The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
J R Vedasiromoni - One of the best experts on this subject based on the ideXlab platform.
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antidiarrhoeal activity of hot water extract of black tea camellia sinensis
Phytotherapy Research, 2003Co-Authors: S E Besra, D.k. Ganguly, J R VedasiromoniAbstract:The effect of a hot water extract of black tea (Camellia sinensis (L.) O. Kuntze, Theaceae) on upper gastrointestinal transit and on diarrhoea was investigated employing conventional rodent models of diarrhoea. Black tea extract was found to possess antidiarrhoeal activity in all the models of diarrhoea used. Naloxone (0.5 mg/kg i.p.) significantly inhibited the antidiarrhoeal activity of the extract as well as loperamide, thus indicating a role of the opioid system in the antidiarrhoeal activity of the extract. Copyright © 2003 John Wiley & Sons, Ltd.
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Antidiarrhoeal activity of hot water extract of black tea (Camellia sinensis)
Phytotherapy research : PTR, 2003Co-Authors: S E Besra, D.k. Ganguly, J R VedasiromoniAbstract:The effect of a hot water extract of black tea (Camellia sinensis (L.) O. Kuntze, Theaceae) on upper gastrointestinal transit and on diarrhoea was investigated employing conventional rodent models of diarrhoea. Black tea extract was found to possess antidiarrhoeal activity in all the models of diarrhoea used. Naloxone (0.5 mg/kg i.p.) significantly inhibited the antidiarrhoeal activity of the extract as well as loperamide, thus indicating a role of the opioid system in the antidiarrhoeal activity of the extract.
S E Besra - One of the best experts on this subject based on the ideXlab platform.
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antidiarrhoeal activity of hot water extract of black tea camellia sinensis
Phytotherapy Research, 2003Co-Authors: S E Besra, D.k. Ganguly, J R VedasiromoniAbstract:The effect of a hot water extract of black tea (Camellia sinensis (L.) O. Kuntze, Theaceae) on upper gastrointestinal transit and on diarrhoea was investigated employing conventional rodent models of diarrhoea. Black tea extract was found to possess antidiarrhoeal activity in all the models of diarrhoea used. Naloxone (0.5 mg/kg i.p.) significantly inhibited the antidiarrhoeal activity of the extract as well as loperamide, thus indicating a role of the opioid system in the antidiarrhoeal activity of the extract. Copyright © 2003 John Wiley & Sons, Ltd.
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Antidiarrhoeal activity of hot water extract of black tea (Camellia sinensis)
Phytotherapy research : PTR, 2003Co-Authors: S E Besra, D.k. Ganguly, J R VedasiromoniAbstract:The effect of a hot water extract of black tea (Camellia sinensis (L.) O. Kuntze, Theaceae) on upper gastrointestinal transit and on diarrhoea was investigated employing conventional rodent models of diarrhoea. Black tea extract was found to possess antidiarrhoeal activity in all the models of diarrhoea used. Naloxone (0.5 mg/kg i.p.) significantly inhibited the antidiarrhoeal activity of the extract as well as loperamide, thus indicating a role of the opioid system in the antidiarrhoeal activity of the extract.
Douglas E Soltis - One of the best experts on this subject based on the ideXlab platform.
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transcriptome based phylogeny and whole genome duplication in Theaceae
bioRxiv, 2021Co-Authors: Qun-jie Zhang, Douglas E Soltis, Pamela S Soltis, Shixiong Yang, Ryan A. Folk, L. Gao, Liuqun Zhao, J Zhao, N Zamora, Hai PengAbstract:Abstract Theaceae, with three tribes and nine genera, is a family of great economic and ecological importance. Recent phylogenetic analyses based on plastid genome resolved the relationship among three tribes and the intergeneric relationships within Gordonieae and Stewartieae. However, generic level relationships within the largest tribe Theeae were not fully resolved and potential hybridization among genera within Theeae revealed previously also remains to be tested further. Here we conducted a comprehensive phylogenomic study of Theaceae based on transcriptomes and low-depth whole-genome sequencing of 57 species as well as additional plastome sequence data from previous work. Phylogenetic analyses suggested that Stewartieae was the first-diverging clade in Theaceae, consistent with previous study using plastomic data. Within Theeae, the highly supported Apterosperma-Laplacea clade grouped with Pyrenaria with maximum support based on the partitioned and unpartitioned concatenation analyses using the 610 low-copy nuclear genes, leaving Camellia and Polyspora as another sister genera in the tribe. PhyloNet analyses suggested one reticulation event within Camellia and Pyrenaria respectively, but no intergeneric reticulations were detected in Theeae. Another introgression was found between Gordonia lasianthus and the common ancestor of Gordonieae during the Late Oligocene. The existing land bridges (e.g. Bering land bridge) might have facilitated this ancient introgression. Further researches need to be conducted to uncover the interspecific introgression pattern within Camellia. Ks distribution analyses supported the tea family shared one whole-genome duplication (WGD) event Ad-β, which was recently mapped to the clade containing core Ericales, Primuloids, Polemonioids and Lecythidaceae.
