Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Anatomy and Histochemistry of the Vegetative Organs of Brachystele guayanensis (Lindl.) Schltr. (Orchidaceae), a Potential Medicinal Species

Version 1 : Received: 5 June 2023 / Approved: 5 June 2023 / Online: 5 June 2023 (16:19:40 CEST)

A peer-reviewed article of this Preprint also exists.

Santos, I.S.; Silva, M.J. Anatomy and Histochemistry of the Vegetative System of Brachystele guayanensis (Lindl.) Schltr. (Orchidaceae), a Potential Medicinal Species. Plants 2023, 12, 2635. Santos, I.S.; Silva, M.J. Anatomy and Histochemistry of the Vegetative System of Brachystele guayanensis (Lindl.) Schltr. (Orchidaceae), a Potential Medicinal Species. Plants 2023, 12, 2635.

Abstract

The orchid genus Brachystele Schltr. comprises 20 species distributed from Mexico to Argentina; 10 are found in Brazil. Anatomical studies of Orchidoideae Lindl. have been scarce, and the anatomy and histochemistry of Brachystele are still largely unknown. We characterized the vegetative organs of B. guayanensis (Lindl.) Schltr. using standard anatomical and histochemical microtechniques. Brachystele guayanensis was observed to display the anatomical characters commonly found in the vegetative organs of representatives of the Orchidaceae and Orchidoideae (including a uniseriate epidermis, thin cuticle, amphistomatic leaves, anomocytic, diacytic and tetracytic stomata, a homogeneous mesophyll, collateral vascular bundles, rhizomes with pericyclic fibers, roots with velamen, uniseriate exodermis, endodermis and pericycle). Histochemical tests confirmed the presence of lignin, proteins, and alkaloids, the lipidic nature of the cuticle, starch grains stored in spiranthosomes in the roots, and the composition of the raphides. Alkaloids were observed in great abundance, especially in the roots, and may have potentially useful medicinal activities, as has been observed in groups phylogenetically related to Brachystele.

Keywords

Alkaloids; Cells; Cranichideae; Ergastic substances; Leaf; Micromorphology; Orchidoideae; Rhizomes; Roots; Spiranthinae

Subject

Biology and Life Sciences, Plant Sciences

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.