Stress due to low nitrate availability reduces the biochemical acclimation potential of the giant kelp Macrocystis pyrifera to high temperature

Stress due to low nitrate availability reduces the biochemical acclimation potential of the giant kelp Macrocystis pyrifera to high temperature
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硝酸盐利用率低造成的压力降低了巨藻巨囊藻对高温的生化适应潜力

DOI:
10.1016/j.algal.2020.101895
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发表时间:
2020
影响因子:
5.1
通讯作者:
C.L. Hurd
C.L. Hurd
中科院分区:
生物学3区
文献类型:
--
作者:
M. Schmid;P.A. Fernández;J.D. Gaitán-Espitia;P. Virtue;P.P. Leal;A.T. Revill;P.D. Nichols;C.L. Hurd

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大型藻类的性能和生存在很大程度上取决于它们适应不同环境条件的能力。在这项研究中,我们研究了巨型海带Macrocystis pyriferato在不同温度(6,17和24 °C)和低和高硝酸盐条件(5 μM和80 μM硝酸盐)下对脂质和脂肪酸水平的短期反应。结果表明,在低硝酸盐和高硝酸盐条件下,通过改变脂肪酸组成的饱和度,梨状微囊藻能够迅速适应不同的温度。在脂质水平上,我们观察到温度和营养条件的相互作用。在高硝酸盐条件下,毒死蜱保持相同的脂质分布。然而,在低硝酸盐和高温条件下,观察到游离脂肪酸(FFA)的增加,表明在高温下的脂质变性。结果表明,低氮浓度可以放大短期温度胁迫对巨藻的负面影响。我们的研究结果表明,在快速变暖事件,当地硝酸盐的可用性可能是一个决定性因素的驯化潜力ofM.pyfera。
The performance and survival of macroalgae is largely determined by their ability to adjust to varying environmental conditions. In this study, we investigated the short-term response of the giant kelpMacrocystis pyriferato varying temperatures (6, 17 and 24 °C) and low and high nitrate conditions (5 μM and 80 μM nitrate) on lipid and fatty acid levels. Results revealed thatM.pyriferawas able to rapidly adjust to varying temperatures by changing the saturation level of the fatty acid composition at low and high nitrate conditions. On a lipid level, we observed interactive effects of temperature and nutrient conditions. Under high nitrate conditions,M.pyriferamaintained the same lipid profile. However, under low nitrate and high temperature conditions, an increase in free fatty acids (FFA) was observed, indicative of lipid degeneration at high temperatures. Results show that low nitrogen concentrations can magnify the negative effects of short term temperature stress in the giant kelpM.pyrifera. Our findings indicate that under rapid warming events, local nitrate availability might be a decisive factor for the acclimation potential ofM.pyrifera.
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