Search results for: Timothy J. Tschaplinski

Items from 1 to 20 out of 46 results

article

Genetic underpinnings of arthropod community distributions in Populus trichocarpa

Sandra J. Simon, Anna Furches, Hari Chhetri, Luke Evans, more

Community genetics seeks to understand the mechanisms by which natural genetic variation in heritable host phenotypes can encompass assemblages of organisms such as bacteria, fungi, and many animals including arthropods. Prior studies that focused on plant genotypes have been unable to identify genes controlling community composition, a necessary step to predict ecosystem structure and function...

article

Ectomycorrhizal symbiosis prepares its host locally and systemically for abiotic cue signaling

Maíra Freitas Pereira, David Cohen, Lucas Auer, Nathalie Aubry, more

The Plant Journal > 116 > 6 > 1784 - 1803

Tree growth and survival are dependent on their ability to perceive signals, integrate them, and trigger timely and fitted molecular and growth responses. While ectomycorrhizal symbiosis is a predominant tree‐microbe interaction in forest ecosystems, little is known about how and to what extent it helps trees cope with environmental changes. We hypothesized that the presence of Laccaria bicolor influences...

article

Expression quantitative trait loci mapping identified PtrXB38 as a key hub gene in adventitious root development in Populus

Tao Yao, Jin Zhang, Timothy B. Yates, Him K. Shrestha, more

New Phytologist > 239 > 6 > 2248 - 2264

Plant establishment requires the formation and development of an extensive root system with architecture modulated by complex genetic networks. Here, we report the identification of the PtrXB38 gene as an expression quantitative trait loci (eQTL) hotspot, mapped using 390 leaf and 444 xylem Populus trichocarpa transcriptomes. Among predicted targets of this trans‐eQTL were genes involved in plant...

article

Arabidopsis C‐terminal binding protein ANGUSTIFOLIA modulates transcriptional co‐regulation of MYB46 and WRKY33

Meng Xie, Jin Zhang, Tao Yao, Anthony C. Bryan, more

New Phytologist > 228 > 5 > 1627 - 1639

The apparent antagonism between salicylic acid (SA) and jasmonic acid (JA)/ethylene (ET) signalling resulting in trade‐offs between defence against (hemi)biotrophic and necrotrophic pathogens has been widely described across multiple plant species. However, the underlying mechanism remains to be fully established. The molecular and cellular functions of ANGUSTIFOLIA (AN) were characterised, and...

article

Horizontal transfer of a pathway for coumarate catabolism unexpectedly inhibits purine nucleotide biosynthesis

Dan M. Close, Connor J. Cooper, Xingyou Wang, Payal Chirania, more

Molecular Microbiology > 112 > 6 > 1784 - 1797

A microbe’s ecological niche and biotechnological utility are determined by its specific set of co‐evolved metabolic pathways. The acquisition of new pathways, through horizontal gene transfer or genetic engineering, can have unpredictable consequences. Here we show that two different pathways for coumarate catabolism failed to function when initially transferred into Escherichia coli. Using laboratory...

article

Multitrait genome‐wide association analysis of Populus trichocarpa identifies key polymorphisms controlling morphological and physiological traits

Hari B. Chhetri, David Macaya‐Sanz, David Kainer, Ajaya K. Biswal, more

New Phytologist > 223 > 1 > 293 - 309

Genome‐wide association studies (GWAS) have great promise for identifying the loci that contribute to adaptive variation, but the complex genetic architecture of many quantitative traits presents a substantial challenge. We measured 14 morphological and physiological traits and identified single nucleotide polymorphism (SNP)‐phenotype associations in a Populus trichocarpa population distributed...

article

Rhizosphere microbiomes diverge among Populus trichocarpa plant-host genotypes and chemotypes, but it depends on soil origin

Allison M. Veach, Reese Morris, Daniel Z. Yip, Zamin K. Yang, more

Microbiome > 2019 > 7 > 1 > 1-15

Background Plants have developed defense strategies for phytopathogen and herbivore protection via coordinated metabolic mechanisms. Low-molecular weight metabolites produced within plant tissues, such as salicylic acid, represent one such mechanism which likely mediates plant – microbe interactions above and below ground. Salicylic acid is a ubiquitous phytohormone at low levels in most plants, yet...

article

Combining loss of function of FOLYLPOLYGLUTAMATE SYNTHETASE1 and CAFFEOYL-COA 3-O-METHYLTRANSFERASE1 for lignin reduction and improved saccharification efficiency in Arabidopsis thaliana

Hongli Xie, Nancy L. Engle, Sivasankari Venketachalam, Chang Geun Yoo, more

Biotechnology for Biofuels > 2019 > 12 > 1 > 1-20

Background Downregulation of genes involved in lignin biosynthesis and related biochemical pathways has been used as a strategy to improve biofuel production. Plant C1 metabolism provides the methyl units used for the methylation reactions carried out by two methyltransferases in the lignin biosynthetic pathway: caffeic acid 3-O-methyltransferase (COMT) and caffeoyl-CoA 3-O-methyltransferase (CCoAOMT)...

