A APLICAÇÃO EXÓGENA DE TRIPTOFANO MELHORA A GEMINAÇÃO E O VIGOR DE PLÂNTULAS DE SOJA (Glycine max L.) MEDIANTE AJUSTE NNO ESTRESSE OXIDATIVO

Abstract

Soybean is considered the main crop worldwide and is used for human and animal consumption, both in natura and through its results. Increase the year of production and the economic value of production to its production employment, mainly, more efficient and monetarily cheaper production. On the other hand, reduction plants in growth, the same reduction plants in total biomass, in addition to a reduction of damage in productivity, mainly in the initial phen stages that are characterized by the establishment of the culture. In the last decades, several alternatives in order to increase the risk of employment, one of them already existing in the job market is the use of amino acids, increasing the germination and productive potential of the cultures, attentive to the antioxidant system, protection of photosynthetic a, increase of germination and germination promotion are some of the already known characteristics of tryptofa (Trp). Portal presents a study aimed at evaluating the effect of tryptophan on germination and the reason for the vigor of soybean plants (Glycine max). The experimental design used was completely randomized, with 5 treatments, being 0, 25, 50, 100 and 200 μM of tryptophan. The seeds were placed to germinate throughout the period in the solutions of the different treatments. After setting up the experiment, 3 predetermined collections were carried out, namely: 1st collection - 14 hours after sowing (HAS), 2nd collection - 5 days after sowing (DAS) and 3rd collection - 8 days after sowing (DAS), which in turn, was separated from shoots and roots. For this purpose, primary metabolism biomolecules, malondialdehyde, hydrogen peroxide, proline and oxidative stress enzymes were evaluated. This work proved that the use of the amino acid tryptophan was responsible for generating oxidative stress in the seeds when placed to germinate at different concentrations, which increased the germination and vigor of soybean seedlings. The concentration of 100 μM of tryptophan was the one that presented the best results for the analyzed variables such as starch, reducing sugars, total soluble sugars and sucrose, at the collection times defined as 5 days after sowing and 8 days after sowing in the shoot. On the other hand, the concentration of 200 μM of tryptophan presented the best results for the variables analyzed, such as germination percentage, germination speed index, malondialdehyde, hydrogen peroxide, catalase, superoxide dismutase and proline 5 days after sowing and 8 days after sowing. sowing in the aerial part and in the root part.