The Experts below are selected from a list of 193818 Experts worldwide ranked by ideXlab platform
A. Mohankumar - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial Potential of Plant Seed Extracts against Multidrug Resistant Methicillin Resistant Staphylococcus aureus (MDR-MRSA)
2015Co-Authors: E. S. Karthy, P. Ranjitha, A. MohankumarAbstract:Based on ethnopharmacological information, four different varieties of Seeds were obtained from authentic Seed suppliers. Ethanol, methanol, acetone, chloroform and petroleum ether Seed extracts were assessed for antibacterial activity against wound isolates of Multi Drug Resistant- Methicillin Resistant Staphylococcus aureus (MDR-MRSA). Ethanol, methanol and acetone extracts of Moringa oleifera, Elettaria cardamomum and Tamarindus indica Seeds showed more effective anti MRSA activity than Artocarpus heterophyllus. In addition Moringa oleifera Seed extracts may have the potential to restore the effectiveness of ȕ-lactam antibiotics against MRSA
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antimicrobial potential of Plant Seed extracts against multidrug resistant methicillin resistant staphylococcus aureus mdr mrsa
International Journal of Biology, 2009Co-Authors: E. S. Karthy, P. Ranjitha, A. MohankumarAbstract:Based on ethnopharmacological information, four different varieties of Seeds were obtained from authentic Seed suppliers. Ethanol, methanol, acetone, chloroform and petroleum ether Seed extracts were assessed for antibacterial activity against wound isolates of Multi Drug Resistant - Methicillin Resistant Staphylococcus aureus (MDR-MRSA). Ethanol, methanol and acetone extracts of Moringa oleifera, Elettaria cardamomum and Tamarindus indica Seeds showed more effective anti MRSA activity than Artocarpus heterophyllus. In addition Moringa oleifera Seed extracts may have the potential to restore the effectiveness of $\beta$-lactam antibiotics against MRSA.
E. S. Karthy - One of the best experts on this subject based on the ideXlab platform.
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Antimicrobial Potential of Plant Seed Extracts against Multidrug Resistant Methicillin Resistant Staphylococcus aureus (MDR-MRSA)
2015Co-Authors: E. S. Karthy, P. Ranjitha, A. MohankumarAbstract:Based on ethnopharmacological information, four different varieties of Seeds were obtained from authentic Seed suppliers. Ethanol, methanol, acetone, chloroform and petroleum ether Seed extracts were assessed for antibacterial activity against wound isolates of Multi Drug Resistant- Methicillin Resistant Staphylococcus aureus (MDR-MRSA). Ethanol, methanol and acetone extracts of Moringa oleifera, Elettaria cardamomum and Tamarindus indica Seeds showed more effective anti MRSA activity than Artocarpus heterophyllus. In addition Moringa oleifera Seed extracts may have the potential to restore the effectiveness of ȕ-lactam antibiotics against MRSA
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antimicrobial potential of Plant Seed extracts against multidrug resistant methicillin resistant staphylococcus aureus mdr mrsa
International Journal of Biology, 2009Co-Authors: E. S. Karthy, P. Ranjitha, A. MohankumarAbstract:Based on ethnopharmacological information, four different varieties of Seeds were obtained from authentic Seed suppliers. Ethanol, methanol, acetone, chloroform and petroleum ether Seed extracts were assessed for antibacterial activity against wound isolates of Multi Drug Resistant - Methicillin Resistant Staphylococcus aureus (MDR-MRSA). Ethanol, methanol and acetone extracts of Moringa oleifera, Elettaria cardamomum and Tamarindus indica Seeds showed more effective anti MRSA activity than Artocarpus heterophyllus. In addition Moringa oleifera Seed extracts may have the potential to restore the effectiveness of $\beta$-lactam antibiotics against MRSA.
