Settlement and metamorphosis of Styela canopus Savigny larvae in response to some neurotransmitters and thyroxin  

作　　者：FENG Danqing HUANG Ying KE Caihuan ZHOU Shiqiang LI Shaojing 

机构地区：[1]Key State Laboratory of Marine Environmental Science,Xiamen University, Xiaman 361005, China [2]Department of Oceanography, Xiamen University, Xiamen 361005, China [3]Institute of Subtropic Oceanography, Xiamen University, Xiamen 361005, China

出　　处：《Acta Oceanologica Sinica》2006年第3期90-97,共8页海洋学报（英文版）

基　　金：This research was supported by the National Natural Science Foundation of China under contract Nos 40276041 and 49976034.

摘　　要：The larvae of ascidian Styela canopus Savigny were treated with epinephrine, norepinephrine, L-DOPA, GABA and thyroxin to test the ability of these compounds to induce or inhibit larval settlement and metamorphosis. The results showed that epinephrine, norepinephrine and L-DOPA at the concentration of 1 μmol/dm^3 induced larval settlement and metamorphosis in S. canopus, with short exposure （ 1 h） to 1 μmol/dm^3 of L-DOPA inducing rapid settlement. In contrast, GABA at the concentrations of 0.1 ～1130.0 μmol/dm^3 significantly inhibited the settlement and metamorphosis of S. canopus larvae. In addition, thyroxin at 1 -50 μg/dm^3 had no effect on larval settlement and metamorphosis in S. canopus. These results suggest the importance of neurotransmitters in the settlement and metamorphosis of S. canopus larvae.The larvae of ascidian Styela canopus Savigny were treated with epinephrine, norepinephrine, L-DOPA, GABA and thyroxin to test the ability of these compounds to induce or inhibit larval settlement and metamorphosis. The results showed that epinephrine, norepinephrine and L-DOPA at the concentration of 1 μmol/dm^3 induced larval settlement and metamorphosis in S. canopus, with short exposure （ 1 h） to 1 μmol/dm^3 of L-DOPA inducing rapid settlement. In contrast, GABA at the concentrations of 0.1 ～1130.0 μmol/dm^3 significantly inhibited the settlement and metamorphosis of S. canopus larvae. In addition, thyroxin at 1 -50 μg/dm^3 had no effect on larval settlement and metamorphosis in S. canopus. These results suggest the importance of neurotransmitters in the settlement and metamorphosis of S. canopus larvae.

关 键 词：Styela canopus LARVAE settlement METAMORPHOSIS NEUROTRANSMITTER THYROXIN 

分 类 号：Q17[生物学—水生生物学]