Subsidies for propagation of native species in Brazil with medicinal potential: Calophyllum brasiliense Cambess

Abstract

Calophyllum brasiliense Cambess. (guanandi) is a native species with medicinal potential and also generates expectation for commercial use (wood) and for recovery of degraded areas. These seeds have physical and mechanical dormancy, requiring techniques for dormancy release; knowledge of seed and seedling morphology that assists laboratory analysis and propagation of the species is also necessary. The objective of this study was to describe the morphological structures of the seeds and normal and abnormal seedlings of guanandi, and also investigate if complete extraction of the endocarp and the seed coat to overcome dormancy will affect the morphology and initial plant development, and consequently production of transplants. Guanandi seeds are large (1000 seed weight of 1480.9 g) with a hard seed coat; cotyledons account for most of the embryo and serve as a reserve; the embryonic axis is small (1.0-2.0 mm) in relation to the seed, yet it is differentiated. The seedlings have hypogeal cryptocotylar germination, with cotyledonary petioles, taproot, and epicotyl developing into a long stem and a tip protected by cataphylls. The main abnormalities in seedlings are related to the root system. Extraction of the endocarp and seed coat does not alter the morphology of seedlings and promotes their greater development, which may be an advantageous strategy.

Propagation of Cunila galioides Benth.: a Medicinal and Aromatic Species Native to South Brazil

“…Nadeem [10] and Silva and coauthors [11] commented that the study of different propagation methods is the first strategy to safeguard native medicinal species, which, due to the interest, are collected indiscriminately, increasing the risks of extinction and the heterogeneity inherent to different populations and genetic variability.…”

Contribución al conocimiento del árbol leche María ( Calophyllum brasiliense Cambess, Clusiaceae): morfometría, viabilidad y germinación de semillas

“…Cabe señalar que los estudios de viabilidad y germinación de las semillas son de suma importancia para poder desarrollar protocolos de propagación que permitan establecer programas de conservación y manejo (Abud et al 2010;Miransari y Smith 2014). El almacenamiento puede afectar la viabilidad y la capacidad de germinación de la semilla, lo que provocaría reducción en el potencial de producción de cultivos; asimismo, la pérdida de calidad debido al envejecimiento de la semilla puede causar un retraso en el establecimiento en campo, anomalías en las plántulas o incluso la falla de la emergencia (Kandari et al 2012;Sharma y Sharma 2017) (Herrera et al 2006;Sorol et al 2015;Da Silva et al 2019).…”