Do Quantity and Quality of Irradiance Influence Migration Behavior Motile Cells of the Green Alga, Ulva fasciata?

Hyun-Woung Shin¹, Han Seong Lee¹, Sang Mok Jung¹, Min Kyu Choo¹, Ji Young Cho¹, Kwang Soo Lee², Celia M. Smith³

¹Department of Life Science and Biotechnology, Soonchunhyang University, Asan City, South Korea.
²Department of Sport Science, Soonchunhyang University, Asan City, South Korea.
³Department of Botany, University of Hawaii, Honolulu, USA.

DOI: 10.4236/ojms.2014.44028                

Abstract

Motile cells of the green alga, Ulva fasciata respond to the quantity and quality of irradiance simultaneously. The specific responses of motile cell types (gametes and spores) by irradiance influence migration behavior in coastal water environment. Gametes maximally aggregated at the highest white light intensity (250 μmol·m^-2·s^-1), while spores maximally aggregated in the dark (0 μmol m^-2·s^-1) of this study. Gametes maximally aggregated in green irradiance over blue, red and dark while spore maximally aggregated in the dark. The results of quantity are spectral responses are likely to be underline the ecological success and physiological strategies in varied irradiance environments includes: 1) gametes respond to specific quantities and spectral irradiance; 2) spores respond negatively to quantity and quality of irradiance to enhance the probability of finding substratum; and 3) populations of adults that come from these motile cells behaviors. The specific quantities and spectral qualities of irradiance responses show specific ecological migration that can be attributed to photosynthesis under limiting irradiance in coastal waters for the motile cells of U. fasciata.

Keywords

Irradiance, Migration Behavior, Ulva fasciata, Gamete, Spore

Conflicts of Interest

The authors declare no conflicts of interest.

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