L. Despres - One of the best experts on this subject based on the ideXlab platform.
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Sex and pollen: the role of males in stabilising a Plant-Seed eater pollinating mutualism
Oecologia, 2003Co-Authors: L. DespresAbstract:Some Plants are exclusively pollinated by an insect whose larvae feed on their Seeds. The net outcome of a single visit for the Plant depends on the number of ovules fertilised by the visitor, the number of eggs laid, and the number of Seeds eaten by each larva. Unlike other known Plant-Seed eater pollinating mutualisms, the globeflower-globeflower fly mutualism (Trollius europaeus-Chiastocheta spp.) is unique in that not only females but also males visit flowers, and both sexes are potential pollinators. I analysed the relative efficiency of Chiastocheta males versus females in transporting pollen and fertilising globeflower ovules. I show that there is no sex-specific morphological adaptation or behaviour to enhance pollen collection and transportation in Chiastocheta flies, and that males contribute to pollination. However, because of their smaller body size, males transport significantly less pollen than females. Less Seeds are produced after a visit from a male than after a visit from a female. A single female visit contributes to about 12% of total Seed production, and a single male visit to only 5.4%. Females tend to spend more time inside the flower than males, and the number of ovules fertilised is significantly correlated with the time insects spent inside the closed corolla. The lower efficiency of ovule fertilisation by a male's single visit is compensated for by the higher rate of flower visitation by males: a flower receives about twice as many visits from males as from females during a time unit. The contribution of males to pollination is of major importance with respect to understanding the evolutionary stability of the globeflower-globeflower fly mutualism, as males satiate pollen requirement of flowers, masking the antagonistic effect of ovipositing females.
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Variation in predation costs with Chiastocheta egg number on Trollius europaeus: how many Seeds to pay for pollination?
Ecological Entomology, 2001Co-Authors: N. Jaeger, F. Pompanon, L. DespresAbstract:1. In obligate Plant/Seed parasite-pollinator mutualisms, the Plant is exclusively pollinated by an insect whose larvae are specific Seed predators. Hence, outcomes of the interaction for the Plant can vary with the number of eggs laid and the number of Seeds eaten per larva. 2. In the work reported here, predation by Chiastocheta larvae on Seeds of Trollius europaeus was analysed as a function of the number of eggs laid on the flower. Flowers with an increasing number of eggs were bagged in three populations and Seeds were counted after the end of larval predation, in order to assess whether there was competition among larvae. 3. Seed predation on single-egg flowers was high and variable (mean per population ranging from 15 to 40% of the developed Seeds). Seed predation increased weakly with increasing egg load and was lower than gross Seed production (always
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Evolutionary conflict between Trollius europaeus and its Seed-parasite pollinators Chiastocheta flies
Evolutionary Ecology Research, 2000Co-Authors: N. Jaeger, I. Till-bottraud, L. DespresAbstract:Mutualisms are characterized by balanced reciprocal exploitation. This creates an evolutionary conflict in that selection will favour individuals that increase their fitness at the cost of the mutualist partner. To counter this evolutionary instability, each partner must be able to prevent over-exploitation by the other. In Plant/Seed-parasite pollinator mutualisms like that involving the globeflower Trollius europaeus and the globeflower fly (Chiastocheta spp.), ovipositing females can have a more or less mutualistic/antagonistic effect on Plant Seed output, depending on the amount of pollination achieved during oviposition, the number of eggs laid and Seed predation per larva. We found that flowers with no Chiastocheta egg had a high Seed set and there was no significant increase in Seed set before predation with increasing egg load, suggesting that most pollination is achieved by non-ovipositing visitors (males and/or non-ovipositing females). Hence, additional eggs do not lead to higher pollination, oviposition is a non-mutualistic behaviour and, therefore, there is a conflict between T. europaeus and Chiastocheta flies for the number of eggs laid. Egg load increases throughout flower lifespan. No mechanism seems to have evolved to regulate the number of eggs laid on T. europaeus. For example, controlled pollination experiments showed that T europaeus cannot limit Chiastocheta oviposition by triggering flower senescence as soon as full pollination has been achieved. In this context, the high average number of eggs per flower observed in alpine populations is not surprising. Finally, the decrease in net Seed production with increasing egg load was weak. We discuss the other factors involved in the regulation of the conflict between T europaeus and Chiastocheta flies.
Thomas Lubberstedt - One of the best experts on this subject based on the ideXlab platform.
