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Variable tensility of the ligaments in the stalk of sea-lily
| Title: | Variable tensility of the ligaments in the stalk of sea-lily. |
 88 views 19 downloads |
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| Name(s): |
Wilkie, Iain C., creator Emson, Roland H., creator Young, Craig M., creator Harbor Branch Oceanographic Institute |
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| Type of Resource: | text | |
| Genre: | Article | |
| Issuance: | single unit | |
| Date Issued: | 1994 | |
| Publisher: | Elsevier B.V. | |
| Extent: | 10 p. | |
| Physical Description: | ||
| Language(s): | English | |
| Identifier: | 3331885 (digitool), FADT3331885 (IID), fau:6137 (fedora), 10.1016/0300-9629(94)90203-8 (doi) | |
| Note(s): |
The stalk of isocrinid sea-lilies consists largely of skeletal plates linked by collagenous ligaments. Although lacking contractile tissue, it can bend in response to external stimuli. The stalk of Cenocrinus asterius was tested mechanically to determine whether the mechanical properties of its ligaments are under physiological control. In bending tests, ligaments at the mobile symplexal junctions showed a limited “slackening” response to high K+ concentrations which was blocked reversibly by the anaesthetic propylene phenoxetol. In bending tests and uniaxial loading tests, ligaments at the normally rigid synostosal junctions ruptured in response to high K+, confirming that these junctions are specialized for autotomy. It is concluded that the ligaments are mutable collagenous structures whose presence explains the mechanical versatility of the isocrinid stalk. This manuscript is an author version with the final publication available by http://www.sciencedirect.com/science/journal/03009629 and may be cited as: Wilkie, I. C., Emson, R. H., & Young, C. M. (1994). Variable tensility of the ligaments in the stalk of sea-lily. Comparative Biochemistry and Physiology Part A: Physiology, 109(3), 633-641. doi:10.1016/0300-9629(94)90203-8 Florida Atlantic University. Harbor Branch Oceanographic Institute contribution #1052. |
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| Subject(s): |
Crinoidea Tensile Strength Stalks (Botany) Stems (Botany) |
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| Persistent Link to This Record: | http://purl.flvc.org/FCLA/DT/3331885 | |
| Links: | http://dx.doi.org/10.1016/0300-9629(94)90203-8 | |
| Restrictions on Access: | ©1994 Elsevier B.V. | |
| Host Institution: | FAU |
