| Cultivation of Gracilaria chorda (Gracilariales, Rhodophyta) by Vegetative Regeneration
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| Ji Hwan Kim, Sa Dong Lee, Sung-Je Choi1, Ik Kyo Chung2 and Jong-Ahm Shin3,*
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Jangheung Maritime Affairs and Fisheries Office, Yeosu Regional Maritime Affairs and Fisheries Office, Jangheung 529-801,
1Haenam Maritime Affairs and Fisheries Office, Mokpo Regional Maritime Affairs and Fisheries Office, Haenam 536-812,
2Department of Marine Science, Pusan National University, Busan 609-735 and
3Department of Aquaculture, College of Fisheries and Ocean Sciences, Yosu National University, Yeosu 550-749, Korea
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| ABSTRACT |
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To make a preliminary identification of the gracilarioid plant attached to cultivation ropes of Undaria pinnatifida and establish a method of cultivating this plant, the first taxonomic and cultivation studies on this species in Korea were conducted. This gracilarioid plant was identified from its morphological and anatomical features, as Gracilaria chorda. Growth tests using the 10, 20, and 30 cm cuttings of axes of G. chorda were performed twice, from May 3 to August 21, 2002 and from December 15, 2002 to April 3, 2003 in Ihoijin aquafarm, Hoijin, Jangheung, Jeollanamdo, Korea. In the first growing test, the thallus length of the 10, 20, and 30 cm cuttings increased twelve-fold, ten-fold, and seven-fold; the wet weight increased 81-fold, 60-fold, and 41-fold; the numbers of more than 10 cm-long branches increased 3.8-fold, 5.2-fold, and 6.1-fold, respectively. In the second growth test, the thallus length of the 10, 20, and 30 cm cuttings increased seven-fold, 5.5-fold, and four-fold; the wet weight increased 81-fold, 53-fold and 36-fold; the number of branches increased 3.8-fold, 7.3-fold, and 6.6-fold, respectively. The cultivation of G. chorda by vegetative regeneration using cuttings of thallus axes was successful for the first time in Korea.
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| Key words:
cultivation, Gracilaria chorda, vegetative regeneration |
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