The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform
Henk 't Hart - One of the best experts on this subject based on the ideXlab platform.
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The unilacunar two‐trace nodal structure of the caudex of Rhodiola rosea L. (Crassulaceae)
Botanical Journal of the Linnean Society, 1994Co-Authors: Henk 't HartAbstract:Abstract The subterranean, Monopodial caudex of Rhodiola rosea has unilacunar, two-trace nodes, whereas its annual leafy flowering shoots have the more common unilacunar, one-trace nodes. The double-traced unilacunar nodal structure of the highly specialized caudex is considered to be the advanced condition in this species as well as in the Crassulaceae in general. The character may be significant in evolutionary and systematics studies of the genus Rhodiola .
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Regular ArticleThe unilacunar two-trace nodal structure of the caudex of Rhodiola rosea L. (Crassulaceae)
Botanical Journal of the Linnean Society, 1994Co-Authors: Henk 't HartAbstract:The subterranean, Monopodial caudex of Rhodiola rosea has unilacunar, two-trace nodes, whereas its annual leafy flowering shoots have the more common unilacunar, one-trace nodes. The double-traced unilacunar nodal structure of the highly specialized caudex is considered to be the advanced condition in this species as well as in the Crassulaceae in general. The character may be significant in evolutionary and systematics studies of the genus Rhodiola .
Zhimin Gao - One of the best experts on this subject based on the ideXlab platform.
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Discovery and Comparative Profiling of microRNAs in Representative Monopodial Bamboo (Phyllostachys edulis) and Sympodial Bamboo (Dendrocalamus latiflorus)
2016Co-Authors: Hansheng Zhao, Lili Wang, Lili Dong, Huayu Sun, Zhimin GaoAbstract:Background: According to the growth pattern of bamboo, sympodial bamboo and Monopodial bamboo are considered as two mainly kinds of bamboo. They have different phenotypes and different characteristics in developmental stage. Much attention had been paid on the study of bamboo cultivation, processing, physiology, biochemistry and molecular biology, which had made great progresses in the last decade, especially for the highlighted achievement of the bamboo genomics. However, there is no information available on concerning comparative profiling of miRNAs between sympodial bamboo and Monopodial bamboo, which might play important roles in the regulation of bamboo development. Methodology/Principal Findings: We identified the profiles of small RNAs using leaf tissues from one sympodial bamboo i.e. moso bamboo (Phyllostachys edulis) and another Monopodial bamboo i.e. ma bamboo (Dendrocalamus latiflorus). The result showed that there were 19,295,759 and 11,513,888 raw sequence reads, in which 92 and 69 conserved miRNAs, as well as 95 and 62 novel miRNAs were identified in moso bamboo and ma bamboo, respectively. The ratio of high conserved miRNA families in ma bamboo is more than that in moso bamboo. In addition, a total of 49 and 106 potential targets were predicted in moso bamboo and ma bamboo, respectively, in which several targets for novel miRNAs are transcription factors that play important roles in plant development. More importantly, annotation of differentially expressed target genes was performed based on the analysis of pathway and gene ontology terms enrichment
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Discovery and comparative profiling of microRNAs in representative Monopodial bamboo (Phyllostachys edulis) and sympodial bamboo (Dendrocalamus latiflorus)
PloS one, 2014Co-Authors: Hansheng Zhao, Lili Wang, Lili Dong, Huayu Sun, Zhimin GaoAbstract:Background According to the growth pattern of bamboo, sympodial bamboo and Monopodial bamboo are considered as two mainly kinds of bamboo. They have different phenotypes and different characteristics in developmental stage. Much attention had been paid on the study of bamboo cultivation, processing, physiology, biochemistry and molecular biology, which had made great progresses in the last decade, especially for the highlighted achievement of the bamboo genomics. However, there is no information available on concerning comparative profiling of miRNAs between sympodial bamboo and Monopodial bamboo, which might play important roles in the regulation of bamboo development. Methodology/Principal Findings We identified the profiles of small RNAs using leaf tissues from one sympodial bamboo i.e. moso bamboo (Phyllostachys edulis) and another Monopodial bamboo i.e. ma bamboo (Dendrocalamus latiflorus). The result showed that there were 19,295,759 and 11,513,888 raw sequence reads, in which 92 and 69 conserved miRNAs, as well as 95 and 62 novel miRNAs were identified in moso bamboo and ma bamboo, respectively. The ratio of high conserved miRNA families in ma bamboo is more than that in moso bamboo. In addition, a total of 49 and 106 potential targets were predicted in moso bamboo and ma bamboo, respectively, in which several targets for novel miRNAs are transcription factors that play important roles in plant development. More importantly, annotation of differentially expressed target genes was performed based on the analysis of pathway and gene ontology terms enrichment. Conclusions/Significance This study provides the first large-scale sight of discovery and comparative characterization of miRNAomes between two representative bamboos belonged to sympodial bamboo and Monopodial bamboo, respectively. Although it will be necessary to validate the function of miRNAs through more experimental research in further, these results lay a foundation for unraveling the miRNA-mediated molecular processes in different kinds of bamboo.
