Efeito protetor do resveratrol sobre o desenvolvimento inicial de plântulas de Lactuca sativa L. expostas ao sulfato de níquel

Abstract

Anthropogenic activities with polluting potential are a problem of great relevance, as they lead to soil contamination by toxic metals in many parts of the world. The accumulation of these toxic metals is a cause for concern in agricultural production, because it is a group of contaminant metals with high persistence capacity in the environment, because they are bioaccumulative and do not decommand not be easily metabolized by plants. Ni is an essential micronutrient for optimal plant growth at low concentrations, but its toxicity is considered more important than its deficiency, due to the deleterious effects being more aggressive. Excessive Ni concentrations influence the morphological, anatomical and biochemical dynamic of plants. Having said that, there is a growing interest focused on the development and use of potentially queling biomolecules as a viable alternative in the process of soil remediation or plant protection. Having said that, the study aimed to evaluate the protective effect of resveratrol (RES) on nickel-induced phytotoxicity in Lactuca sativa L. seedlings grown in microenvironments. The research was developed in a completely randomized design (IHD), with three replications of 30 lettuce seeds. The study was divided into two experiments, the first consisted of different concentrations of RES and the second of the combinations of non-toxic concentrations of RES with toxic levels of NiSO4, plus the control groups: distilled water and isolated concentrations of RES and NiSO4. Germination, morphological and biochemical parameters were analyzed in cultivated seedlings. The results obtained indicate that NiSO4, when applied alone, caused toxicity in lettuce seedlings, but when we analyzed the NiSO4 + RES combinations, we denoted a significant protective effect of RES on the toxicity caused by NiSO4. Thus, the exogenous application of RES can be a great agricultural promise in the physiology of stress caused by toxic metals, because it has chelating action. However, further studies are needed to improve understanding of the exact mechanisms involved in biomolecule actions.