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http://dx.doi.org/10.5657/KFAS.2021.0311

Growth Differences in Edible Caulerpa okamurae (Weber-van Bosse) Thallus Parts with and without Apex Removal  

Shin, Ji Ha (Faculty of Biological Science and Institute of Basic Natural Science, Wonkwang University)
Park, Seo Kyung (Faculty of Biological Science and Institute of Basic Natural Science, Wonkwang University)
Choi, Han Gil (Faculty of Biological Science and Institute of Basic Natural Science, Wonkwang University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.54, no.3, 2021 , pp. 311-317 More about this Journal
Abstract
Growth differences in Caulerpa okamurae thallus parts and the effects of apex removal on growth were examined. Erect fronds, stolons, and erect fronds with stolons (erect+stolon) were grown for 14 days, whereas erect fronds without and with apex removal (-A and +A fronds, respectively), were grown for 25 days. The relative growth rates (RGR) of C. okamurae thallus parts ranged from 1.91% to 4.93% day-1 with maximal and minimal RGR for the stolon and erect+stolon treatments, respectively. Over the 25 days in culture, the -A fronds showed a higher RGR (2.48% day-1) than the +A fronds (1.96% day-1). More new erect fronds and stolons were produced by -A fronds than those by +A fronds. In addition, basal cutting of erect C. okamurae fronds resulted in a greater plant length increase than that obtained from top cutting. These findings indicate that vegetative growth is common in C. okamurae, which has excellent wound healing ability, and cutting damage to erect fronds may stimulate enhanced vegetative growth. Thus, we suggest that stolons and erect fronds of C. okamurae could be used as seeding materials for large scale cultivation. Furthermore, this edible species could be a potential seaweed resource for rapid skin regeneration cosmetics.
Keywords
Caulerpa okamurae; Erect frond; Growth; Stolon; Vegetative growth;
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