TITLE:
Do Quantity and Quality of Irradiance Influence Migration Behavior Motile Cells of the Green Alga, Ulva fasciata?
AUTHORS:
Hyun-Woung Shin, Han Seong Lee, Sang Mok Jung, Min Kyu Choo, Ji Young Cho, Kwang Soo Lee, Celia M. Smith
KEYWORDS:
Irradiance, Migration Behavior, Ulva fasciata, Gamete, Spore
JOURNAL NAME:
Open Journal of Marine Science,
Vol.4 No.4,
October
30,
2014
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.