Studies of genetic diversity in natural populations are important for the definition of conservation strategies, especially in populations reduced by processes of fragmentation and continuous forest extraction. Molecular markers stand out as interesting tools for these studies. The objective of this research was to characterize the diversity and genetic structure of Plathymenia reticulata (Fabaceae), occurring in two fragments of the Montana Semideciduous Forest in the southern of Espírito Santo State, Brazil, using inter-simple sequence repeat (ISSR) molecular markers. DNA samples from 149 individuals were analyzed using 10 ISSR primers, generating 156 fragments, of which 101 were polymorphic (64.74%). The individuals sampled were classified into three units: adult trees (A), a mixture of progenies (B), and young regenerating individuals (C). The number of loci used (N = 101) was greater than that established as optimal number (N = 88), indicating precision in analyses. The genetic diversity index of Nei (H' = 0.407) and the Shannon index (I = 0.594) were found to have high genetic diversity. Besides, through the diversity parameters evaluated, it was possible to confirm that in the areas of natural regeneration and progeny mix there is genetic diversity equivalent to that found in adults. The analysis of molecular variance indicated that most of the genetic variation is found within the groups (96.53%). Genetic differentiation among adult trees was low (Φ = 0.03) indicating that high gene flow rates (N = 12.70) are counteracting the effects of genetic drift. The data obtained allowed to evaluate the potential of adult trees as matrices for seed collection and to obtain seedlings with confirmed genetic variability.

With the occurrence of the COVID-19 pandemic, different areas were affected, with positive or negative effects, as a function of the conditions imposed above all by gardening activities. This brought effects on the production of ornamental plants. In this context, the objective of this study was to analyse the situation of production, commercialization and the impact of the COVID-19 pandemic on the ornamental plants market in the city of Dona Euzébia-MG. A questionnaire with objective and discursive questions was applied to the city producers (30). The production of seedlings in Dona Euzébia is economically and socially important. Most producers have properties with 5 hectares, are in activity for a range of 5 to 19 years and have between 2 to 5 employees. With the onset of the pandemic, the market for seedlings and ornamental plants in Dona Euzébia was positively modified, with an increase in plant sales, which led to changes in production and in the sales process. During the period, producers took all measures to prevent the spread of the virus. The interviews showed that ornamental plants were among the main species cultivated and among the most sought during the pandemic period analyzed in this study. Furthermore, despite the restrictions and the uncertain scenario, there is optimism among producers, especially in terms of post-pandemic sales.

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