RESUMEN
Playa La Vaca está ubicada al noroeste de la ciudad de Moa y desde principios del siglo XX ha sido objeto de interés para los botánicos. Aunque no se ha constatado la existencia de obras publicadas que caractericen la vegetación de esta área clásica de colecta existen muestras de materiales depositados en los herbarios cubanos y extranjeros. La flora y vegetación de esta localiad se desarrolló en suelos derivados de serpentinitas, de las cuales varios autores expresan que son áreas de gran endemismo; esto fundamenta la necesidad de conocer y registrar los valores de diversidad vegetal de esta localidad. Este trabajo abarca una primera parte de la investigación realizada en esta localidad y tiene como objetivo la delimitación y caracterización de las formaciones vegetales presentes en Playa La Vaca. Para esto se recopiló información de la bibliografía y las colectas de plantas realizadas en Playa La Vaca depositadas en el herbario HAC provenientes de las expediciones botánicas y se efectuaron anotaciones en recorridos del trabajo de campo, identificándose 10 formaciones vegetales. Se obtuvo el mapa de vegetación a través del uso de un Sistema de Información Geográfica.
Playa La Vaca is located northwest of Moa city. Since the early twentieth century it has been an interestin site for botanists. There aren't any publication characterizing the vegetation of this classic collection area but it is possible to find a lot of sample materials from this site in Cuban and foreign herbals instead. The flora and vegetation of Playa La Vaca was developed on soils wich are derived from serpentinite rock, because of this, several authors states that this area is of high endemism. This fact, substantiates the need to study and record the diversity value of Playa La Vaca, thus contributing with the sustainable management of the area. This paper covers the first part of the research work conducted in Playa La Vaca locality and it aims to the characterization of plant communities of this site. For this work, it was used information obtained from fieldwork. Information from bibliography and plants collections from Playa La Vaca, deposited in the HAC herbarium were consulted too. Ten plants communities were identified in the locality. The vegetation map was obtained through the use of a Geographic Information System.
Asunto(s)
Humanos , Plantas , Flora , Herbario , Setaria (Planta)RESUMEN
Objective To determine the contents of methylophiopogonanone A (MOA) and methylophiopogonanone B (MOB) in Radix Ophiopogonis and its extracts. Methods An HPLC-UV method was used for determining the contents of MOA and MOB in all samples. Analytical column was Kromasil C18 (250 mm?4.6 mm, 5 ?m). Mobile phase was acetonitrle-water (55∶45) and detection wavelength was 298 nm. The flow rate of mobile phase was 1 mL/min, and temperature was 30 ℃. Results The contents of MOA in Radix Ophiopogonis cropped in Sichuan and Zhejiang Provinces were 0.004 0%-0.009 6%, 0.006 7%-0.013 4%, and the contents of MOB were 0.002 1%-0.006 2%, 0.015 9%-0.028 2%, respectively. The contents of MOA in the extract of Radix Ophiopogonis cropped in Sichuan and Zhejiang Provinces were 0.007 5%-0.008 8%, 0.011 2%-0.012 6%, and the contents of MOB were 0.003 8%-0.005 1%, 0.020 7%-0.023 8%, respectively. Conclusion The contents of MOA and MOB in Radix Ophiopogonis cropped in Zhejiang Province and its extracts are more than those in Sichuan Province and its extrouts. The method can be used for the purpose of the quality control of Radix Ophiopogonis and its extracts.