CAJ | 학술논문

通过比较不同温度和光照强度对浒苔（Ulva prolifera）孢子／配子放散和萌发的影响，来探究适合浒苔孢子／配子放散和萌发的温度和光照强度。实验结果表明，适宜浒苔孢子／配子放散的温度和光照强度范围分别为20～30℃和180～300μmol·m－2·s－1。在温度25℃、光照强度240μmol·m－2·s－1时，浒苔孢子／配子的放散量最大。浒苔孢子／配子萌发的适宜温度和光照强度分别为15～25℃和40～160μmol·m－2·s－1，最适温度和光照强度分别为20℃和120μmol·m－2·s－1。本实验揭示了黄海绿潮优势种浒苔繁殖与生长的环境响应过程，为进一步探索黄海绿潮暴发机制提供理论依据。
통과비교불동온도화광조강도대호태（Ulva prolifera）포자／배자방산화맹발적영향，래탐구괄합호태포자／배자방산화맹발적온도화광조강도。실험결과표명，괄의호태포자／배자방산적온도화광조강도범위분별위20～30℃화180～300μmol·m－2·s－1。재온도25℃、광조강도240μmol·m－2·s－1시，호태포자／배자적방산량최대。호태포자／배자맹발적괄의온도화광조강도분별위15～25℃화40～160μmol·m－2·s－1，최괄온도화광조강도분별위20℃화120μmol·m－2·s－1。본실험게시료황해록조우세충호태번식여생장적배경향응과정，위진일보탐색황해록조폭발궤제제공이론의거。
Massive green tide has occurred every year in the coast of the Yellow Sea since 2007 ,seriously damaging the ecological environment and becoming a sustained marine environmental disaster.The dominant species of the floating green tide in the Yellow Sea was identified as U.prolifera.Floating thalli of Ulva prolifera samples were collected from Rudong coast,Jiangsu Province. <br> Firstly,for the release of U.prolifera spores/gametes investigations,five temperature treatments (15,20, 25,30,35 ℃),five light intensity treatments(0,60,120,180,240,300 μmol·m-2 ·s-1 )and all materials were subjected to a 12L∶12D photoperiod throughout the experiment.In the second experiment,to study the response of the germination of U.prolifera spores/gametes to temperature and light intensity,six temperature treatments (10,15,20,25,30,35 ℃)under 60 μmol·m-2 ·s-1,six light intensity treatments (0,40,80,120,160,200μmol·m-2·s-1)under 20℃and all materials were subjected to a 12L∶12D photoperiod throughout the experiment. <br> The results showed that the suitable temperature and light intensity for the release of U.prolifera spores/gametes were 20-30 ℃ and 180 -300 μmol·m-2 ·s-1 ,respectively.The maximum released amount of U.prolifera spores/gametes was observed at 25 ℃and 240 μmol·m-2 ·s-1 .However,the released amount of gametophyte blade was significantly higher than that of sporophyte blade (P<0.05 ).Under the condition of 25 ℃and 240 μmol · m-2 · s-1 ,the released amount of U.prolifera sporophyte blade was 2.8 ×107 individuals whereas that of the U.prolifera gametophyte blade was 5.2 ×107 individuals,which was twice as much as that of the sporophyte blade.The suitable temperature and light intensity for the germination of U. prolifera spores/gametes were at 15 -25 ℃ and 40 -160 μmol·m-2 ·s-1 and the optimum values were found to be 20 ℃ and 120 μmol·m-2 ·s-1 .Under the condition of 60 μmol·m-2 ·s-1 ,the germination rate of U.prolifera spores and gametes at 20 ℃ were approximately 88.3% and 77.8% respectively,which were much higher than that of other temperature levels (P<0.05).The significantly lower germination rates were observed at higher temperature and no germination was found at 35 ℃.Under the condition of 20 ℃, the germination rate of U.prolifera spores and gametes at 120 μmol·m-2 ·s-1 were approximately 86.5%and 88.1% respectively,which were much higher than that of other light intensity levels (P<0.05 ).The significantly lower germination rates were observed at lower light intensity and no germination was found in dark condition. <br> This study carried out a detailed investigation on the response of the release and germination of U. prolifera spores/gametes on temperature and light intensity,which would be helpful to study the blooming mechanism of green tide.