IMPACTO DA APLICAÇÃO DE REGULADORES DE CRESCIMENTO E ENRAIZADOR SOBRE A CULTURA DA ALFACE (Lactuca sativa L.)

Abstract

Lettuce (Lactuca sativa) belonging to the Asteraceae family, originated from wild species, currently found in temperate climate regions, in southern Europe and in Western Asia. Lettuce is extremely demanding on nutrients, especially potassium, nitrogen, calcium and phosphorus. It is a slow-growing culture. However, after 30 days the weight gain is accentuated. Thus, this work aimed to carry out a bibliographical research on the effects of rooting on the initial development of seedlings and to study the impacts of growth regulators on the agronomic characteristics of lettuce. Rooters can optimize the root development of a seedling, having as macro and micronutrient composition important for development, whereas plant hormones are organic compounds synthesized in one part of the plant and transferred to another part, which can provoke physiological responses, either by promoting or promoting inhibiting natural plant changes. Responsible for regulating and coordinating metabolism, growth, development and physiological variations in plants. Currently, the groups of hormones and plant regulators that are identified are auxins, gibberellins, cytokinins, ethylene, abscisic acid, brassinosteroids, phenolic compounds and polyamines. However, jasmonates and salicylates are under study for inclusion as two new hormone classes. Through the work of literary revision, the great potential of employment of rooters in the lettuce crop, especially Tryptophan, was evidenced; Nutnut Extract; Cow urine and Molybdenum. The research evidenced the role of rooters in improving the absorption of water and nutrients such as N, expressly increasing the dry matter content and promoting a direct impact on the productivity of this vegetable. For hormones, Cytokinin; the Auxina and the Gibberellins. The main effects of these hormones on lettuce development involve stem and root growth, seed germination, stimulation of cell division and also inhibition of apical bud growth. Thus, we can conclude from the literature review that the use of plant hormones and rooting hormones, as well as the association of both, can improve lettuce quality and generate yield gains.