Growth and reproduction of Scytosiphon lomentaria (Fucophyceae) in relation to temperature in two populations from Denmark
Growth and reproduction of Scytosiphon lomentaria (Fucophyceae) in relation to temperature in two populations from Denmark
复制标题
丹麦两个种群中褐藻纲藻类（褐藻纲）的生长和繁殖与温度的关系
DOI：
10.1111/j.1756-1051.1991.tb01417.x
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发表时间：
1991
影响因子：
0.9
通讯作者：
L. Moseholm
中科院分区：
文献类型：
--
作者：
Aase Kristiansen;P. M. Pedersen;L. Moseholm
来自丹麦的两个菌株在温度梯度板上长时间生长。来自日德兰半岛西北部的材料（品系46号）有一个减少的匍匐系统（一个少数细胞的肿块），而来自Sound的其他材料（品系46号）。S41)地壳发育良好。这种差异在生长和繁殖模式中起着重要作用。菌株46迅速产生大量圆柱形大菌体。在四周的实验期内，大肠体上的多眼孢子囊形成蜂群，在18.2°C下最大干重为32.9 mg。
Two strains of Scytosiphon lomentaria from Denmark have been grown under long-day conditions on a temperature-gradient plate. The material from north-west Jutland (strain No. 46) has a reduced prostrate system (a few-celled lump) whereas the other material from the Sound (strain No. S41) has a well-developed crust. This difference plays a significant role in growth and reproductive patterns. Strain No. 46 rapidly produces a great number of cylindrical macrothalli. Within a four-week experimental period, formation of swarmers from plurilocular sporangia on the macrothalli takes place and results in a maximum dry weight of 32.9 mg at 18.2°C.
Swarmers from the macrothalli of strain S41 always develop into knot-filamentous or crust-shaped thalli. The development of the macrothalli, therefore, takes a longer time than in strain 46 and the maximum dry weight is only 16.5 mg at 16°C even within an experimental period of six weeks. The reproductive pattern is more complex than in strain 46. The crusts produce unilocular sporangia at temperatures between 16°C and 23.8°C, and function, therefore, as the reproductive system during the summer as macrothalli disappear at temperatures above 18°C both in nature and in culture. Formation of plurilocular sporangia on macrothalli starts when they are from 6–9 weeks old at temperatures between 11°C and 18°C.
The temperature range for growth in the two strains also differs: Strain 46 grows from 7.3–24.4°C while strain S41 grows at least from 4–5.1°C to an upper limit of 27.1°C, but lower limit has not been determined precisely in the present experiment. These results indicate that temperature ecotypes exist, even within a limited geographic area.