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Transcriptome-based phylogeny and whole-genome duplication in Theaceae
2021Co-Authors: Qun-jie Zhang, Douglas E Soltis, Pamela S Soltis, Zhao L, Zhao J, Ryan A. Folk, Zamora N, Yang S, L. Gao, Hua PengAbstract:Theaceae, with three tribes and nine genera, is a family of great economic and ecological importance. Recent phylogenetic analyses based on plastid genome resolved the relationship among three tribes and the intergeneric relationships within Gordonieae and Stewartieae. However, generic level relationships within the largest tribe Theeae were not fully resolved and potential hybridization among genera within Theeae revealed previously also remains to be tested further. Here we conducted a comprehensive phylogenomic study of Theaceae based on transcriptomes and low-depth whole-genome sequencing of 57 species as well as additional plastome sequence data from previous work. Phylogenetic analyses suggested that Stewartieae was the first-diverging clade in Theaceae, consistent with previous study using plastomic data. Within Theeae, the highly supported Apterosperma-Laplacea clade grouped with Pyrenaria with maximum support based on the partitioned and unpartitioned concatenation analyses using the 610 low-copy nuclear genes, leaving Camellia and Polyspora as another sister genera in the tribe. PhyloNet analyses suggested one reticulation event within Camellia and Pyrenaria respectively, but no intergeneric reticulations were detected in Theeae. Another introgression was found between Gordonia lasianthus and the common ancestor of Gordonieae during the Late Oligocene. The existing land bridges (e.g. Bering land bridge) might have facilitated this ancient introgression. Further researches need to be conducted to uncover the interspecific introgression pattern within Camellia. Ks distribution analyses supported the tea family shared one whole-genome duplication (WGD) event Ad-{beta}, which was recently mapped to the clade containing core Ericales, Primuloids, Polemonioids and Lecythidaceae.
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insights into the historical assembly of east asian subtropical evergreen broadleaved forests revealed by the temporal history of the tea family
New Phytologist, 2017Co-Authors: Xiangqin Yu, Douglas E Soltis, Pamela S Soltis, Junbo Yang, Liang Fang, Shixiong Yang, Dezhu LiAbstract:Summary Subtropical evergreen broadleaved forests (EBLFs) inhabit large areas of East Asia. Although paleovegetation reconstructions have revealed that the subtropical EBLFs existed in Southwest China during the Miocene, the historical construction of these forests remains poorly known. Here, we used the tea family (Theaceae), a characteristic component of the subtropical EBLFs, to gain new insights into the assembly of this important biome. Using a robust phylogenetic framework of Theaceae based on plastome and nuclear ribosomal DNA sequence data, the temporal history of the family was reconstructed. Data from other characteristic components of subtropical EBLFs, including Fagaceae, Lauraceae and Magnoliaceae, were also integrated. Most of the essential elements of the subtropical EBLFs appear to have originated around the Oligocene–Miocene (O–M) boundary. However, small woody lineages (e.g. Camellia, Hartia) from Theaceae were dated to the late Miocene. Accelerated net diversification rates within Theaceae were also detected near the O–M transition period and the late Miocene. Our results suggest that two independent intensifications of the East Asian summer monsoon (EASM) around the O–M boundary and the late Miocene may have facilitated the historical assembly of the subtropical EBLFs in East Asia.
Pamela S Soltis - One of the best experts on this subject based on the ideXlab platform.
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transcriptome based phylogeny and whole genome duplication in Theaceae
bioRxiv, 2021Co-Authors: Qun-jie Zhang, Douglas E Soltis, Pamela S Soltis, Shixiong Yang, Ryan A. Folk, L. Gao, Liuqun Zhao, J Zhao, N Zamora, Hai PengAbstract:Abstract Theaceae, with three tribes and nine genera, is a family of great economic and ecological importance. Recent phylogenetic analyses based on plastid genome resolved the relationship among three tribes and the intergeneric relationships within Gordonieae and Stewartieae. However, generic level relationships within the largest tribe Theeae were not fully resolved and potential hybridization among genera within Theeae revealed previously also remains to be tested further. Here we conducted a comprehensive phylogenomic study of Theaceae based on transcriptomes and low-depth whole-genome sequencing of 57 species as well as additional plastome sequence data from previous work. Phylogenetic analyses suggested that Stewartieae was the first-diverging clade in Theaceae, consistent with previous study using plastomic data. Within Theeae, the highly supported Apterosperma-Laplacea clade grouped with Pyrenaria with maximum support based on the partitioned and unpartitioned concatenation analyses using the 610 low-copy nuclear genes, leaving Camellia and Polyspora as another sister genera in the tribe. PhyloNet analyses suggested one reticulation event within Camellia and Pyrenaria respectively, but no intergeneric reticulations were detected in Theeae. Another introgression was found between Gordonia lasianthus and the common ancestor of Gordonieae during the Late Oligocene. The existing land bridges (e.g. Bering land bridge) might have facilitated this ancient introgression. Further researches need to be conducted to uncover the interspecific introgression pattern within Camellia. Ks distribution analyses supported the tea family shared one whole-genome duplication (WGD) event Ad-β, which was recently mapped to the clade containing core Ericales, Primuloids, Polemonioids and Lecythidaceae.
