Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L

Most commercial products of dehulled hemp seeds frequently include dark green remnants of shells. The entire removal of shell particles including seed coats and pericarp pieces can improve the quality of hempseed-based products. In this study, the structural characteristics of fruit walls (pericarp)...

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Main Authors: Eun-Soo Kim, Tae-Hyung Kwon, Sang-Hyuck Park
Format: Article
Language:English
Published: Taylor & Francis Group 2023-08-01
Series:Journal of Natural Fibers
Subjects:
Online Access:http://dx.doi.org/10.1080/15440478.2023.2216951
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author Eun-Soo Kim
Tae-Hyung Kwon
Sang-Hyuck Park
author_facet Eun-Soo Kim
Tae-Hyung Kwon
Sang-Hyuck Park
author_sort Eun-Soo Kim
collection DOAJ
description Most commercial products of dehulled hemp seeds frequently include dark green remnants of shells. The entire removal of shell particles including seed coats and pericarp pieces can improve the quality of hempseed-based products. In this study, the structural characteristics of fruit walls (pericarp) and seed coats of Cannabis sativa were examined using scanning electron microscopy. The pericarp was comprised of three distinct zones, exo-, meso-, and endocarp. The exocarp and the mesocarp were tightly fused to form a thick layer. The endocarp was characterized by its sclerenchymatous columnar cells, which contained greatly thickened and multi-porous cell walls. On the other hand, the seed coats were comprised of two leathery coats, the outer and inner coats. The outer seed coat was a conspicuous layer with a reticular-shaped structure like a net. However, the three-layered inner seed coat was composed of two thin layers (inner seed coat 2, inner seed coat 3) and a large rectangular cell layer (inner seed coat1) at the lower position. This work provides a better understanding of the structural characteristics of hemp shells. It will lead to the improvement of dehulling machinery of hempseed and help ensure stringent quality control of hempseed-based products.
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spelling doaj.art-ae7fa37915d74d15943de45f64ec25082023-09-25T10:29:01ZengTaylor & Francis GroupJournal of Natural Fibers1544-04781544-046X2023-08-0120210.1080/15440478.2023.22169512216951Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa LEun-Soo Kim0Tae-Hyung Kwon1Sang-Hyuck Park2Colorado State UniversityChuncheon Bioindustry FoundationColorado State UniversityMost commercial products of dehulled hemp seeds frequently include dark green remnants of shells. The entire removal of shell particles including seed coats and pericarp pieces can improve the quality of hempseed-based products. In this study, the structural characteristics of fruit walls (pericarp) and seed coats of Cannabis sativa were examined using scanning electron microscopy. The pericarp was comprised of three distinct zones, exo-, meso-, and endocarp. The exocarp and the mesocarp were tightly fused to form a thick layer. The endocarp was characterized by its sclerenchymatous columnar cells, which contained greatly thickened and multi-porous cell walls. On the other hand, the seed coats were comprised of two leathery coats, the outer and inner coats. The outer seed coat was a conspicuous layer with a reticular-shaped structure like a net. However, the three-layered inner seed coat was composed of two thin layers (inner seed coat 2, inner seed coat 3) and a large rectangular cell layer (inner seed coat1) at the lower position. This work provides a better understanding of the structural characteristics of hemp shells. It will lead to the improvement of dehulling machinery of hempseed and help ensure stringent quality control of hempseed-based products.http://dx.doi.org/10.1080/15440478.2023.2216951achenecannabisendocarpmesocarpperianthpericarpseed coatshell
spellingShingle Eun-Soo Kim
Tae-Hyung Kwon
Sang-Hyuck Park
Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L
Journal of Natural Fibers
achene
cannabis
endocarp
mesocarp
perianth
pericarp
seed coat
shell
title Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L
title_full Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L
title_fullStr Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L
title_full_unstemmed Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L
title_short Structural Characteristics of Shells in a Fibrous Cultivar of Cannabis sativa L
title_sort structural characteristics of shells in a fibrous cultivar of cannabis sativa l
topic achene
cannabis
endocarp
mesocarp
perianth
pericarp
seed coat
shell
url http://dx.doi.org/10.1080/15440478.2023.2216951
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