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genetic characterisation of Seed yield and fertility traits in perennial ryegrass lolium perenne l
Theoretical and Applied Genetics, 2008Co-Authors: Bruno Studer, Louise Bach Jensen, Stephan Hentrup, Gintaras Brazauskas, Roland Kolliker, Thomas LubberstedtAbstract:Seed yield is a trait of major interest for the key grassland species Lolium perenne L. An F2 mapping population of perennial ryegrass (VrnA), recently characterised for vernalisation response, was assessed in a glasshouse for traits related to Seed yield based on a lattice design with four replications over 2 years. The traits heading date, Plant height, length of panicles, number of panicles per Plant, Seed yield per panicle, flag leaf length, flag leaf width and Seed yield per Plant revealed repeatabilities ranging from 41 to 76% and a considerable amount of genetic variation in the VrnA population. Path analysis partitioned the direct and indirect effects of Seed yield components on Seed yield per Plant. Seed yield per panicle showed the highest effect on total Seed yield. The adjusted mean values of each trait and a genetic linkage map consisting of 97 anonymous and 85 gene associated DNA markers were used for quantitative trait loci (QTL) analysis. Of particular interest were two QTL on linkage group (LG) 1 and LG 2, explaining 41 and 18%, respectively, of the observed phenotypic variation for the trait Seed yield per panicle. Both QTL co-located with two major QTL for total Seed yield per Plant possibly representing the S and Z loci of the gametophytic self incompatibility (SI) system of perennial ryegrass. The diversity of SI alleles in mapping parents and the degree of heterozygosity at SI loci in the full sib progeny determines the interference of self incompatibility with Seed production.
Jeanluc Gaillard - One of the best experts on this subject based on the ideXlab platform.
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milk clotting activity of enzyme extracts from sunflower and albizia Seeds and specific hydrolysis of bovine κ casein
International Dairy Journal, 2007Co-Authors: Antonio Silvio Do Egito, L E Laguna, Chantal Poirson, Laurent Miclo, Gerard Humbert, Jean-michel Girardet, Daniel Mollé, Jeanluc GaillardAbstract:Milk-clotting activity found in ammonium sulfate-precipitated protein extracts from Albizia lebbeck and Helianthus annuus Seeds was studied. Specific clotting activity of albizia Seed extract was 15 times higher than that of sunflower Seed extract. Zymogram analysis revealed several proteolytic bands in albizia Seed extract and one diffuse proteolytic band for sunflower Seed extract. Whole bovine casein was incubated with the Plant Seed extracts or chymosin and some breakdown products were characterized by reversed-phase high-performance liquid chromatography and electrophoresis. Similar to chymosin, the two Seed extracts exhibited proteolytic activity toward κ-casein, αs-casein and β-casein, with the highest activity observed for the albizia Seed extract. Mass spectrometry analysis showed that the sunflower extract hydrolyzed κ-casein at the Phe105–Met106 bond, as does chymosin. The albizia extract also displayed activity on κ-casein, but the Lys116–Thr117 bond was its preferred target.
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Milk-clotting activity of enzyme extracts from sunflower and albizia Seeds and specific hydrolysis of bovine kappa -casein.
International Dairy Journal, 2007Co-Authors: Antonio Silvio Do Egito, L E Laguna, Chantal Poirson, Laurent Miclo, Gerard Humbert, Jean-michel Girardet, Daniel Mollé, Jeanluc GaillardAbstract:Milk-clotting activity found in ammonium sulfate-precipitated protein extracts from Albizia lebbeck and Helianthus annuus Seeds was studied. Specific clotting activity of albizia Seed extract was 15 times higher than that of sunflower Seed extract. Zymogram analysis revealed several proteolytic bands in albizia Seed extract and one diffuse proteolytic band for sunflower Seed extract. Whole bovine casein was incubated with the Plant Seed extracts or chymosin and some breakdown products were characterized by reversed-phase high-performance liquid chromatography and electrophoresis. Similar to chymosin, the two Seed extracts exhibited proteolytic activity toward κ-casein, αs-casein and β-casein, with the highest activity observed for the albizia Seed extract. Mass spectrometry analysis showed that the sunflower extract hydrolyzed κ-casein at the Phe105–Met106 bond, as does chymosin. The albizia extract also displayed activity on κ-casein, but the Lys116–Thr117 bond was its preferred target.
