摘要:
The present invention provides trans-complementation systems for expressing gene products in plants. In general, the invention provides systems including a carrier vector and a producer vector, both based on plant viruses. The producer vector is defective for at least one function needed for successful systemic infection of a plant, e.g., replication, cell-to-cell movement, or long distance movement. The carrier vector supplies the missing function in trans. Certain producer vectors lack a functional coat protein coding sequence, in which case the corresponding producer vector supplies coat protein in trans. The invention also provides novel plant viral vectors and methods of use, e.g., to produce polypeptides or active RNAs in plants.
摘要:
The present invention provides trans-complementation systems for expressing gene products in plants. In general, the invention provides systems including a carrier vector and a producer vector, both based on plant viruses. The producer vector is defective for at least one function needed for successful systemic infection of a plant, e.g., replication, cell-to-cell movement, or long distance movement. The carrier vector supplies the missing function in trans. Certain producer vectors lack a functional coat protein coding sequence, in which case the corresponding producer vector supplies coat protein in trans. The invention also provides novel plant viral vectors and methods of use, e.g., to produce polypeptides or active RNAs in plants.
摘要:
The invention provides a recombinant apple latent spherical virus (ALSV). The recombinant ALSV contains a partial fragment of a genomic RNA or cDNA from one or more plant pathogenic viruses, and manifests an interference effect against these plant pathogenic viruses. The invention thus provides a novel means of defending against infection of a plant pathogenic virus, without the risk of becoming virulence in the course of proliferation.
摘要:
Disclosed herein are viral vectors suitable for transfection into woody trees for purposes of delivering and expressing beneficial genes with increased stability. Specifically exemplified herein are vectors for transfecting citrus trees. The vectors allow for the expression of useful proteins, such as those that can protect the tree from disease.
摘要:
Disclosed herein are viral vectors suitable for transfection into woody trees for purposes of delivering and expressing beneficial genes. Specifically exemplified herein are vectors for transfecting citrus trees. The vectors allow for the expression of useful proteins, such as those that can protect the tree from disease. Specifically exemplified herein are methods of transfecting woody trees that allow multiple applications of vectors while avoiding superinfection exclusion.
摘要:
The present invention provides trans-complementation systems for expressing gene products in plants. In general, the invention provides systems including a carrier vector and a producer vector, both based on plant viruses. The producer vector is defective for at least one function needed for successful systemic infection of a plant, e.g., replication, cell-to-cell movement, or long distance movement. The carrier vector supplies the missing function in trans. Certain producer vectors lack a functional coat protein coding sequence, in which case the corresponding producer vector supplies coat protein in trans. The invention also provides novel plant viral vectors and methods of use, e.g., to produce polypeptides or active RNAs in plants.
摘要:
The invention provides a fusion protein comprising a plant virus coat protein and a GDF8 peptide domain, or antigenic fragment of the GDF8 peptide domain. Plant virus vectors expressing the fusion protein and methods of using these vectors are also provided.
摘要:
The invention provides novel genetic constructions for the expression of inhibitory RNA in the cytoplasm of eukaryotic cells. The inhibitory RNA may be an anti-sense RNA or a co-suppressor RNA, and functions to reduce the expression of a gene of interest in the target cell. The genetic constructions of the invention are capable of replicating in the cytoplasm of a eukaryotic cell and comprise a promoter region in functional combination with an encoding polynucleotide. The genetic constructions may be designed so as to replicate in the cytoplasm of plant cells, yeast cells, and mammalian cells. When the eukaryotic cell of interest is a plant cell, the genetic construction is preferably derived from a plant RNA virus. Plant RNA virus derived genetic constructions may employ a plant virus subgenomic promoter, including subgenomic promoters from tobamoviruses in functional combination with the RNA encoding region. In a preferred embodiment of the invention, plant cells are induced to produce elevated levels of the carotenoid phytoene. The elevated levels of phytoene are achieved by inhibiting the expression of the enzyme phytoene desaturase using the vectors of the invention.
摘要:
The present invention is directed to recombinant plant viral nucleic acids and to hosts infected thereby. The recombinant plant viral nucleic acids comprise a native plant viral subgenomic promoter, at least one non-native plant viral subgenomic promoter, a plant viral coat protein coding sequence, and optionally, at least one non-native nucleic acid sequence to be transcribed or expressed in the infected host plant. The recombinant plant viral nucleic acids are stable, capable of systemic infection and capable of stable transcription or expression in the plant host of the non-native nucleic acid sequences.
摘要:
Disclosed herein are viral vectors based on modifications of the Citrus Tristeza virus useful for transfecting citrus trees for beneficial purposes. Included in the disclosure are viral vectors including one or more gene cassettes that encode heterologous polypeptides. The gene cassettes are positioned at desirable locations on the viral genome so as to enable expression while preserving functionality of the virus. Also disclosed are methods of transfecting plants and plants transfected with viral vector embodiments.