Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata
Among the triad spinning units for capture thread producing system in the orb-web spiders, aqueous gluey substances are produced from two pairs of aggregate silk glands (ASG). Although biochemical analysis of glue substance is produced by way of their passage through the ASG, its structural modifica...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-11-01
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| Series: | Animal Cells and Systems |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/19768354.2018.1546227 |
| _version_ | 1818257555884867584 |
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| author | Myung-Jin Moon |
| author_facet | Myung-Jin Moon |
| author_sort | Myung-Jin Moon |
| collection | DOAJ |
| description | Among the triad spinning units for capture thread producing system in the orb-web spiders, aqueous gluey substances are produced from two pairs of aggregate silk glands (ASG). Although biochemical analysis of glue substance is produced by way of their passage through the ASG, its structural modifications in the nodular area have been nearly neglected till now. This paper focused on identifying the fine structural characteristics of the aggregate nodules in the golden orb-web spider Nephila clavata using both of light and transmission electron microscopes. The ASG in N. clavata is composed of a multi-lobed secretory region and a thick excretory duct surrounded by large irregular nodules. Histological analysis of the nodules demonstrates that the nodule forming cells have extensive membrane-bound tubular system that is continuous with the surface membrane. In particular, the nodule forming cells contain numerous mitochondria and glycogen particles within their cytoplasms, and they are surrounded by the same sheath of thin connectives. As previously described, each gluey droplet is formed of a central glycoprotein mass surrounded by an aqueous covering components, the nodular organization in N. clavata indicates that the extensive membrane system is thought to have a function for gluey silk production in spider. The results of this study also strengthen the premise that spider glues are made of glycoproteins, and the aggregate nodule functions as a key component for the spider web glue production. |
| first_indexed | 2024-12-12T17:45:31Z |
| format | Article |
| id | doaj.art-7f57e6aaa73d4095b2d61191375464ed |
| institution | Directory Open Access Journal |
| issn | 1976-8354 2151-2485 |
| language | English |
| last_indexed | 2024-12-12T17:45:31Z |
| publishDate | 2018-11-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Animal Cells and Systems |
| spelling | doaj.art-7f57e6aaa73d4095b2d61191375464ed2022-12-22T00:16:56ZengTaylor & Francis GroupAnimal Cells and Systems1976-83542151-24852018-11-0122642142810.1080/19768354.2018.15462271546227Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavataMyung-Jin Moon0Dankook UniversityAmong the triad spinning units for capture thread producing system in the orb-web spiders, aqueous gluey substances are produced from two pairs of aggregate silk glands (ASG). Although biochemical analysis of glue substance is produced by way of their passage through the ASG, its structural modifications in the nodular area have been nearly neglected till now. This paper focused on identifying the fine structural characteristics of the aggregate nodules in the golden orb-web spider Nephila clavata using both of light and transmission electron microscopes. The ASG in N. clavata is composed of a multi-lobed secretory region and a thick excretory duct surrounded by large irregular nodules. Histological analysis of the nodules demonstrates that the nodule forming cells have extensive membrane-bound tubular system that is continuous with the surface membrane. In particular, the nodule forming cells contain numerous mitochondria and glycogen particles within their cytoplasms, and they are surrounded by the same sheath of thin connectives. As previously described, each gluey droplet is formed of a central glycoprotein mass surrounded by an aqueous covering components, the nodular organization in N. clavata indicates that the extensive membrane system is thought to have a function for gluey silk production in spider. The results of this study also strengthen the premise that spider glues are made of glycoproteins, and the aggregate nodule functions as a key component for the spider web glue production.http://dx.doi.org/10.1080/19768354.2018.1546227Aggregate glandnoduleglueNephila clavatasilkspider |
| spellingShingle | Myung-Jin Moon Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata Animal Cells and Systems Aggregate gland nodule glue Nephila clavata silk spider |
| title | Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata |
| title_full | Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata |
| title_fullStr | Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata |
| title_full_unstemmed | Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata |
| title_short | Fine structure of the aggregate silk nodules in the orb-web spider Nephila clavata |
| title_sort | fine structure of the aggregate silk nodules in the orb web spider nephila clavata |
| topic | Aggregate gland nodule glue Nephila clavata silk spider |
| url | http://dx.doi.org/10.1080/19768354.2018.1546227 |
| work_keys_str_mv | AT myungjinmoon finestructureoftheaggregatesilknodulesintheorbwebspidernephilaclavata |