Hansheng Zhao - One of the best experts on this subject based on the ideXlab platform.
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Discovery and Comparative Profiling of microRNAs in Representative Monopodial Bamboo (Phyllostachys edulis) and Sympodial Bamboo (Dendrocalamus latiflorus)
2016Co-Authors: Hansheng Zhao, Lili Wang, Lili Dong, Huayu Sun, Zhimin GaoAbstract:Background: According to the growth pattern of bamboo, sympodial bamboo and Monopodial bamboo are considered as two mainly kinds of bamboo. They have different phenotypes and different characteristics in developmental stage. Much attention had been paid on the study of bamboo cultivation, processing, physiology, biochemistry and molecular biology, which had made great progresses in the last decade, especially for the highlighted achievement of the bamboo genomics. However, there is no information available on concerning comparative profiling of miRNAs between sympodial bamboo and Monopodial bamboo, which might play important roles in the regulation of bamboo development. Methodology/Principal Findings: We identified the profiles of small RNAs using leaf tissues from one sympodial bamboo i.e. moso bamboo (Phyllostachys edulis) and another Monopodial bamboo i.e. ma bamboo (Dendrocalamus latiflorus). The result showed that there were 19,295,759 and 11,513,888 raw sequence reads, in which 92 and 69 conserved miRNAs, as well as 95 and 62 novel miRNAs were identified in moso bamboo and ma bamboo, respectively. The ratio of high conserved miRNA families in ma bamboo is more than that in moso bamboo. In addition, a total of 49 and 106 potential targets were predicted in moso bamboo and ma bamboo, respectively, in which several targets for novel miRNAs are transcription factors that play important roles in plant development. More importantly, annotation of differentially expressed target genes was performed based on the analysis of pathway and gene ontology terms enrichment
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Discovery and comparative profiling of microRNAs in representative Monopodial bamboo (Phyllostachys edulis) and sympodial bamboo (Dendrocalamus latiflorus)
PloS one, 2014Co-Authors: Hansheng Zhao, Lili Wang, Lili Dong, Huayu Sun, Zhimin GaoAbstract:Background According to the growth pattern of bamboo, sympodial bamboo and Monopodial bamboo are considered as two mainly kinds of bamboo. They have different phenotypes and different characteristics in developmental stage. Much attention had been paid on the study of bamboo cultivation, processing, physiology, biochemistry and molecular biology, which had made great progresses in the last decade, especially for the highlighted achievement of the bamboo genomics. However, there is no information available on concerning comparative profiling of miRNAs between sympodial bamboo and Monopodial bamboo, which might play important roles in the regulation of bamboo development. Methodology/Principal Findings We identified the profiles of small RNAs using leaf tissues from one sympodial bamboo i.e. moso bamboo (Phyllostachys edulis) and another Monopodial bamboo i.e. ma bamboo (Dendrocalamus latiflorus). The result showed that there were 19,295,759 and 11,513,888 raw sequence reads, in which 92 and 69 conserved miRNAs, as well as 95 and 62 novel miRNAs were identified in moso bamboo and ma bamboo, respectively. The ratio of high conserved miRNA families in ma bamboo is more than that in moso bamboo. In addition, a total of 49 and 106 potential targets were predicted in moso bamboo and ma bamboo, respectively, in which several targets for novel miRNAs are transcription factors that play important roles in plant development. More importantly, annotation of differentially expressed target genes was performed based on the analysis of pathway and gene ontology terms enrichment. Conclusions/Significance This study provides the first large-scale sight of discovery and comparative characterization of miRNAomes between two representative bamboos belonged to sympodial bamboo and Monopodial bamboo, respectively. Although it will be necessary to validate the function of miRNAs through more experimental research in further, these results lay a foundation for unraveling the miRNA-mediated molecular processes in different kinds of bamboo.
