Comparative Ultrastructural and Biochemical Studies of Four Demosponges from Gulf of Mannar, India  

Ramjee Pallela1,2 , Venkateswara Rao Janapala1
1. Toxicology Unit, Biology Division, Indian Institute of Chemical Technology, Hyderabad-500007. India
2. Synthetic Biology and Biofuels Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi-110067. India
Author    Correspondence author
International Journal of Marine Science, 2013, Vol. 3, No. 37   doi: 10.5376/ijms.2013.03.0037
Received: 04 Jun., 2013    Accepted: 03 Jul., 2013    Published: 22 Jul., 2013
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Pallela and Janapala, 2013, Comparative Ultrastructural and Biochemical Studies of Four Demosponges from Gulf of Mannar, India, Indonesia, International Journal of Marine Science, Vol.3, No.37 295-305 (doi: 10.5376/ijms.2013.03.0037)


Marine sponge explorations at Gulf of Mannar (GoM), India in the past few years (2003-2009) revealed around forty sponge species that lead to various comprehensive studies on chemicobiological molecules including collagens and their applications. Basing on the preliminary evaluations on collagen content, four marine sponges Hyattella cribriformis, Fasciospongia cavernosa, Callyspongia fibrosa and Dysidea fragilis belong to the families Spongiidae, Thorectidae, Callyspongiidae and Dysideidae of the class Demospongiae, were chosen for macromolecular and micro-anatomical comparison. Microscopic examinations were performed to understand the form and arrangement of skeletal components in each sponge, where unique skeletal composition and spongin distribution is typical for all the sponges except D. fragilis, which is highly embedded with diversified oxeae. Biochemical analyses were performed to resolve the macromolecular content for each sponge species. Sponge D. fragilis was found to possess less protein content (57.26±3.36 mg/g freeze-dried sponge wt) when compared to other sponges and significantly, C. fibrosa possess high protein (209.55±9.53 mg/g) and other macromolecular contents, except pentose (24.12±1.21 mg/g). Different forms of collagens viz., Acid soluble (AS), salt soluble (SS) and insoluble (Ins) collagens are estimated to understand the variation in collagen make up in their respective tissues. The higher collagen content in C. fibrosa could propose to use this species as a potential model for targeting collagenous molecules towards human health benefits.

Marine sponges; Demospongiae; Biochemical; Collagen; Electron microscopy; Gulf of Mannar
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