| Home | E-Submission | Sitemap | Contact Us |  
ALGAE > Volume 11(1); 1996 > Article
ALGAE 1996;11(1): 23-34.
Morphological Variations of the Marine Diatom Thalassiosira weissflogii under Culture Conditions
Jae-Shin Kang, Hyung-Sun Kim, Jin Hwan Lee
Department of Biology, Sangmyung University, Department of Biotechnology, Korea Ocean Research & Development Institute
The diatom Thalassiosira weissflogii was cultured under different nitrate-nitrogen, phosphate-phosphorus and silicate-silica concentrations, salinity and water temperature. Specific growth rate was obtained for each group, and specimens were taken from each group while in the stationary phase and were observed with a scanning electron microscope to detect morphological variations. The result showed that the tendency for the average diameter to decrease with a higher specific growth rate was more distinct than the direct influence of nutrient concentration on cell diameter. There were variations in the number of central strutted processes under limited N, P and Si conditions. The number of central strutted processes showed variations according to culture temperature showing from no central strutted process at a low temperature of 10℃ to one central strutted process at a high temperature of 30℃. A variation of number central strutted processes occurred at a low salinity (5-10‰), also. Under limited phsphate-phosphorus conditions, a variation in which the central strutted process moved toward the margin occurred. Also, seashell-shaped areolation was found. When the central strutted process shifted toward the margin, areolation changed to scallop-shaped, also. When silicate-silica was limited, the girdle of the cells elongated 3-10 times their normal length. Under low temperature conditions, a variation of the areolation to the scallop-shaped form occurred, mostly in cells with no central strutted process.
Key words: diatom, nutrients, culture, morphology, variations

PDF Links  PDF Links
Full text via DOI  Full text via DOI
Download Citation  Download Citation
CrossRef TDM  CrossRef TDM
Related article
Morphological Variations of the Marine Diatom Genus Actinoptychus in the Coastal Waters of Korea   1996 ;11(4)
Editorial Office
[14348] A-1716, Gwangmyeong Trade Center, 72 Iljik-ro Gwangmyeong-si. Gyeonggi-do, Korea
Tel: +82-2-899-5980  Fax: +82-2-899-5922    E-mail: editalgae@gmail.com
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © The Korean Society of Phycology. All rights reserved.                 Developed in M2community