Abstract
Problem statement: In Durango, Mexico, mescal is elaborated from wild plants of Agave durangensis . This species shows a high morphological variabili ty within and among populations, what makes its taxonomic delimitation a hard task. Approach: In this study the pollen and foliar phenolic compositions of Agave durangensis were analyzed by HPLC/DAD with the aim of determining the significance of phenol profiles to delimit this tax on. Results: The foliar phenol compositions were evaluated within and among two populations and between juvenile and adult plants. Agave asperrima Jacobi, Dasylirion sp. and juvenile samples of A. shrevei Gentry subsp. shrevei , A. shrevei Gentry subsp. matapensis Gentry and A. wocomahi Gentry, were also analyzed to stand comparisons wi th. The results from this study indicated that pollen and f oliar tissues of Agave durangneisis were rich in kaempferol glycoside derivatives (13 and 23 differe nt compounds can be present, respectively). Principal coordinates analysis (PCO), based on foli ar profiles of adults, indicated the presence of several chemotypes within the Type locality of Agave durangensis and revealed chemical differences between the both analyzed populations. Conclusion/Recommendations: Chemical and morphological differences and biogeographical evidence suggest th e recognition of two different taxonomic entities i n this morphological variable group.
Highlights
Agave is the biggest genus of the familyAgavaceae, with around 166 species, from which grow in Mexico[1,2]
In Mexico, with exception of Agave tequilana Weber var. azul, species like Agave durangensis, which support local industries of alcoholic beverages and which with just begin an industrialization process, techniques are needed to guarantee the botanical origin of plants, according to the respective origin denomination statement
Mature flowers of four individuals from two different populations of A. durangensis were collected for phenol composition analysis
Summary
Agave is the biggest genus of the familyAgavaceae, with around 166 species, from which grow in Mexico[1,2]. Relevant ethnobotanic relationships have been established between the elements of this genus and the ancient and present cultures of Mexico[3,4]. Several authors have described the use of Agave as source of fibers, food and beverages[5]. The relevance of Agave has increased meanly because of the increased demand of alcoholic beverages like tequila and mescal[7] and the research on potential sources of prebiotics[8]. Azul, species like Agave durangensis, which support local industries of alcoholic beverages and which with just begin an industrialization process, techniques are needed to guarantee the botanical origin of plants, according to the respective origin denomination statement. Scientific Research Center of Yucatán, México, pp: 5-12. Scientific Research Center of Yucatán, Mexico, pp: 402
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