"Pseudomonas helianthi" is a Gram-negative plant pathogenic bacterium that infects a variety of plants. It was once considered a pathovar of Pseudomonas syringae, but following DNA-relatedness studies, it was recognized as a separate species and P. syringae pv.
The bacterium "Pseudomonas helianthi" is a Gram-negative plant-borne pathogen that affects multiple types of plants. It was previously regarded as part of the larger Pseudomonas syringae group, but subsequent research revealed it to be a distinct species and subgroup within this category.