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Original Articles

Optimal Growth Environments of Caulerpa okamurae: Combination of Salinity, Nutrients, and Aeration Period

옥덩굴(Caulerpa okamurae)의 최적 생장 환경: 염분, 영양염 및 통기 기간

Seo Kyung Park1
,
Ji Ha Shin1
,
Han Gil Choi1*
박 서경1
,
신 지하1
,
최 한길1*
1Faculty of Biological Science and Institute of Basic Natural Science, Wonkwang University, Iksan 54538, Korea
1원광대학교 생명과학부/기초자연과학연구소
*Corresponding Author
30 June 2021. pp. 25-35
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Abstract

Effects of salinity, nutrient, and aeration period on the growth of edible Caulerpa okamurae were examined. Growth experiments were made of three salinities (20, 30, 40psu) × three nutrient levels (low, mid, high) for 20 days, and five aeration periods (0, 8, 12, 16, 24h day-1) for 15 days. Nutrient levels were autoclaved seawater (ASW), PES30 (30% dilution of PES), and PES50 (50% PES), respectively. Stolon grew faster than erect frond at the combined culture condition of salinities and nutrients. Maximal growth occurred at 30psu × PES30 for erect fronds and 30psu × PES50 for stolon of C. okamurae. Total chlorophylls and chl a content were the highest at 40psu both at erect frond and stolon with no significant between 20~30psu. Total chlorophylls and chl a contents showed relatively low values at a low nutrient and they increased positively with nutrient levels. As cultured at five aeration periods, RGR of C. okamurae was the lowest (4.24% day-1) in stock culture having no aeration and the highest with 6.10% day-1 in the aeration period of 16 h day-1 showing higher growth about 1.4 times than in stock culture.

Keywords
Aeration
Caulerpa okamurae
Growth
Nutrient
Salinity

본 연구는 옥덩굴(Caulerpa okamurae)의 생장에 염분과 영양염 농도의 조합 조건과 일별 통기 기간이 미치는 영향을 파악하기 위하여 수행되었다. 염분(20, 30, 40 psu)과 영양염 농도(ASW, PES30, PES50)에 대한 옥덩굴의 생장 실험은 20일 동안, 그리고 일별 통기기간(0, 8, 12, 16, 24 h day-1) 실험은 15일 간 실시하였다. 염분과 영양염 농도 조합 조건에서 옥덩굴 직립지와 포복지를 배양한 결과, 포복지는 직립지에 비해 빠른 생장을 보였고, 직립지는 30 psu와 PES30 (중영양)에서, 포복지는 30 psu와 고영양인 PES50에서 최대 생장을 나타냈다. 옥덩굴 직립지와 포복지 엽록소 총량과 chl a 함량은 40 psu에서 최대였으나, 20~30 psu와는 유의차는 없었다. 직립지와 포복지 엽록소 총량은 멸균해수(저영양)에서 최소였고 PES50에서 최대였으며, chl a의 함량은 저영양에서 최소였고, PES30과 PES50에서 최대로 나타났다. 옥덩굴 포복지를 15일 동안 통기 배양한 결과, 상대생장률은 정치배양(0 h day-1)에서 4.24% day-1로 최소였고, 일별 16 h 실험구에서 6.10% day-1로 최대였으며, 정치배양보다 1.4배 빠른 생장을 나타냈다.

키워드
생장
염분
영양염
옥덩굴
통기
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Information
  • Publisher :The Korean Society of Phycology
  • Publisher(Ko) :한국조류학회
  • Journal Title :Aquatic Nature
  • Journal Title(Ko) :수생생물
  • Volume : 1
  • No :1
  • Pages :25-35
  • Received Date : 2021-05-18
  • Revised Date : 2021-06-06
  • Accepted Date : 2021-06-08
  • DOI :https://doi.org/10.23135/an.2021.1.1.3
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