Effects of photoperiod on the development of the central glutamate system in tilapia, Oreochromis mossambicus.
The effect of photoperiod (light/dark cycle) on the development of the central glutamate system was investigated in tilapia, Oreochromis mossambicus. Tilapia, at 0, 5, and 10 days posthatching were respectively divided into three equal groups to be kept in different photoperiods: 12/12 h, 24/0 h (full day), and 0/24 h (full night). Neither the full-day nor the full-night photoperiod showed any influence on the development of the central glutamate system, including glutamate content and mRNA expression of glutamate receptor 3 alpha, in the developing tilapia brain. These results suggest that neither constant light nor dark photoperiods affected the influence of the central glutamate system on brain sex differentiation in tilapia during the early developing period.
National Museum of Marine Biology and Aquarium, 2 Houwan Road, Checheng, Pingtung 944, Taiwan.
Li-Hsueh
LH
Wang
Ching-Lin
CL
Tsai
D000818:Animals; D001921:Brain / Q000254:growth & development*; D018698:Glutamic Acid / Q000378:metabolism*; D017440:Photoperiod; D012333:RNA, Messenger / Q000032:analysis; D018091:Receptors, AMPA; D017470:Receptors, Glutamate / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012733:Sex Differentiation / Q000502:physiology*; D017210:Tilapia
D012333:RNA, Messenger; D018091:Receptors, AMPA; D017470:Receptors, Glutamate; C104723:glutamate receptor ionotropic, AMPA 3; D018698:Glutamic Acid