article

Correction to: Diel rewiring and positive selection of ancient plant proteins enabled evolution of CAM photosynthesis in Agave

Hengfu Yin, Hao-Bo Guo, David J. Weston, Anne M. Borland, more

BMC Genomics > 2019 > 20 > 1 > 1-1

Following publication of the original article

article

Genome‐wide association studies and expression‐based quantitative trait loci analyses reveal roles of HCT2 in caffeoylquinic acid biosynthesis and its regulation by defense‐responsive transcription factors in Populus

Jin Zhang, Yongil Yang, Kaijie Zheng, Meng Xie, more

New Phytologist > 220 > 2 > 502 - 516

3‐O‐caffeoylquinic acid, also known as chlorogenic acid (CGA), functions as an intermediate in lignin biosynthesis in the phenylpropanoid pathway. It is widely distributed among numerous plant species and acts as an antioxidant in both plants and animals. Using GC‐MS, we discovered consistent and extreme variation in CGA content across a population of 739 4‐yr‐old Populus trichocarpa accessions...

article

A dynamic model of lignin biosynthesis in Brachypodium distachyon

Mojdeh Faraji, Luis L. Fonseca, Luis Escamilla-Treviño, Jaime Barros-Rios, more

Biotechnology for Biofuels > 2018 > 11 > 1 > 1-13

Background Lignin is a crucial molecule for terrestrial plants, as it offers structural support and permits the transport of water over long distances. The hardness of lignin reduces plant digestibility by cattle and sheep; it also makes inedible plant materials recalcitrant toward the enzymatic fermentation of cellulose, which is a potentially valuable substrate for sustainable biofuels. Targeted...

article

Perspectives on the basic and applied aspects of crassulacean acid metabolism (CAM) research

Degao Liu, Kaitlin J. Palla, Rongbin Hu, Robert C. Moseley, more

Plant Science > 2018 > 274 > C > 394-401

Due to public concerns about the decreasing supply of blue water and increasing heat and drought stress on plant growth caused by urbanization, increasing human population and climate change, interest in crassulacean acid metabolism (CAM), a specialized type of photosynthesis enhancing water-use efficiency (WUE) and drought tolerance, has increased markedly. Significant progress has been achieved...

article

Diel rewiring and positive selection of ancient plant proteins enabled evolution of CAM photosynthesis in Agave

Hengfu Yin, Hao-Bo Guo, David J. Weston, Anne M. Borland, more

BMC Genomics > 2018 > 19 > 1 > 1-16

Background Crassulacean acid metabolism (CAM) enhances plant water-use efficiency through an inverse day/night pattern of stomatal closure/opening that facilitates nocturnal CO₂ uptake. CAM has evolved independently in over 35 plant lineages, accounting for ~ 6% of all higher plants. Agave species are highly heat- and drought-tolerant, and have been domesticated as model CAM crops for beverage, fiber,...

article

Modification of plant cell wall chemistry impacts metabolome and microbiome composition in Populus PdKOR1 RNAi plants

Allison M. Veach, Daniel Yip, Nancy L. Engle, Zamin K. Yang, more

Plant and Soil > 2018 > 429 > 1-2 > 349-361

Aims We examined the effect of downregulating PdKOR1 gene, an endo-β-1,4-glucanase gene family member previously characterized to affect cellulose biosynthesis and cell wall composition in Populus, on the secondary metabolome and microbiome of field-grown Populus deltoides. Methods We revealed differences in metabolite profiles of PdKOR1 RNAi and control roots using gas chromatography-mass spectrometry,...

article

Erratum to “Characterization of a novel, ubiquitous fungal endophyte from the rhizosphere and root endosphere of Populus trees” [Fungal Ecol. 27 (Part A) (June 2017) 78–86]

Jessica M. Vélez, Timothy J. Tschaplinski, Rytas Vilgalys, Christopher W. Schadt, more

Fungal Ecology > 2018 > 33 > C > 143

article

Mathematical models of lignin biosynthesis

Mojdeh Faraji, Luis L. Fonseca, Luis Escamilla-Treviño, Jaime Barros-Rios, more

Biotechnology for Biofuels > 2018 > 11 > 1 > 1-17

Background Lignin is a natural polymer that is interwoven with cellulose and hemicellulose within plant cell walls. Due to this molecular arrangement, lignin is a major contributor to the recalcitrance of plant materials with respect to the extraction of sugars and their fermentation into ethanol, butanol, and other potential bioenergy crops. The lignin biosynthetic pathway is similar, but not identical...

article

Clostridium thermocellum LL1210 pH homeostasis mechanisms informed by transcriptomics and metabolomics

