myrtales. The congruence between the phenotypic data from an earlier study and the rbcL topology was assessed to identify the potential synapomorphies that would corroborate the clades supported by the molecular tree. The rbcL consensus tree defined two major clades in the order. The first clade comprised a Myrtaceae lineage sister to a Melastomataceae lineage and the second clade included Onagraceae, a Lythraceae lineage, and Combretaceae. Phenotypic characters suggest that the ancestor of the first clade was characterized by the acquisition of fibrous seed exotegmen, while the ancestor of the second clade had flowers with stamens inserted directly on the rim of the hypanthium. However, branch support for the basal split of Myrtales is weak, possibly as a result of rapid early radiation in the order.
Kai Chen - One of the best experts on this subject based on the ideXlab platform.
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comparative analyses of chloroplast genomes from 13 lagerstroemia lythraceae species identification of highly divergent regions and inference of phylogenetic relationships
Plant Molecular Biology, 2020Co-Authors: Gang Zheng, Lingling Wei, Kai ChenAbstract:Seven divergence hotspots as plastid markers for DNA barcoding was selected, and the phylogeny of 13 Lagerstroemia species based on the cp genome data was reconstructed within Myrtales. The Lagerstroemia species used in this study originated in China and have high economic and ecological value. The shared interspecific morphological characteristics and intraspecific morphological variation resulting from hybridization among Lagerstroemia taxa have made resolving their classification problems and phylogenetic relationships difficult. Systematic comparative genomic analysis has been shown to resolve phylogenetic relationships. We sequenced and annotated 6 Lagerstroemia cp genomes (Lagerstroemia excelsa, Lagerstroemia limii, Lagerstroemia siamica, Lagerstroemia tomentosa, Lagerstroemia venusta, and Lagerstroemia calyculata) for the first time and combined them with previously published genomes for Lagerstroemia species. Bioinformatics was used to analyse the 13 cp genomes in terms of gene structure and organization, codon usage, contraction and expansion of inverted repeat regions, repeat structure, divergence hotspots, species pairwise Ka/Ks ratios and phylogenetic relationships. The length varied between 152,049 bp in Lagerstroemia subcostata and 152,521 bp in L. venusta. We selected seven divergence hotspots in the cp genomes that had the potential to act as plastid markers to distinguish Lagerstroemia species. The phylogenetic relationships within Myrtales inferred from the cp genomes of 13 Lagerstroemia species and 27 other Myrtales species were highly supported, which illustrated several novel relationships within Myrtales. Taken together, our results provide comprehensive chloroplast genomic resources, which can be used further for species identification and molecular breeding of Lagerstroemia species.
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Comparative analyses of chloroplast genomes from 22 Lythraceae species: inferences for phylogenetic relationships and genome evolution within Myrtales
BMC plant biology, 2019Co-Authors: Kai Chen, Wang YixiangAbstract:Lythraceae belongs to the order Myrtales, which is part of Archichlamydeae. The family has 31 genera containing approximately 620 species of herbs, shrubs and trees. Of these 31 genera, five large genera each possess 35 or more species. They are Lythrum, with 35; Rotala, with 45; Nesaea, with 50; Lagerstroemia, with 56; and Cuphea, with 275 species. We reported six newly sequenced chloroplast (cp) genomes (Duabanga grandiflora, Trapa natans, Lythrum salicaria, Lawsonia inermis, Woodfordia fruticosa and Rotala rotundifolia) and compared them with 16 other cp genomes of Lythraceae species. The cp genomes of the 22 Lythraceae species ranged in length from 152,049 bp to 160,769 bp. In each Lythraceae species, the cp genome contained 112 genes consisting of 78 protein coding genes, four ribosomal RNAs and 30 transfer RNAs. Furthermore, we detected 211–332 simple sequence repeats (SSRs) in six categories and 7–27 long repeats in four categories. We selected ten divergent hotspots (ndhF, matK, ycf1, rpl22, rpl32, trnK-rps16, trnR-atpA, rpl32-trnL, trnH-psbA and trnG-trnR) among the 22 Lythraceae species to be potential molecular markers. We constructed phylogenetic trees from 42 Myrtales plants with 8 Geraniales plants as out groups. The relationships among the Myrtales species were effectively distinguished by maximum likelihood (ML), maximum parsimony (MP) and Bayesian inference (BI) trees constructed using 66 protein coding genes. Generally, the 22 Lythraceae species gathered into one clade, which was resolved as sister to the three Onagraceae species. Compared with Melastomataceae and Myrtaceae, Lythraceae and Onagraceae differentiated later within Myrtales. The study provided ten potential molecular markers as candidate DNA barcodes and contributed cp genome resources within Myrtales for further study.
Erik Smets - One of the best experts on this subject based on the ideXlab platform.
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Aluminium accumulation in leaves of 127 species in Melastomataceae, with comments on the order Myrtales
Annals of botany, 2002Co-Authors: Steven Jansen, Toshihiro Watanabe, Erik SmetsAbstract:The distribution and systematic significance of aluminium accumulation is surveyed based on semi‐quantitative tests of 166 species, representing all tribes and subfamilies of the Melastomataceae as well as a few members of related families within the Myrtales. The character is strongly present in nearly all members of the Memecylaceae and in most primitive taxa of the Melastomataceae, while non‐accumulating taxa are widespread in the more derived tribes of the Melastomataceae. The variable distribution of Al accumulation in advanced clades of the latter family is probably associated with the tendency to herbaceousness, although it is unclear whether the more herbaceous representatives have developed more specialized Al‐response mechanisms that may exclude high Al levels from the shoot. It is hypothesized that Al accumulation is symplesiomorphic for Melastomataceae and Memecylaceae, and that the feature characterizes the most primitive families in the Myrtales. Indeed, Al accumulation is also characteristic of Crypteroniaceae, Rhynchocalycaceae and Vochysiaceae. Crypteroniaceae and Rhynchocalycaceae probably take a basal position in a sister clade of the Memecylaceae and Melastomataceae, while Al accumulation suggests a basal position for Vochysiaceae in the Myrtaceae clade.
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vestured pits their occurrence and systematic importance in eudicots
Taxon, 2001Co-Authors: Steven Jansen, Pieter Baas, Erik SmetsAbstract:The distribution of vestured pits in secondary xylem reveals interesting patterns that may bear on hypotheses of phylogenetic relationships within eudicots. Vestured pits are found to be relatively widespread at the base of the eurosids I, eurosids II, and euasterids I, but the feature probably has been lost or originated independently in several more derived branches of these clades. Vestured pits characterise orders Myrtales and Gentianales sensu APG; other large monophyletic taxa that consistently show vestured pits include Malpighiaceae, Polygonaceae, Brassicaceae, and most Fabaceae. Representatives from euasterids II always show nonvestured pits. The occurrence of the character implies numerous parallel origins in the following divergent, major taxa: (1) Proteaceae, (2) Polygonaceae (Caryophyllales), (3) eurosids I (Zygophyllaceae, Fabales, very few Rosales, Malpighiales), (4) eurosids II (Myrtales, Malvales, Brassicales), and (5) euasterids I (Gentianales, Lamiales, Solanales). It is demonstrated that vestured pits frequently support results from DNA data.