De-he Xing - One of the best experts on this subject based on the ideXlab platform.
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A new Neocalamites (Sphenophyta) with prickles and attached cones from the Upper Triassic of China
Palaeoworld, 2012Co-Authors: Shuqin Zan, Brian J. Axsmith, Ignacio H. Escapa, Nicholas C. Fraser, Feng-xiang Liu, De-he XingAbstract:Remains of the extinct sphenophyte (horsetail) Neocalamites are most widespread in the Middle–Upper Triassic and are typically represented by stem and leaf fragments. Here we report on spectacular new finds of Neocalamites from the Late Triassic Yangcaogou Formation in Liaoning Province, China that include bedding surfaces dominated by nearly complete aerial stems with attached leaf whorls and rare bractless cones. They reveal a Monopodial growth habit for the stems, which are covered with downward projecting prickles that probably provided protection against herbivores. These features provide the basis for a new proposed species, Neocalamites horridus. The nodes bear whorls of very long leaves mainly free to their bases, and one specimen bears an attached cone on a long peduncle. Identical dispersed cones have also been recovered. The leaves of adjacent Monopodial stems most likely interlocked to support growth in large stands akin to the role now played by branches in large modern Equisetum species. The new Chinese Neocalamites is among the most confidently reconstructed species, and indicates a greater diversity of sphenophyte morphology during the Mesozoic than previously realized.
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Research paper A new Neocalamites (Sphenophyta) with prickles and attached cones from the Upper Triassic of China
2012Co-Authors: Zan Shuqin, Brian J. Axsmith, Ignacio H. Escapa, Nicholas C. Fraser, Feng-xiang Liu, De-he XingAbstract:Remains of the extinct sphenophyte (horsetail) Neocalamites are most widespread in the Middle‐Upper Triassic and are typically represented by stem and leaf fragments. Here we report on spectacular new finds of Neocalamites from the Late Triassic Yangcaogou Formation in Liaoning Province, China that include bedding surfaces dominated by nearly complete aerial stems with attached leaf whorls and rare bractless cones. They reveal a Monopodial growth habit for the stems, which are covered with downward projecting prickles that probably provided protection against herbivores. These features provide the basis for a new proposed species, Neocalamites horridus. The nodes bear whorls of very long leaves mainly free to their bases, and one specimen bears an attached cone on a long peduncle. Identical dispersed cones have also been recovered. The leaves of adjacent Monopodial stems most likely interlocked to support growth in large stands akin to the role now played by branches in large modern Equisetum species. The new Chinese Neocalamites is among the most confidently reconstructed species, and indicates a greater diversity of sphenophyte morphology during the Mesozoic than previously realized. © 2012 Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
Jeremy J. Bruhl - One of the best experts on this subject based on the ideXlab platform.
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Sympodial structure of spikelets in the tribe Schoeneae (Cyperaceae)
American Journal of Botany, 2004Co-Authors: Xiufu Zhang, Karen L. Wilson, Jeremy J. BruhlAbstract:Spikelet morphology of 250 specimens of 47 species of Schoeneae was examined using light microscopy and scanning electron microscopy. We confirmed that spikelet structure in Schoeneae is cymose with a sympodial ‘‘rachilla.’’ Monopodial spikelets, as described by most current literature, were not found in Schoeneae. Prophylls are not always present in sympodial spikelets and cannot be used to determine whether a spikelet is sympodial or Monopodial. Spikelets of Schoeneae develop acropetally, and the uppermost glume may or may not produce a flower. The last feature may be variable within species and within individual plants, so presence or absence of this flower is not an indication of sympodial or Monopodial spikelet structure in Schoeneae. Relative position of flower, glume, and axis is a reliable criterion to judge whether spikelets are sympodial or Monopodial. In some species of Schoenus and in Ptilothrix, formation of the arch-shaped base of the fertile glume relates to the shape of the inclined nodes on which the glume grows. This study highlights the need to reinvestigate spikelet structure in other tribes of Cyperaceae.