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. 2022 Feb 25:190:113-129.
doi: 10.3897/phytokeys.190.76111. eCollection 2022.

 Nicotianagandarela (Solanaceae), a new species of 'tobacco' highly endangered from the Quadrilátero Ferrífero in Brazil

Mariana Augsten  1 , Pablo Burkowski Meyer  1 , Loreta B Freitas  2 , João A N Batista  1 , João Renato Stehmann  1
Affiliations

 Nicotianagandarela (Solanaceae), a new species of 'tobacco' highly endangered from the Quadrilátero Ferrífero in Brazil

Mariana Augsten et al. PhytoKeys. .

Abstract

Nicotianagandarela Augsten & Stehmann (Solanaceae), sp. nov., a small 'tobacco' known only from one locality at Serra do Gandarela, in the state of Minas Gerais, Brazil, is described and illustrated. It is morphologically characterized by its rosulate basal leaves, red corolla with a short tube not inflated at the apex, and the peculiar habitat, a shaded site under a rocky outcrop ledge along a forested stream. Phylogenetic analyses based on a combined dataset of nuclear (ITS) and plastid (ndhF, trnLF, and trnSG) DNA sequences revealed that the species belongs to the Nicotianasect.Alatae and is sister to the clade with the remaining species in the section. A key for the identification of Brazilian species of the section is given. The unusual habitat, the small population size, and the intense pressure of mining activities in the surroundings made the species assessed as Critically Endangered (CR), needing conservation efforts to avoid its extinction.

Keywords: Endemism; IUCN; Minas Gerais; mining; molecular phylogeny.

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Figures

Figure 1.
Figure 1.
Bayesian 50% majority-rule consensus tree of 56 species of Nicotiana L. of the combined nuclear (ITS) and plastid (ndhF, trnLF, and trnSG) datasets. Numbers next to the nodes represent the posterior probabilities (PP) and bootstrap values. Section names (according to Knapp et al. 2004) are indicated on the right. Width of lines defined by PP values.
Figure 2.
Figure 2.
Nicotianagandarela Augsten & Stehmann A peculiar habitat of the species, the shaded sites in the base of the shaded ledge B seedlings growing in the site C habit highlighting the rosulate leaves and the scapose inflorescence D, E flowers in lateral and frontal view F 2-valvate capsule with many seeds. G seed with sinuous anticlinal walls (Scanning Electron Microscopy) D–G were obtained from plants of the type population (Augsten and Stehmann 1078, BHCB). Photos by JR Stehmann.
Figure 3.
Figure 3.
A main mountains of the Quadrilátero Ferrífero in Minas Gerais. Star indicates the Nicotianagandarela Augsten & Stehmann occurrence site B Google Earth image showing the regional landscape associated with the N.gandarela site, the forest matrix impacted by a small village, and open mining. The red lines indicate mining concessions (Instituto Prístino: Atlas Digital Geoambiental [https://institutopristino.org.br/atlas/]).
See this image and copyright information in PMC

References

    1. Alves R, Kolbek J. (1993) Penumbral rock communities in campo rupestre sites in Brazil. Journal of Vegetation Science 4(3): 357–366. 10.2307/3235594 - DOI
    1. Aoki S, Ito M. (2000) Molecular phylogeny of Nicotiana (Solanaceae) based on the nucleotide sequence of the matK gene. Plant Biology 2(3): 316–324. 10.1055/s-2000-3710 - DOI
    1. Borges RAX, Carneiro MAA, Viana PL. (2011) Altitudinal distribution and species richness of herbaceous plants in campos rupestres of the Southern Espinhaço Range, Minas Gerais, Brazil. Rodriguésia 62(1): 139–152. 10.1590/2175-7860201162110 - DOI
    1. Carmo FF, Kamino LHY, Tobias Junior R, Campos IC, Carmo FF, Silvino G, Castro KJSX, Mauro ML, Rodrigues NUA, Miranda MPS, Pinto CEF. (2017) Fundão tailings dam failures: The environment tragedy of the largest technological disaster of Brazilian mining in global context. Perspectives in Ecology and Conservation 15(3): 145–151. 10.1016/j.pecon.2017.06.002 - DOI
    1. Chase MW, Knapp S, Cox AV, Clarkson JJ, Butsko Y, Joseph J, Savolainen V, Parokonny AS. (2003) Molecular systematics, GISH and the origin of hybrid taxa in Nicotiana (Solanaceae). Annals of Botany 92(1): 107–127. 10.1093/aob/mcg087 - DOI - PMC - PubMed

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