Jason M. Whitham, Ji-Won Moon, Miguel Rodriguez, Nancy L. Engle, more

Biotechnology for Biofuels > 2018 > 11 > 1 > 1-13

Background Clostridium (Ruminiclostridium) thermocellum is a model fermentative anaerobic thermophile being studied and engineered for consolidated bioprocessing of lignocellulosic feedstocks into fuels and chemicals. Engineering efforts have resulted in significant improvements in ethanol yields and titers although further advances are required to make the bacterium industry-ready. For instance,...

article

Overexpression of a Domain of Unknown Function 231-containing protein increases O-xylan acetylation and cellulose biosynthesis in Populus

Yongil Yang, Chang Geun Yoo, Kimberly A. Winkeler, Cassandra M. Collins, more

Biotechnology for Biofuels > 2017 > 10 > 1 > 1-16

Background Domain of Unknown Function 231-containing proteins (DUF231) are plant specific and their function is largely unknown. Studies in the model plants Arabidopsis and rice suggested that some DUF231 proteins act in the process of O-acetyl substitution of hemicellulose and esterification of pectin. However, little is known about the function of DUF231 proteins in woody plant species. Results...

article

Correlating laser-induced breakdown spectroscopy with neutron activation analysis to determine the elemental concentration in the ionome of the Populus trichocarpa leaf

Madhavi Z. Martin, David C. Glasgow, Timothy J. Tschaplinski, Gerald A. Tuskan, more

Spectrochimica Acta Part B: Atomic Spectroscopy > 2017 > 138 > C > 46-53

The black cottonwood poplar (Populus trichocarpa) leaf ionome (inorganic trace elements and mineral nutrients) is an important aspect for determining the physiological and developmental processes contributing to biomass production. A number of techniques are used to measure the ionome, yet characterizing the leaf spatial heterogeneity remains a challenge, especially in solid samples. Laser-induced...

article

Agronomic performance of Populus deltoides trees engineered for biofuel production

David Macaya-Sanz, Jin‐Gui Chen, Udaya C. Kalluri, Wellington Muchero, more

Biotechnology for Biofuels > 2017 > 10 > 1 > 1-13

Background One of the major barriers to the development of lignocellulosic feedstocks is the recalcitrance of plant cell walls to deconstruction and saccharification. Recalcitrance can be reduced by targeting genes involved in cell wall biosynthesis, but this can have unintended consequences that compromise the agronomic performance of the trees under field conditions. Here we report the results of...

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INFONA - science communication portal

Search results for: Timothy J. Tschaplinski

Genetic underpinnings of arthropod community distributions in Populus trichocarpa

Ectomycorrhizal symbiosis prepares its host locally and systemically for abiotic cue signaling

Expression quantitative trait loci mapping identified PtrXB38 as a key hub gene in adventitious root development in Populus

Arabidopsis C‐terminal binding protein ANGUSTIFOLIA modulates transcriptional co‐regulation of MYB46 and WRKY33

Horizontal transfer of a pathway for coumarate catabolism unexpectedly inhibits purine nucleotide biosynthesis

Multitrait genome‐wide association analysis of Populus trichocarpa identifies key polymorphisms controlling morphological and physiological traits

Rhizosphere microbiomes diverge among Populus trichocarpa plant-host genotypes and chemotypes, but it depends on soil origin

Combining loss of function of FOLYLPOLYGLUTAMATE SYNTHETASE1 and CAFFEOYL-COA 3-O-METHYLTRANSFERASE1 for lignin reduction and improved saccharification efficiency in Arabidopsis thaliana

Correction to: Diel rewiring and positive selection of ancient plant proteins enabled evolution of CAM photosynthesis in Agave

Genome‐wide association studies and expression‐based quantitative trait loci analyses reveal roles of HCT2 in caffeoylquinic acid biosynthesis and its regulation by defense‐responsive transcription factors in Populus

A dynamic model of lignin biosynthesis in Brachypodium distachyon

Perspectives on the basic and applied aspects of crassulacean acid metabolism (CAM) research

Diel rewiring and positive selection of ancient plant proteins enabled evolution of CAM photosynthesis in Agave

Modification of plant cell wall chemistry impacts metabolome and microbiome composition in Populus PdKOR1 RNAi plants

Erratum to “Characterization of a novel, ubiquitous fungal endophyte from the rhizosphere and root endosphere of Populus trees” [Fungal Ecol. 27 (Part A) (June 2017) 78–86]

Mathematical models of lignin biosynthesis

Clostridium thermocellum LL1210 pH homeostasis mechanisms informed by transcriptomics and metabolomics

Overexpression of a Domain of Unknown Function 231-containing protein increases O-xylan acetylation and cellulose biosynthesis in Populus

Correlating laser-induced breakdown spectroscopy with neutron activation analysis to determine the elemental concentration in the ionome of the Populus trichocarpa leaf

Agronomic performance of Populus deltoides trees engineered for biofuel production

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