EFEITO DE BACTÉRIAS RIZOSFÉRICAS NO DESENVOLVIMENTO DA CENOURA (Daucus carota)

Abstract

Carrot (Daucus carota) is a vegetable of the Apiacea family, belonging to the tuberous roots group, cultivated on a large scale in the Southeast and South regions of Brazil, it is an important vegetable with a high content of vitamin A, in addition to fresh consumption. Use as a raw material by food processing industries, which sell it in the form of select vegetables, children's foods and instant soups. The use of chemical fertilizers, especially nitrogen and phosphate fertilizers, are the biggest increases in production costs and can be harmful to the environment. An alternative to reduce the use of inputs is the use of Growth Promoting Rhizobacteria (RBPC). RBPC can stimulate plant growth in several ways. Therefore, this study aimed to carry out a bibliographical research on the effects of rhizobacteria on carrot development. Rhizobacteria can enhance the root development of a seedling. Thus, the objectives of this work to carry out a literary review on the culture of Carrot (Daucus carota) and the impacts of Growth Promoting Rhizobacteria (RBPC) on the vegetative development of this crop, as well as to verify the potential jobs lost to increase the productivity of this crop. Among the main rhizobacteria with impacts on cultivated species we can mention: Rhizobium leguminosarum, Bacillus sp., Azoarcus and Azospirillum. The ability of the genus Rhizobia to colonize carrot roots is abundant as observed using confocal microscopy. Bacillus sp. is a rhizobacteria of importance for plant growth. These bacteria promote the germination of and also promote better crop development and productivity, thanks to the promotion of plant hormones that solubilize phosphorus, biologically fix nitrogen and block the action of toxic substances from fungi through antibiosis. Azoarcus spp. are nitrogen-fixing proteobacteria of the β subclass that occur in large numbers in the roots of grasses, whereas in carrots their impacts on development and productivity have not yet been considered. In the literature there are several works confirming that Azospirillum produces phytohormones that stimulate the root growth of several plant species, including carrots.