Return to study ST000508 main page

MB Sample ID: SA026329

Local Sample ID:91A
Subject ID:SU000530
Subject Type:Date palm fruit
Subject Species:Phoenix dactylifera
Taxonomy ID:42345
Species Group:Plant

Select appropriate tab below to view additional metadata details:


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