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Transcriptome-based phylogeny and whole-genome duplication in Theaceae
2021Co-Authors: Qun-jie Zhang, Douglas E Soltis, Pamela S Soltis, Zhao L, Zhao J, Ryan A. Folk, Zamora N, Yang S, L. Gao, Hua PengAbstract:Theaceae, with three tribes and nine genera, is a family of great economic and ecological importance. Recent phylogenetic analyses based on plastid genome resolved the relationship among three tribes and the intergeneric relationships within Gordonieae and Stewartieae. However, generic level relationships within the largest tribe Theeae were not fully resolved and potential hybridization among genera within Theeae revealed previously also remains to be tested further. Here we conducted a comprehensive phylogenomic study of Theaceae based on transcriptomes and low-depth whole-genome sequencing of 57 species as well as additional plastome sequence data from previous work. Phylogenetic analyses suggested that Stewartieae was the first-diverging clade in Theaceae, consistent with previous study using plastomic data. Within Theeae, the highly supported Apterosperma-Laplacea clade grouped with Pyrenaria with maximum support based on the partitioned and unpartitioned concatenation analyses using the 610 low-copy nuclear genes, leaving Camellia and Polyspora as another sister genera in the tribe. PhyloNet analyses suggested one reticulation event within Camellia and Pyrenaria respectively, but no intergeneric reticulations were detected in Theeae. Another introgression was found between Gordonia lasianthus and the common ancestor of Gordonieae during the Late Oligocene. The existing land bridges (e.g. Bering land bridge) might have facilitated this ancient introgression. Further researches need to be conducted to uncover the interspecific introgression pattern within Camellia. Ks distribution analyses supported the tea family shared one whole-genome duplication (WGD) event Ad-{beta}, which was recently mapped to the clade containing core Ericales, Primuloids, Polemonioids and Lecythidaceae.
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insights into the historical assembly of east asian subtropical evergreen broadleaved forests revealed by the temporal history of the tea family
New Phytologist, 2017Co-Authors: Xiangqin Yu, Douglas E Soltis, Pamela S Soltis, Junbo Yang, Liang Fang, Shixiong Yang, Dezhu LiAbstract:Summary Subtropical evergreen broadleaved forests (EBLFs) inhabit large areas of East Asia. Although paleovegetation reconstructions have revealed that the subtropical EBLFs existed in Southwest China during the Miocene, the historical construction of these forests remains poorly known. Here, we used the tea family (Theaceae), a characteristic component of the subtropical EBLFs, to gain new insights into the assembly of this important biome. Using a robust phylogenetic framework of Theaceae based on plastome and nuclear ribosomal DNA sequence data, the temporal history of the family was reconstructed. Data from other characteristic components of subtropical EBLFs, including Fagaceae, Lauraceae and Magnoliaceae, were also integrated. Most of the essential elements of the subtropical EBLFs appear to have originated around the Oligocene–Miocene (O–M) boundary. However, small woody lineages (e.g. Camellia, Hartia) from Theaceae were dated to the late Miocene. Accelerated net diversification rates within Theaceae were also detected near the O–M transition period and the late Miocene. Our results suggest that two independent intensifications of the East Asian summer monsoon (EASM) around the O–M boundary and the late Miocene may have facilitated the historical assembly of the subtropical EBLFs in East Asia.
D.k. Ganguly - One of the best experts on this subject based on the ideXlab platform.
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antidiarrhoeal activity of hot water extract of black tea camellia sinensis
Phytotherapy Research, 2003Co-Authors: S E Besra, D.k. Ganguly, J R VedasiromoniAbstract:The effect of a hot water extract of black tea (Camellia sinensis (L.) O. Kuntze, Theaceae) on upper gastrointestinal transit and on diarrhoea was investigated employing conventional rodent models of diarrhoea. Black tea extract was found to possess antidiarrhoeal activity in all the models of diarrhoea used. Naloxone (0.5 mg/kg i.p.) significantly inhibited the antidiarrhoeal activity of the extract as well as loperamide, thus indicating a role of the opioid system in the antidiarrhoeal activity of the extract. Copyright © 2003 John Wiley & Sons, Ltd.
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Antidiarrhoeal activity of hot water extract of black tea (Camellia sinensis)
Phytotherapy research : PTR, 2003Co-Authors: S E Besra, D.k. Ganguly, J R VedasiromoniAbstract:The effect of a hot water extract of black tea (Camellia sinensis (L.) O. Kuntze, Theaceae) on upper gastrointestinal transit and on diarrhoea was investigated employing conventional rodent models of diarrhoea. Black tea extract was found to possess antidiarrhoeal activity in all the models of diarrhoea used. Naloxone (0.5 mg/kg i.p.) significantly inhibited the antidiarrhoeal activity of the extract as well as loperamide, thus indicating a role of the opioid system in the antidiarrhoeal activity of the extract.
