Summary of Study ST000508

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench,, where it has been assigned Project ID PR000381. The data can be accessed directly via it's Project DOI: 10.21228/M8SW34 This work is supported by NIH grant, U2C- DK119886.


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Study IDST000508
Study TitleMetabolic Profiling of Date Palm Fruits
Study SummaryIn this study, two independent large cohorts of mature dates exhibiting substantial diversity in origin, varieties and fruit processing conditions were measured by metabolomics techniques in order to identify major determinants of the fruit metabotype. Additional samples reflecting different stages of date fruit ripening process has been included for 10 different fruit varieties.
Weill Cornell Medicine, Qatar
DepartmentBioinformatics Core
LaboratorySuhre Lab
Last NameSuhre
First NameKarsten
AddressEducation City
Submit Date2016-11-14
Analysis Type DetailGC-MS/LC-MS
Release Date2017-01-14
Release Version1
Karsten Suhre Karsten Suhre application/zip

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Collection ID:CO000524
Collection Summary:In the present study, 123 unique date varieties (Phoenix dactylifera) from 14 countries were collected in two separate occasions: A first collection took part in 2012 (DS1) and the second one in 2013 (DS2). The term variety is used here to describe a distinct phenotypic class of dates and if the same variety was collected from different countries, a different sample ID was assigned to each collected sample per country. Overall, dates from the first sample collection were mostly from the Gulf region obtained in a fairly dried condition from shops and festivals whilst the second sample collection was dominated by North African dates obtained mostly fresh from the palm trees. For the second collection of dates, field work permissions were obtained verbally from owners of visited oases. The marketed versus fresh nature of dates between the two sample collections implies varying post-harvest conditions. All collected dates with homogenous brown color were further dried by exposing them to open air for two weeks before further processing. With the second sample collection, while harvesting ripened fruits from the palm trees, immature fruits still undergoing ripening activity and occasionally late green Kimri fruits from the pre-ripening stage were collected when available. In total, 37 immature date fruits, corresponding to 10 date samples, were collected. With each of the 10 samples, the immature fruits were ranked by their extent of ripening based on visual assessment of color change and skin wrinkling. Each fruit was given an ID based on a combination of the sample number and a letter reflecting the fruit rank within the sample. In general, dates were considered mature if the low moisture prevented any further change in their appearance. Notably, maturity is attained naturally with the dry class of dates but often artificially with the soft class of dates owing to intrinsically higher moisture levels.
Sample Type:Date palm fruit
Collection Location:Differnt locations specified in the
Collection Duration:2012 - 2013
Storage Conditions:-80C