摘要:
Compositions and methods for the efficient transformation and regeneration of monocot plants are provided. The methods of transformation involve infection with Agrobacterium. In this manner, any gene of interest can be introduced into the monocot plant with high transformation efficiency and in low copy number. Transformed and regenerated monocot cells, tissues, plants, and seed are also provided. The invention encompasses regenerating transformed plants, transgenic seeds produced therefrom, and transgenic plants and transgenic seeds from subsequent generations.
摘要:
The present invention provides assays and methods for efficiently testing a polynucleotide of interest for a phenotype in a root. In some embodiments, the assays and methods include regenerating green tissue that is transgenic for at least one polynucleotide of interest into one or more transgenic plantlets that have at least one transgenic root. Further provided are methods of making a root assay by contacting green tissue with a first rooting medium to produce a plantlet and a plurality of roots. Additionally provided are methods of assaying for insecticidal activity on a live root. Accordingly provided herein is a substantially contamination-free, root bioassay. Further provided are methods of identifying a promoter having activity in a root.
摘要:
The invention provides improved plant transformation methods. In particular the method provides increased transformation frequency, especially in recalcitrant plants. The method includes various transformation protocols for monocots, such as maize and sorghum, using a combination of media and light conditions to achieve increased efficiency of monocot transformation and increased callus initiation frequencies.
摘要:
Improved compositions and methods for transformation and regeneration of plants from embryogenic callus are disclosed that include, for example: use of an intermediate-incubation medium after callus induction to increase the competence of the transformed cells for regeneration; dim light conditions during early phases of selection; use of green callus tissue as a target for microprojectile bombardment; and media with optimized levels of phytohormones and copper concentrations.
摘要:
Methods for producing proteins in plant seeds are disclosed. Expression of the protein is driven by a seed-specific promoter and the protein is preferably expressed as a fusion polypeptide that includes a signal peptide that causes the protein to accumulate in a subcellular compartment to protect the protein.
摘要:
Methods for transforming plants, particularly commercial genotypes of cereals, are provided. The methods involve transformation of meristematic organogenic tissue, and include the use of defined plant growth media. The methods disclosed provide more stable transgenic plants, and permit the transformation of varieties of cereals that are not amenable to transformation by conventional approaches.
摘要:
The present invention provides barley thioredoxin h nucleic acids and proteins. The barley thioredoxin h nucleic acid may be isolated or it may be an expression vector. The expression vector may be operably linked to a transcriptional regulatory sequence. The invention also provides for transgenic plants comprising recombinant barley thioredoxin h. The invention also provides methods of expressing and purifying barley thioredoxin h.
摘要:
The present invention is directed to a transgenic plant wherein at least a part of said plant includes a recombinant nucleic acid with a promoter active in the part operably linked to a nucleic acid encoding a thioredoxin polypeptide wherein the promoter is a seed or grain maturation-specific promoter and the thioredoxin polypeptide includes the amino acid sequence WCGPC. The present invention is further directed to transgenic plants that overexpress thioredoxin in seed wherein the overexpression of thioredoxin h effects a significant increase in the reduction of proteins (—SH as compared to S—S) of the albumin fraction of the seed.