How old are large Brazil-nut trees (Bertholletia excelsa) in the Amazon?
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چکیده
منابع مشابه
Diversity and genetic structure of the native Brazil nut tree (Bertholletia excelsa Bonpl.) population.
The present study was carried out in a native Brazil nut tree population (Bertholletia excelsa Bonpl., Lecythidaceae) to assess its genetic diversity and structure. Ten microsatellite markers were used to genotype 198 adult trees (B. excelsa). The population presented high genetic diversity and inbreeding absence rates. The empirical Bayesian method showed three distinct groups in the structure...
متن کاملConstruction of Brazil nut (Bertholletia excelsa: Lecythidaceae) cambium normalized cDNA libraries for 454 next generation sequencing
Background The Brazil nut, Bertholletia excelsa (Lecythidaceae), is the most important non-timber forest resource in the Amazonian biome, where nuts for the international trade are exclusively wild-collected. The monotypic genus possesses a discontinuous distribution and is thought to have rapidly and recently radiated south and westward from a northern/eastern Amazonian origin, largely as a re...
متن کاملDetailed Study of Brazil Nut ( Bertholletia excelsa ) Oil Micro - Compounds : Phospholipids , Tocopherols and Sterols
O óleo da castanha-do-pará (Bertholletia excelsa) foi estudado por causa da sua composição em ácidos graxos, tocoferóis, esteróis e fosfolipídios. A composição de ácidos graxos nos fosfolipídeos também foi estudada. Os resultados foram comparados com os do girassol, da castanha, amêndoa, noz, soja e azeites. O seu alto teor em ácidos graxos insaturados, em b-tocoferol e em b-sitosterol confere ...
متن کاملPurification and biochemical characterization of Brazil nut (Bertholletia excelsa L.) seed storage proteins.
Brazil nut storage proteins, 2S albumin, 7S vicilin, and an 11S legumin, were purified using column chromatography. Analytical ultracentrifugation of the purified albumin, vicilin, and legumin proteins, respectively, registered sedimentation coefficients of 1.8, 7.1, and 11.8 S. Under reducing conditions, the major polypeptide bands in 2S albumin were observed at 6.4, 10-11, and 15.2 kDa. The 7...
متن کاملProduction and characterization of absorbent heat from the bark of residual Brazil nut bark (Bertholletia Excelsa l.)
BACKGROUND The increasing efforts to reduce the environmental impact on the Amazon's natural resources are focusing on watercourses that pass through effluents with high concentrations of heavy metals. The adsorption by absorbent is one of the methods used to remove metallic ions. In this assignment, the preparation of activated carbon from Brazil nut bark (Bertholletia excelsa l.), which is a ...
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ژورنال
عنوان ژورنال: Scientia Agricola
سال: 1994
ISSN: 0103-9016
DOI: 10.1590/s0103-90161994000200028