Pseudomonas In Plants

Pseudomonas is a genus of bacteria that contains 191 known species. It contains a wide range of different types of bacteria, from plant and soil pathogens to plant growth promoters that have wide occurrence in water and plant seeds. The pathogenic species can colonize a wide range of hosts, with some causing major agricultural losses. One of the most common ones is Pseudomonas syringae, which primarily affects woody plants, especially those already damaged by injuries or frost. Some of the known hosts are magnolias, dogwood, fruit-bearing trees like apples, kiwis, and cherries, and some herbaceous plants. These bacteria cause tissue damage and produce toxins, killing cells and using them to multiply. They also produce a protein that allows ice crystals to form, leading to pierced tissue and damaged cells. It is spread worldwide and is an important threat to agroforestry practices.