High tolerance to fluctuating salinity allows Sargassum thunbergii germlings to survive and grow in artificial habitat of full immersion inE intertidal zone
High tolerance to fluctuating salinity allows Sargassum thunbergii germlings to survive and grow in artificial habitat of full immersion inE intertidal zone
复制标题
对盐度波动的高耐受性使马尾藻幼体能够在完全浸没在潮间带的人工栖息地中生存和生长
DOI：
10.1016/j.jembe.2011.10.025
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发表时间：
2012-01-31
影响因子：
2
通讯作者：
Yu, Yong Qiang
中科院分区：
文献类型：
--
作者：
Chu, Shao Hua;Zhang, Quan Sheng;Yu, Yong Qiang
本研究采用四因素试验设计（3种温度、4种盐度、2种频率和3种渗透胁迫持续时间），研究了鼠尾藻（Sargassum thunberthums）可育体释放后的幼苗对渗透胁迫的耐受性。结果表明，盐度和渗透胁迫时间对幼苗的生长和存活有显著影响，而渗透频率对幼苗的生长和存活影响不大。除主效应外，四种胁迫间的双向、三向和四向交互作用对生长的影响均显著。当在32 psu和30 ℃组合培养时，幼苗表现出快速生长，相对生长率（RGR，% d（-1））超过16%。尽管低渗和高渗条件下的幼苗生长受到显著抑制，但除35 ℃下的RGRs低于10%外，均获得了超过12%的RGRs。与生长相比，存活对渗透胁迫的耐受性更强。当暴露于大多数渗透胁迫时，幼苗表现出超过60%的高存活率，到实验结束时，只有在极端条件下（12 psu，在35 ℃下4 h或8h），存活率降低到低于10%。虽然渗透胁迫对幼苗的生长和存活有显著影响，但在大多数条件下，幼苗生长迅速，存活率高。而那些对幼苗有很大破坏作用的极端条件在田间几乎不存在。因此，人工水池的建设是可行的恢复S。在潮间带的雷贝层。(c)2011爱思唯尔有限公司版权所有。
In this study, a four-way factorial experimental design (three temperatures, four salinities, two frequencies and three durations of osmotic stress) was used to test the tolerance of Sargassum thunbergii germlings shortly released from fertile thalli to osmotic stress. Results showed that the growth and survival of germlings were significantly affected by salinity and duration of osmotic stress, rather than by osmotic frequency. In addition to the main effects, all two-way, three-way and four-way interactions between the four stresses on the growth were significant. Germlings showed quick growth with relative growth rate (RGR, % day(-1)) over 16% when cultured at 32 psu combined with 30 degrees C. Although growths of germlings subjected to hypo-osmotic and hyper-osmotic conditions were significantly inhibited, RGRs over 12% were obtained except for those at 35 degrees C with the RGRs below 10%. In comparison to growth, survival was more tolerant to osmotic stress. Germlings showed high survivals over 60% when exposed to most osmotic stresses, by the end of experiment Only under extreme conditions (12 psu for 4 h or 8 h at 35 degrees C) were the survivals reduced to below 10%. Although the effects of osmotic stress on the growth and survival were significant, germlings exhibited quick growth and high survival under most conditions. And those extreme conditions which had great destructive effect on germlings barely exist in field. Therefore, the construction of artificial tanks is feasible for the restoration of S. thunbergii beds in the intertidal zone. (c) 2011 Elsevier B.V. All rights reserved.