Fuente: WIPO "tomato" The present invention relates to the use of a particular bacterial species as a biosolution in the production and cultivation of tomatoes. More particularly, the invention relates to the use of a Bacillus siamensis strain, deposited with the National Collection of Cultures of Microorganisms (CNCM) under the accession number CNCM I-5921, in the stimulation of the development and growth of seeds and of tomato plants or the improvement of the yields of tomato crops, and in the improvement of the resistance and tolerance of seeds, tomato plants and tomato crops to abiotic stress.