Index Catalog // ScholarsArchive@OSU

Expression and Function of Populus Homologs to TERMINAL FLOWER 1 Genes: Roles in Onset of Flowering and Shoot Phenology

Creator:: Mohamed, Rozi
Abstract:: We isolated and characterized the expression of two genes from Populus trichocarpa that are homologous to the TERMINAL FLOWER 1 (TFL1) gene from the model annual plant Arabidopsis. In Arabidopsis, overexpression of the TFL1 gene extends the vegetative growth phase, and the homozygous mutant tfl1 allele causes early flowering and...
Resource Type:: Dissertation
Full Text:: RNA extractions and real-time RT-PCR, as described in Chapters 2 and 3. Dr. Richard Meilan took

Bacterio-opsin gene overexpression fails to elevate fungal disease resistance in transgenic poplar (Populus)

Creator:: Mohamed, Rozi, Meilan, Richard, Ostry, Michael E., Michler, Charles H., and Strauss, Steven H.
Abstract:: Overexpression of the bacterio-opsin (bO) gene in tobacco had previously been shown to induce hypersensitiveresponse- like lesions, increase viral and bacterial disease resistance, and stimulate pathogenesis-related gene expression. To see if this gene enhanced resistance to fungal pathogens of poplar, we generated a total of 35 transgenic lines in two...
Resource Type:: Article
Full Text:: disease resistance in transgenic poplar (Populus) Rozi Mohamed, Richard Meilan, Michael E. Ostry, Charles

A tapetal ablation transgene induces stable male sterility and slows field growth in Populus

Creator:: Elorriaga, Estefania, Meilan, Richard, Ma, Cathleen, Skinner, Jeffrey S., Etherington, Elizabeth, Brunner, Amy, and Strauss, Steven H.
Abstract:: The field performance of genetic containment technologies–considered important for certain uses of transgenic trees in forestry–is poorly known. We tested the efficiency of a barnase gene driven by the TA29 tapetum-dominant promoter for influencing growth rate and inducing male sterility in a field trial of transgenic hybrid poplar (Populus tremula × Populus...
Resource Type:: Article

Bt-Cry3Aa transgene expression reduces insect damage and improves growth in field-grown hybrid poplar

Creator:: Klocko, Amy L., Meilan, Richard, James, Rosalind R., Viswanath, Venkatesh, Ma, Cathleen, Payne, Peggy, Miller, Lawrence, Skinner, Jeffrey S., Oppert, Brenda, Cardineau, Guy A., and Strauss, Steven H.
Abstract:: The stability and value of transgenic pest resistance for promoting tree growth are poorly understood. These data are essential for determining if such trees could be beneficial to commercial growers in the face of substantial regulatory and marketing costs. We investigated growth and insect resistance in hybrid poplar expressing the...
Resource Type:: Article

Down-regulation of gibberellic acid in poplar has negligible effects on host-plant suitability and insect pest response

Creator:: Buhl, Christine, Strauss, Steven H., and Lindroth, Richard L.
Abstract:: Abstract Endogenous levels and signaling of gibberellin plant hormones such as gibberellic acid (GA) have been genetically down-regulated to create semi-dwarf varieties of poplar. The potential benefits of semi-dwarf stature include reduced risk of wind damage, improved stress tolerance, and improved wood quality. Despite these benefits, modification of growth traits...
Resource Type:: Article
Full Text:: suitability and insect pest 1 response 2 3 Christine Buhl, Steven H. Strauss and Richard L. Lindroth 4

2003 Annual report for the College of Forestry and the Oregon Forest Research Laboratory / Oregon State University

Creator:: Oregon State University. Forest Research Laboratory and Oregon State University. College of Forestry
Resource Type:: Other
Full Text:: . Brunner, Amy M., Steven H. Strauss and Richard Meilan. Development and Validation of Sterility Systems

Maintenance of normal vegetative growth via attenuation of barnase as an agent of floral tissue ablation in Populus

Creator:: Wei, Hao
Abstract:: To reduce the environmental impacts caused by gene flow from transgenic trees, reproductive sterility genes have been developed that use a floral regulatory element linked to a cell toxin. This results in dysfunction or ablation of floral tissues, causing sterility. However, floral promoters often permit low levels of expression in...
Resource Type:: Masters Thesis
Full Text:: sincerely acknowledges Dr. Steve Strauss for his guidance and advice on this study; Dr. Richard Meilan for

Stability of reporter gene expression and RNAi in transgenic poplars over multiple years in the field under vegetative propagation

Creator:: Li, Jingyi
Abstract:: Stable expression of transgenes is required for commercial uses of genetically engineered trees. To better understand the stability of transgene expression under field conditions, we studied transgene expression and RNA interference (RNAi)-induced transgene suppression in 2,480 transgenic poplars (460 transgene insertion events) over three years. Stability of expression was assessed...
Resource Type:: Dissertation
Full Text:: and advice; to Dr. Stephen Difazio for his key role in granting proposal wiring; Dr. Richard Meilan

2002 Annual report for the College of Forestry and the Oregon Forest Research Laboratory / Oregon State University

Creator:: Oregon State University. Forest Research Laboratory and Oregon State University. College of Forestry
Resource Type:: Other
Full Text:: Silvicultural Alternatives Richard Meilan Ph.D., Iowa State University, Ames, 1990 Associate Professor Michael

Identification and Functional Characterization of Genes that Regulate Biomass Production, Floral Development, and Leaf Senescence in Populus Species using Genetic Engineering and Bioinformatics Tools

Creator:: Lu, Haiwei
Abstract:: This dissertation is comprised of four studies on different elements of Populus biotechnology and genomic science: 1) growth improvement by recombinant DNA (rDNA) modification of gibberellin (GA) metabolism; 2) gene editing using zinc-finger nucleases (ZFNs); 3) induction of floral sterility by RNA interference (RNAi) of AGAMOUS (AG) gene homologs; and...
Resource Type:: Dissertation
Full Text:: . Richard Dilworth Graduate Travel Award. Finally, I thank my parents, Xiaoyun Wang and Xuejun Lu, my

ScholarsArchive@OSU

Expression and Function of Populus Homologs to TERMINAL FLOWER 1 Genes: Roles in Onset of Flowering and Shoot Phenology

Bacterio-opsin gene overexpression fails to elevate fungal disease resistance in transgenic poplar (Populus)

A tapetal ablation transgene induces stable male sterility and slows field growth in Populus

Bt-Cry3Aa transgene expression reduces insect damage and improves growth in field-grown hybrid poplar

Down-regulation of gibberellic acid in poplar has negligible effects on host-plant suitability and insect pest response

2003 Annual report for the College of Forestry and the Oregon Forest Research Laboratory / Oregon State University

Maintenance of normal vegetative growth via attenuation of barnase as an agent of floral tissue ablation in Populus

Stability of reporter gene expression and RNAi in transgenic poplars over multiple years in the field under vegetative propagation

2002 Annual report for the College of Forestry and the Oregon Forest Research Laboratory / Oregon State University

Identification and Functional Characterization of Genes that Regulate Biomass Production, Floral Development, and Leaf Senescence in Populus Species using Genetic Engineering and Bioinformatics Tools

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