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Publications
Powell, W.A., C.A. Maynard, B. Boyle, and A. Seguin. 200_. Fungal and bacterial resistance in transgenic trees. In: M. Fladung, Ed., Transgenic Trees. Springer (in press)
Polin, L. D., H. Liang, R. E. Rothrock, M. Nishii, D. L. Diehl, A. E. Newhouse, C. J. Nairn, W. A. Powell & C. A. Maynard. 2005. Agrobacterium-Mediated Transformation of American Chestnut (Castanea dentata (Marsh.) Borkh.) Somatic Embryos. Plant Cell Tissue and Organ Culture (in press).
- Powell, W.A., S.A. Merkle, H. Liang, and C.A. Maynard. 2005. Blight Resistance Technologies: Transgenic Approaches. In, proc. of conf. on restoration of American chestnut to forest lands, Steiner, K.C. and J.E. Carlson (eds.)
Newhouse, A., F. Schrodt, C. Maynard, and W. Powell. 200_. Agrobacterium transformation of American elm (Ulmus americana) leaf pieces. In: K. Wang, Ed., Agrobacterium Protocols: (2nd edition) Methods in Molecular Biology Book Series, Humana Press, Inc., Totowa, NJ. (in press)
Maynard, C.A., L. D. Polin, S. LaPierre, R. E. Rothrock, and W. A. Powell. 200_. American chestnut (Castanea dentata (Marsh.) Borkh.) transformation. In: K. Wang, Ed., Agrobacterium Protocols: (2nd edition) Methods in Molecular Biology Book Series, Humana Press, Inc., Totowa, NJ. (in press)
Liang, H., H. Gao, C.A. Maynard, and W.A. Powell. 2005. Expression of a self-processing, putative pathogen resistance-enhancing gene construct in Arabidopsis. Biotech. L. 27:435-442
- Connors, B.J., M. Miller, C.A. Maynard, and W.A. Powell. 2002. Cloning and characterization of promoters from American chestnut capable of directing reporter gene expression in transgenic Arabidopsis plants. Plant
Science 163:771-781
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- Connors, B.J., N.P. Laun, C.A. Maynard, and W.A. Powell. 2002. Molecular
characterization of a gene encoding a cystatin expressed in the stems
of American chestnut (Castanea dentata).
Planta 215:510-514
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- Liang, H. C.M. Catranis, C.A. Maynard, and W.A. Powell. 2002. Enhanced
resistance to the poplar pathogen, Septoria musiva, in hybrid poplar
transformed with genes encoding antimicrobial peptides. Biotechnol.
Lett. 24(5):383-389
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- Connors, B.J., C.A. Maynard, and W.A. Powell. 2001. Expression sequence
tags from stem tissue of American chestnut. Biotechnol.
Lett. 23:1407-1411
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- Liang, H., C.A. Maynard, R.D. Allen, W.A. Powell. 2001. Increased
Septoria musiva resistance in transgenic hybrid poplar leaves expressing
a wheat oxalate oxidase gene. Plant
Mol. Biol. 45:619-629
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- Powell, W.A., C.M. Catranis, and C.A. Maynard. 2000. Design of self-processing
antimicrobial peptides plant protection. Letters
in Applied Microbiology 31:163-168
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- Xing, Z.Z., W.A. Powell, and C.A. Maynard. 1999. Development and germination
of somatic embryos in American chestnut. Plant
Cell Tissue and Organ Culture 57:47-55
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- Maynard, C., Z. Xing, S. Bickel, and W. Powell. 1999. Using Genetic
Engineering to Help Save the American Chestnut: A Progress Report. Journal
of the American Chestnut Foundation, 12 (2):41-56.
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- Powell, W.A. and C.A. Maynard. 1997. Designing small antimicrobial
peptides and their encoding genes. pp.165-172. In Micropropagation,
Genetic Engineering, and Molecular Biology of Populus , N.B. Klopfenstein,
Y.W. Chun, M.-S. Kim, M.R. Ahuja, eds. M.C. Dillon, R.C. Carman, L.G.
Eskew, tech. eds. Tech. Rep. RM-GTR-297. Fort Collins, CO: U.S. Department
of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment
Station. 310p.
