Cytotoxic lignans from Larrea tridentata

2005 ◽  
Vol 66 (7) ◽  
pp. 811-815 ◽  
Author(s):  
Joshua D. Lambert ◽  
Shengmin Sang ◽  
Ann Dougherty ◽  
Colby G. Caldwell ◽  
Ross O. Meyers ◽  
...  
Keyword(s):  
Larrea Tridentata

scholarly journals Ethnobotanical biocultural diversity by rural communities in the Cuatrociénegas Valley, Coahuila; Mexico

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Eduardo Estrada-Castillón ◽  
José Ángel Villarreal-Quintanilla ◽  
Juan Antonio Encina-Domínguez ◽  
Enrique Jurado-Ybarra ◽  
Luis Gerardo Cuéllar-Rodríguez ◽  
...  
Keyword(s):  
Rural Communities ◽  
Exotic Species ◽  
Protected Area ◽  
Indigenous Communities ◽  
Larrea Tridentata ◽  
Biocultural Diversity ◽  
Ethnobotanical Knowledge ◽  
Structured Interviews ◽  
Biosphere Reserves ◽  
Rural Landscapes

Abstract Background Cuatrociénegas, part of the Chihuahuan Desert, is a region of unique biological, geological, geographical, and evolutionary importance. Its current population is mestizo; nevertheless, it has high national historical, cultural, and touristic relevance in Mexico. It has been cataloged as nationally significant for its flora and fauna by Mexican law, as well as being designated a High Protection site by the World Wildlife Fund and UNESCO. Because of its diverse and complex biological and sociocultural characteristics, we considered it important to determine, identify, and analyze various aspects of the traditional ethnobotanical knowledge and practices in this region. Methods Between 2016 and 2019, seven field trips were made to document the knowledge and use of flora. Cuatrociénegas is a protected area, collecting botanical material is regulated, so specimens were photographed and collected in neighboring communities, and in public and private gardens. Later permission was obtained to complete the collection of specimens (2019–2020). The plants were identified and entered into the flora database of the state of Coahuila, and deposited in the Herbarium of the Faculty of Forest Sciences, Autonomous University of Nuevo León, Mexico. One hundred ten local residents (50 men and 60 women), aged between 27 and 91 years, were interviewed (semi-structured interviews). The cultural importance of ethnobotanical resources (cultural significance index) and its significance with respect to ethnobotanical richness in other Biosphere Reserves in Mexico (Mann-Whitney test), and similarities in the diversity of exotic species (Sørensen index) were studied. Results and discussion The ethnobotanical information registers 158 species and 132 genera in 57 vascular and non-vascular families, documenting a greater knowledge and use of cultivated species (84) with respect to wild species (74). The diversity of plants reported is compared to other ethnobotanical studies carried out in Mexican Biosphere Reserves. These results are highly relevant, in spite of unique exotic species. The people local pay special attention to medicinal and ornamental plants. The species that presented the highest use values are Larrea tridentata, Jatropha dioica, and Machaeranthera pinnatifida, three species characteristic of the desert region. Conclusions The particular diversity of wild flora in Cuatrociénegas Valley, combined with the varied introduced flora, is an important multifunctional resource. Special attention to introduced species is associated with harvesting use restrictions in the protected area as well as the high value of ornamental species that are difficult to maintain in desert areas. The extensive use of ethnobotanical knowledge is an example that biocultural diversity (at the conceptual level) is also strongly associated with socio-ecological systems incorporating mestizo groups and semi-urban rural landscapes, thus ceasing to be an exclusive focus of indigenous communities and regions.

Photosynthetic responses of Larrea tridentata to a step-increase in atmospheric CO2at the Nevada Desert FACE Facility

2000 ◽  
Vol 44 (4) ◽  
pp. 425-436 ◽  
Author(s):  
E.P Hamerlynck ◽  
T.E Huxman ◽  
R.S Nowak ◽  
S Redar ◽  
M.E Loik ◽  
...  
Keyword(s):  
Larrea Tridentata ◽  
Photosynthetic Responses

scholarly journals Composición química y efecto antibacteriano in vitro de extractos de Larrea tridentata, Origanum vulgare, Artemisa ludoviciana y Ruta graveolens

Nova Scientia ◽  
2017 ◽  
Vol 9 (19) ◽  
pp. 273 ◽  
Author(s):  
Lucía Delgadillo Ruiz ◽  
Rómulo Bañuelos Valenzuela ◽  
Olivia Delgadillo Ruiz ◽  
Mónica Silva Vega ◽  
Perla Gallegos Flores
Keyword(s):  
Escherichia Coli ◽  
Larrea Tridentata ◽  
Ruta Graveolens ◽  
Origanum Vulgare ◽  
Acinetobacter Baumanii

