Abstract: This invention provides methods for identifying plant cells that exhibit post-transcriptional gene silencing (PTGS) of a chosen gene. The methods involve the use of suppression-sensitive reporter genes that, when introduced into plant cells, are expressed at a lower level in cells that exhibit PTGS than in cells that are not silenced for the particular gene.

Abstract: The present invention provides tomato plants exhibiting a delayed ripening phenotype. The plants of the invention comprise a T-DNA insert comprising a first sequence of from about nucleotide 149 to about nucleotide 1237 of a tomato Acc synthase gene and two inverted repeats of the first sequence. Integration of the T-DNA insert into the plant genome inhibits ethylene biosynthesis in the fruit.

Abstract: A nucleic acid fragment encoding a herbicide-resistant plant acetolactate synthase protein is disclosed. This nucleic acid fragment contains at least one nucleotide mutation resulting in one amino acid change in one of seven substantially conserved regions of acetolactate synthase amino acid homology. This mutation results in the production of an acetolactate synthase protein which is resistant to sulfonylurea herbicide compounds compared to the wild-type protein. Transformation of herbicide sensitive plants or plant cells with the fragment results in resistance to the herbicide.

Abstract: A nucleic acid fragment encoding a herbicide-resistant plant acetolactate synthase protein is disclosed. This nucleic acid fragment contains at least one nucleotide mutation resulting in one amino acid change in one of seven substantially conserved regions of acetolactate synthase amino acid homology. This mutation results in the production of an acetolactate synthase protein which is resistant to sulfonylurea herbicide compounds compared to the wild-type protein. Transformation of herbicide sensitive plants or plant cells with the fragment results in resistance to the herbicide.

Abstract: A nucleic acid fragment encoding a herbicide-resistant plant acetolactate synthase protein is disclosed. This nucleic acid fragment contains at least one nucleotide mutation resulting in one amino acid change in one of seven substantially conserved regions of acetolactate synthase amino acid homology. This mutation results in the production of an acetolactate synthase protein which is resistant to sulfonylurea herbicide compounds compared to the wild-type protin. Transformation of herbicide sensitive plants or plant cells with the fragment results in resistance to the herbicide.

Abstract: A nucleic acid fragment encoding a herbicide-resistant plant acetolactate synthase protein is disclosed. This nucleic acid fragment contains at least one nucleotide mutation resulting in one amino acid change in one of seven substantially conserved regions of acetolactate synthase amino acid homology. This mutation results in the production of an acetolactate synthase protein which is resistant to sulfonylurea herbicide compounds compared to the wild-type protein. Transformation of herbicide sensitive plants or plant cells with the fragment results in resistance to the herbicide.

Abstract: Promoter sequences from the gene from the small subunit of ribulose-1,5-bisphosphate carboxylase are disclosed. Expression cassettes containing a promoter sequence, a linker region, and a 3' fragment are also disclosed. The promotor sequences and expression cassettes are useful for expressing foreign genes to high levels in transformed plants.