- Xing, Z., M.F. Satchwell, W.A. Powell, and C.A. Maynard. 1997. Micropropagation
of American chestnut: Increasing rooting rate and preventing shoot-tip
necrosis. In Vitro Cellular and Developmental Biology-Plant 33:43-48
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- Kistler, H.C., U. Benny, and W.A. Powell. 1997. Linear mitochondrial
plasmids of Fusarium oxysporum contain genes with sequence similarity
to a reverse transcriptase from Neurospora spp. Applied and Environmental
Microbiology 63:3311-3313
- Powell, W.A., C.M. Catranis, and C.A. Maynard. 1995. Synthetic Antimicrobial
Peptide Design. Molecular Plant-Microbe Interactions 8:792-794
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- Powell, W.A. 1995. Vegetative incompatibility and mycelial death of
Cryphonectria parasitica monitored with pH indicators. Mycologia 87:738-741
- Powell, W.A. and Z.H. Yan. 1995. Recombination between Fusarium oxysporum
telomeres and pUC ampicillin resistance gene in a transforming vector.
Fungal Genetics Newsletter 42:62-64
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- Rizwana, R. and W.A. Powell. 1995. Ultraviolet light-induced heterokaryon
formation and parasexuality in Cryphonectria parasitica. Experimental
Mycology 19:48-60
- Rizwana, R. and W.A. Powell. 1992. Ultraviolet light-induced instability
of vegetative compatibility groups of Cryphonectria parasitica. Phytopathology
82:1206-1211
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- Milgroom, M.G., S.E. Lipari, and W.A. Powell. 1992. DNA fingerprinting
and analysis of population structure in the chestnut blight fungus,
Cryphonectria parasitica. Genetics 131:297-306
- Powell, W.A. and H.C. Kistler. 1990. In vivo rearrangement of foreign
DNA by Fusarium oxysporum produces linear self-replicating plasmids.
J. Bact. 172:3163-3171
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- Gobbi, E., Y. Wang, R.M. Martin, W.A. Powell, and N.K. Van Alfen.
1990. Mitochondrial DNA of Cryphonectria parasitica: lack of migration
between vegetatively compatible strains. Molecular Plant-Microbe Interactions
3:66-71
- Powell, W.A. and N.K. Van Alfen. 1987. Differential accumulation of
poly(A)+ RNA between virulent and dsRNA-induced hypovirulent strains
of Cryphonectria (Endothia) parasitica. Mol. Cell. Biol. 7:3688-3693
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- Powell, W.A. and N.K. Van Alfen. 1987. Two non-homologous viruses
of Cryphonectria (Endothia)parasitica reduced the accumulation of specific
virulence associated polypeptides. J. Bact. 169:5324-5326
- Hansen, D.R., N.K. Van Alfen, K. Gillis, and W.A. Powell. 1985. Naked
dsRNA associated withhypovirulence of Endothia parasitica is packaged
in fungal vesicles. J. Gen. Virol. 66:2605-2614
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- Merkle, S.A., Andrade, G.M., Nairn, C.J., Powell, W.A. and Maynard, C.A. (2007) Restoration of threatened species: A noble cause for transgenic trees. Tree Genetics & Genomes 3: 111-118
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- Rothrock, R.E., Polin-Mcguigan, L.D., Newhouse, A.E., Powell, W.A. and Maynard, C.A. (2007) Plate flooding as an alternative Agrobacterium-mediated transformation method for American chestnut somatic embryos. Plant Cell, Tissue and Organ Culture 88: 93-99
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- Welch, A.J., A.J. Stipanovic, C.A. Maynard, and W.A. Powell. (2007) The effects of oxalic acid on transgenic Castanea dentata callus tissue expressing oxalate oxidase. Plant Science 172:488-496.
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U.S. Patent
Title: Antimicrobial Peptides
Covers genes encoding antimicrobial peptides designed for
enhancing pathogen resistance in plants.
U.S. Patent No. 5,856,127
Date of Patent: 1/5/99
Abstract: The present invention is directed to antimicrobial
polypeptides and to nucleic acid molecules encoding the antimicrobial
polypeptides. The polypeptide consists of 15 to 20 amino acids and has
an amphipathic alpha helix structure, wherein 3 or more of the amino acids
form a positively charged domain extending axially along the alpha helix.
Expression vectors, host cells, and transgenic plants, as well as methods
of producing plants having improved resistance to fungal and bacterial
infestation, are also proved.
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