Introducción: Los extractos de algunas plantas han demostrado tener propiedades antimicrobianas relacionadas a ciertos compuestos químicos como son el timol, carvacrol, limoneno, linalol y terpineno. El objetivo del presente trabajo fue determinar la concentración de estos compuestos en los extractos de Larrea tridentata, Origanum vulgare, Artemisa ludoviciana y Ruta graveolens; así como evaluar su efecto antimicrobiano en Escherichia coli, Acinetobacter baumanii, Pseudomona sp y Staphylococcus aureus.Método: Los extractos se obtuvieron por destilación simple empleando alcohol etílico como solvente, la composición química se evaluó mediante cromatografía de gases. La actividad antimicrobiana de cada uno de los extractos de plantas se realizó por los métodos difusión en pozo y difusión en disco.Resultados: Las bacterias mostraron diferentes grados de sensibilidad a los extractos, presentando inhibición de crecimiento S. aureus con el extracto de O. vulgare y R. graveolens, mientras que la bacteria Pseudomona sp. con los extracto de A. ludoviciana, L. tridentata y O. vulgare.Discusión o Conclusión: La mayor concentración de timol y carvacrol se encontró en los extractos de O. vulgare y L. tridentata. El compuesto linalol se encontró en una proporción mayor en O. vulgare y en menor proporción en A. ludoviciana. Limoneno se encontró en los extractos de O. vulgare y R. graveolens. De las cuatro plantas evaluadas, el extracto de L. tridentata fue mejor debido a que presenta la mayor inhibición en comparación con los otros extractos; y con un efecto similar a los aceites empleados como control. La técnica de difusión en disco, permitió observar mejor los efectos inhibitorios de los extractos y los aceites sobre cada una de las bacterias empleadas en comparación con el método de difusión en pozo.

A new species of Brethesiella (Hymenoptera: Encyrtidae) from California, USA, a parasitoid of Steatococcus tabernicolus (Hemiptera: Margarodidae)

Zootaxa ◽  
2006 ◽  
Vol 1167 (1) ◽  
pp. 1 ◽  
Author(s):  
VLADIMIR A. TRJAPITZIN ◽  
SERGUEI V. TRIAPITSYN
Keyword(s):  
New Species ◽  
Mojave Desert ◽  
New World ◽  
Larrea Tridentata ◽  
Creosote Bush ◽  
Type Series ◽  
A New Species

A new species of the encyrtid wasp genus Brethesiella Porter, 1920 is described from the Mojave Desert in California, USA. The type series of B. mojave sp. n. was reared from the margarodid scale Steatococcus tabernicolus Ferris on creosote bush, Larrea tridentata. The genus Aztecencyrtus Timberlake, 1926 is synonymized under Brethesiella and its two described species are transferred to the latter as B. flava (Timberlake, 1926) comb. n. and B. iceryae (Howard, 1892) comb. n. A brief review of the encyrtid parasitoids of Margarodidae, a diagnosis of Brethesiella, and an annotated key to its six described species with known females in the New World are provided.

Dietary selection by goats and the implications for range management in the Chihuahuan Desert: a review

2016 ◽  
Vol 38 (4) ◽  
pp. 331 ◽  
Author(s):  
M. Mellado
Keyword(s):  
Chihuahuan Desert ◽  
Good Condition ◽  
Secondary Compounds ◽  
Field Studies ◽  
Arid Environment ◽  
Larrea Tridentata ◽  
Desert Rangelands ◽  
Lactating Goats ◽  
Varied Diet ◽  
Sources Of Variation

Field studies characterising the forage resources of mixed-breed goats on Chihuahuan Desert rangelands were reviewed and the principal sources of variation in their diet choices discussed. Goats eat a varied diet comprising at least 126 plant species in this landscape. Goats are highly selective feeders, changing their diet from predominantly forbs (8–64%) to browse (35–88%). Graminoids make up only ~5% of the diet, but grasses could be important dietary components on rangelands in good condition. Feed intakes range between 0.8% and 3.4% of bodyweight, depending on the season. DM digestibility of forage selected by goats ranges between 44% and 65%. Annual crude protein (CP) in forages selected by goats varies from 80 to 160 g CP kg–1 DM. Overall, pregnant and lactating goats manage to ingest food that contains higher amounts of CP and lower amounts of cell wall than non-pregnant, non-lactating goats. Goats not adapted to severe shortage of forage select a diet that does not match their nutritional requirements and fetal losses occur. Goat kids select higher quality diets than do mature goats (94.5 vs 88.5 g CP kg–1 DM). Granadina goats eat ~20% more shrubs, including 3-fold more Larrea tridentata (DC) Cav., than Nubian goats. Goats with severely eroded incisors avoid grasses, focusing on tender-leaved shrubs. During the rainy season, bucks select mainly shrubs (78% of the diet) and avoid grasses (1.7% of the diet), whereas does rely heavily on forbs (about one-third of their diet). Alternating use of grazing grounds increases shrub ingestion by 25%. No evidence exists indicating that food choice by goats in this arid environment is biased towards forages with lower secondary compounds. It is concluded that the flexible, broad-scale and opportunistic feeding behaviour of goats make them an effective animal to sustainably exploit the forage resources of the Chihuahuan Desert.

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