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Victoria de Durango, Mexico

We studied the Asteraceae flora and its level of endemism in the vicinity of the community El Durazno, northwest of the municipality Tamazula, Durango, Mexico. The locations are difficult to access and are poorly explored areas in the Sierra Madre Occidental. Field trips were conducted to collect botanical material in all four seasons of the year from 2001 to 2014. The floristic richness of the Asteraceae family consisted of 75 genera and 148 species, of which 51[%] are endemic to Mexico. We report 17 new records for the State of Durango. Endemism is high with 50.33[%] of genera and 25.75[%] of species. The main plant communities of the region are found at altitudes between 670 and 2550 m and are represented by: 1) coniferous forest (2050 to 2550 m) where 49.34[%] of the Asteraceae were recorded in this study; 2) Pinus-Quercus forest (1500-1900 m) with 39.47[%] of species; and 3) deciduous tropical forest (600-1000 m) with 22.37[%]. It can be concluded that the richest area for this family occurs in the subhumid temperate ecosystem. Accordingly, 96[%] of genera and 95.27[%] of species are native, and the rest are exotic. Some 27.7[%] of the Asteraceae taxa are synantropic species. © Copyright 2015 Botanical Research Institute of Texas.

Carrillo O.R.,IPN CIIDIR Durango | Arrieta Y.H.,IPN CIIDIR Durango | Elizondo M.S.G.,IPN CIIDIR Durango | Perez N.M.,IPNCBG | And 2 more authors.
Journal of the Botanical Research Institute of Texas | Year: 2013

Karyotypes from two morphotypes in 30 populations of Muhlenbergia rigida (Kunth) Trin. from locations in six states in north central Mexico were analyzed. The basic ploidy (x = 10), tetraploidy (n = 40) and disploidy (n=44) reported previously for the species are confirmed, and triploidy (n = 30) is reported for the first time in 13 of the 30 populations studied. Analysis of karyotypes reveal a correlation among cytotypes and morphotypes of M. rigida. Tnploid cytotypes correspond to the morphotype having open inflorescences whereas tetraploid and disploid plants correspond to the morphotype with dense inflorescences.

Ortiz-Robledo F.,IPN CIIDIR Durango | Villanueva-Fierro I.,IPN CIIDIR Durango | Dave Oomah B.,Agriculture and Agri Food Canada | Lares-Asef I.,IPN CIIDIR Durango | And 2 more authors.
Agrociencia | Year: 2013

Oat (Avena sativa L.) is a cereal grain, its seeds are rich in nutrients, is consumed as whole grain with health benefits for humans due to its antioxidants, such as the avenanthramides (Avns). The contents of Avns 2c, 2f and 2p were evaluated by HPLC in groats and hulls of oat varieties Chihuahua, Cuauhtémoc, Karma and Avemex cultivated in Durango, México. The association of these Avns with protein, fat, crude fiber and ash of oat was also investigated. A 4×2 bifactorial design was used, with the number of varieties and groats or hulls as factors. Avns contents differed significantly (p≤0.05) among oat varieties, groats and hulls. Avemex groats had the highest concentrations of Avns: 3.6±0.7, 3.0±0.5 and 3.3±0.6 mg kg-1 for 2c, 2f and 2p Avns. Avemex groats also had the highest protein content and Avns showed positive correlation with protein content indicating that Avns could be found in oat varieties with high protein content. Karma and Avemex had higher protein content with Avemex containing three times more Avns than other varieties.

Ortiz A.C.,IPN CIIDIR Durango | Arrieta Y.H.,IPN CIIDIR Durango | Corral J.H.,IPN CIIDIR Durango | Velazquez D.H.,IPN CIIDIR Durango
Journal of the Botanical Research Institute of Texas | Year: 2013

In the arid and semiarid region of Mexico, data on three native grasses growing in diverse ecological environments-Muhlenbergia peruviana (P. Beauv.) Steud., in temperate forests; Bouteloua gracilis (Kunth) Lag. ex Griffiths, in grasslands; Muhlenbergia porteri Scnbn. ex Beal, in xeric regions; and one introduced nonnative species, Melinis repens (Willd.) Zizka (Zizka rose Natal grass)-were used in our essay analyzing their potential distribution, based on climatic factors. We took presence-only data applied to the Bioclim algorithm included in the Diva-GIS program. Using database bioclimatic WorldClim-Global Climate Data allowed us to make predictions of the distribution, and to determine the climatic characteristics that each species needs to grow. It generated a potential distribution of the four species under study, concluding that this method can be applied to other grass species from this geographic area in order to improve: a) knowledge of the actual distribution of species in their natural environment, b) knowledge related to biodiversity, and c) to create an indicator to support decisions related to conservation and management of grasses in Mexico. We concluded that possibly climatic requirements prevent the expansion of the introduced species (Zizka rose, Natal grass).

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