Open Access. Powered by Scholars. Published by Universities.®

Biology Commons

Open Access. Powered by Scholars. Published by Universities.®

Eastern Illinois University

Hybrid poplar

Articles 1 - 6 of 6

Full-Text Articles in Biology

Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn D. Mansfield Jan 2012

Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn D. Mansfield

Thomas Canam

The raffinose family of oligosaccharides (RFOs) serve as transport carbohydrates in the phloem, storage compounds in sink tissues, and putative biological agents to combat both abiotic and biotic stress in several plant species. To investigate further the functional roles of this class of compounds in trees, two cDNAs encoding galactinol synthase (GolS, EC 2.4.1.123), which catalyses the first step in the biosynthesis of RFOs, were identified and cloned from hybrid poplar (Populus alba3grandidentata). Phylogenetic analyses of the Populus GolS isoforms with other known GolS proteins suggested a putative role for these enzymes during biotic or abiotic stress in hybrid poplar. …


Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn Mansfield Jan 2012

Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn Mansfield

Faculty Research & Creative Activity

The raffinose family of oligosaccharides (RFOs) serve as transport carbohydrates in the phloem, storage compounds in sink tissues, and putative biological agents to combat both abiotic and biotic stress in several plant species. To investigate further the functional roles of this class of compounds in trees, two cDNAs encoding galactinol synthase (GolS, EC 2.4.1.123), which catalyses the first step in the biosynthesis of RFOs, were identified and cloned from hybrid poplar (Populus alba3grandidentata). Phylogenetic analyses of the Populus GolS isoforms with other known GolS proteins suggested a putative role for these enzymes during biotic or abiotic stress in hybrid poplar. …


Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn D. Mansfield Jan 2012

Isolation And Characterization Of Galactinol Synthases From Hybrid Poplar, Faride Unda, Thomas Canam, Lindsay Preston, Shawn D. Mansfield

Faculty Research & Creative Activity

The raffinose family of oligosaccharides (RFOs) serve as transport carbohydrates in the phloem, storage compounds in sink tissues, and putative biological agents to combat both abiotic and biotic stress in several plant species. To investigate further the functional roles of this class of compounds in trees, two cDNAs encoding galactinol synthase (GolS, EC 2.4.1.123), which catalyses the first step in the biosynthesis of RFOs, were identified and cloned from hybrid poplar (Populus alba3grandidentata). Phylogenetic analyses of the Populus GolS isoforms with other known GolS proteins suggested a putative role for these enzymes during biotic or abiotic stress in hybrid poplar. …


Over-Expression Of Udp-Glucose Pyrophosphorylase In Hybrid Poplar Affects Carbon Allocation, Heather D. Coleman, Thomas Canam, Kyu-Young Kang, David D. Ellis, Shawn D. Mansfield Jan 2007

Over-Expression Of Udp-Glucose Pyrophosphorylase In Hybrid Poplar Affects Carbon Allocation, Heather D. Coleman, Thomas Canam, Kyu-Young Kang, David D. Ellis, Shawn D. Mansfield

Thomas Canam

The effects of the over-expression of the Acetobacter xylinum UDP-glucose pyrophosphorylase (UGPase) under the control of the tandem repeat Cauliflower Mosaic Virus promoter (2335S) on plant metabolism and growth were investigated in hybrid poplar (Populus alba3grandidentata). Transcript levels, enzyme activity, growth parameters, leaf morphology, structural and soluble carbohydrates, and soluble metabolite levels were quantified in both transgenic and wild-type trees. Transgenic 2335S::UGPase poplar showed impaired growth rates, displaying reduced height growth and stem diameter. Morphologically, 2335S::UGPase trees had elongated axial shoots, and leaves that were substantially smaller in size when compared with wild-type trees at equivalent developmental stages. Biochemical analysis …


Over-Expression Of Udp-Glucose Pyrophosphorylase In Hybrid Poplar Affects Carbon Allocation, Heather Coleman, Thomas Canam, Kyu-Young Kang, David Ellis, Shawn Mansfield Jan 2007

Over-Expression Of Udp-Glucose Pyrophosphorylase In Hybrid Poplar Affects Carbon Allocation, Heather Coleman, Thomas Canam, Kyu-Young Kang, David Ellis, Shawn Mansfield

Faculty Research & Creative Activity

The effects of the over-expression of the Acetobacter xylinum UDP-glucose pyrophosphorylase (UGPase) under the control of the tandem repeat Cauliflower Mosaic Virus promoter (2335S) on plant metabolism and growth were investigated in hybrid poplar (Populus alba3grandidentata). Transcript levels, enzyme activity, growth parameters, leaf morphology, structural and soluble carbohydrates, and soluble metabolite levels were quantified in both transgenic and wild-type trees. Transgenic 2335S::UGPase poplar showed impaired growth rates, displaying reduced height growth and stem diameter. Morphologically, 2335S::UGPase trees had elongated axial shoots, and leaves that were substantially smaller in size when compared with wild-type trees at equivalent developmental stages. Biochemical analysis …


Over-Expression Of Udp-Glucose Pyrophosphorylase In Hybrid Poplar Affects Carbon Allocation, Heather D. Coleman, Thomas Canam, Kyu-Young Kang, David D. Ellis, Shawn D. Mansfield Jan 2007

Over-Expression Of Udp-Glucose Pyrophosphorylase In Hybrid Poplar Affects Carbon Allocation, Heather D. Coleman, Thomas Canam, Kyu-Young Kang, David D. Ellis, Shawn D. Mansfield

Faculty Research & Creative Activity

The effects of the over-expression of the Acetobacter xylinum UDP-glucose pyrophosphorylase (UGPase) under the control of the tandem repeat Cauliflower Mosaic Virus promoter (2335S) on plant metabolism and growth were investigated in hybrid poplar (Populus alba3grandidentata). Transcript levels, enzyme activity, growth parameters, leaf morphology, structural and soluble carbohydrates, and soluble metabolite levels were quantified in both transgenic and wild-type trees. Transgenic 2335S::UGPase poplar showed impaired growth rates, displaying reduced height growth and stem diameter. Morphologically, 2335S::UGPase trees had elongated axial shoots, and leaves that were substantially smaller in size when compared with wild-type trees at equivalent developmental stages. Biochemical analysis …