Morphology, anatomy and leaf ultrastructure of Froelichia tomentosa (Mart.) Moq. (Amaranthaceae) - a critically endangered species in Brazil

Authors

DOI:

https://doi.org/10.5902/2179460X40503

Keywords:

Amaranthaceae, Anatomy Kranz, Sandy-fields, Chloroplasts, Threatened species, Adaptive strategies

Abstract

In Brazil, Froelichia tomentosa (Mart.) Moq. has records of occurrence in Rio Grande do Sul (RS) and Bahia, however, in the former there are indications that its populations are extinct. In the RS, the records are restricted to the region of sandy- fields. In this region, biodiversity has been threatened by advances in agriculture and forestry that intensified in the sandy patch process. Therefore, this work aimed to describe the morphoanatomy and ultrastructure of the leaf blade in Froelichia tomentosa, seeking to correlate leaf characteristics to the environmental conditions. Individuals from different populations in the sand- fields (Pampa biome) were sampled. Leaf blade analyzes were performed by scanning electron microscopy (SEM), transmission electron microscopy (MET) and optical microscopy (MO). The following anatomical features were verified: epidermis with trichomes and stomata in the adaxial and abaxial surface, compact mesophyll, aquiferous hypodermis, Kranz anatomy, and numerous plastoglobules and peroxisomes. The presence of these characters may be related to the adaptation of this species to environment. In addition, we highlight the necessity to create conservation units in the sand-fields region, in order to preserve species as well as that of the present study.

Author Biographies

Aline Viana, Universidade Estadual do Oeste do Paraná, Cascavel, PR

Pós Graduação em Biotecnologia, Bloco 8, sala 305.

Elisete Maria de Freitas, Universidade do Vale do Taquari, Lajeado, RS

Bióloga, Doutora em Botânica (2010), na área de Ecologia Vegetal, pela Universidade Federal do Rio Grande do Sul (UFRGS), mestre em Geografia (2006), na área de Análise Ambiental pela UFRGS. Tem especialização em Planejamento e Gestão Ambiental pelo Centro Universitário UNIVATES e em Cultura de Tecidos Vegetais pela Universidade Federal de Lavras (UFLA).

Shirley Martins Silva, Universidade Estadual do Oeste do Paraná, Cascavel, PR

Bacharel em Ciências Biológicas pela Universidade Federal de Pernambuco (UFPE), Mestre em Biologia Vegetal pelo Programa de Pós-Graduação em Biologia Vegetal da UFPE e Doutora em Ciências Biológicas (Biologia Vegetal) pelo Programa de Pós-Graduação em Biociências na Universidade Estadual Paulista (UNESP, Rio Claro). Docente e pesquisadora da Universidade Estadual do Oeste do Paraná (UNIOESTE, Cascavel.

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Published

2021-03-08

How to Cite

Viana, A., Freitas, E. M. de, & Silva, S. M. (2021). Morphology, anatomy and leaf ultrastructure of Froelichia tomentosa (Mart.) Moq. (Amaranthaceae) - a critically endangered species in Brazil. Ciência E Natura, 43, e26. https://doi.org/10.5902/2179460X40503

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Section

Biology-Botany

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