Seasonal and ontogenetic changes of mycosporine-like amino acids in planktonic organisms from an alpine lake.
Seasonal and ontogenetic changes of mycosporine-like amino acids in planktonic organisms from an alpine lake.
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DOI：
10.4319/lo.2006.51.3.1530
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发表时间：
2006-05
影响因子：
4.5
通讯作者：
Sommaruga R
中科院分区：
文献类型：
--
作者：
Tartarotti B;Sommaruga R
在15个月的时间里，我们研究了高山湖泊浮游植物和桡足类浮游植物类真菌孢子素氨基酸(MAA)的定性和定量组成。在样品中鉴定出多达8个MAA，其中新诺林占主导地位。MAAS常年发生，表现出较强的季节性。与冰盖时期相比，夏季浮游植物和深水梭子藻的平均浓度分别高出3.6倍和3.0倍。夏季，浮游植物中MAAs的含量随深度的增加而降低，表明它们具有光保护作用。浮游植物中叶绿素a-MAAs浓度与入射太阳辐射和紫外线(UV)水透明度显著相关(R2≤0.36)，但与水温的相关性最强(R2=0.67)。在浮游动物中，在卵、无节幼体和幼年桡足类中发现了最高含量的MAAs，推测这可能为后代提供了高水平的光保护。桡足类中优势MAA的比例呈现季节性和个体发育的变化，这与浮游植物中优势MAA的相对变化一致，而与其他丰富的MAA的相对变化不一致。考虑到这些化合物的合成和随后积累之间大约1个月的时间滞后，桡足类晚期到成虫生活期的MAA浓度与浮游植物中的MAA浓度显著相关。在环境胁迫加剧期间，MAAs浓度较高的年度模式与这些化合物在保护水生生物免受紫外线损害方面发挥重要作用的观点一致。
We studied the quantitative and qualitative mycosporine-like amino acid (MAA) composition in phytoplankton and the copepod Cyclops abyssorum tatricus from an alpine lake over a 15-month period. Up to eight MAAs were identified in the samples, with shinorine being predominant. The MAAs occurred year round and showed a strong seasonal pattern. Compared with ice-cover periods, concentrations during the summer were on average 3.6 and 3.0 times higher in phytoplankton and C. abyssorum tatricus, respectively. During the summer, the contents of MAAs in phytoplankton decreased with depth, suggesting their photoprotective role. Chlorophyll a-specific concentrations of MAAs in phytoplankton correlated significantly with the incident solar radiation and ultraviolet (UV) water transparency (r2 ≤ 0.36), however, the strongest relationship was found with water temperature (r2 = 0.67). In zooplankton, highest contents of MAAs were found in eggs, nauplii, and young copepodids, presumably providing a high level of photoprotection for progeny. Proportions of the dominant MAAs in the copepod showed seasonal and ontogenetic variations, which were consistent with relative changes in the predominant MAA, but not other abundant MAAs, in phytoplankton. Considering a time lag of approximately 1 month between the synthesis and subsequent accumulation of these compounds, MAA concentrations in late copepodid to adult life stages were significantly correlated to those in phytoplankton. Annual patterns in MAAs with high concentrations during periods of elevated environmental stress are consistent with the idea that these compounds play an important role in protecting aquatic organisms against UV damage.
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影响因子：
2.4
作者：
Carroll, AK;Shick, JM
通讯作者：
Shick, JM
影响因子：
3.1
作者：
Goncalves, Rodrigo J.;Villafane, Virginia E.;Helbling, E. Walter
通讯作者：
Helbling, E. Walter
DOI：
10.1016/s0022-0981(00)00293-8
发表时间：
2000-12-01
影响因子：
2
作者：
Newman, SJ;Dunlap, WC;Ritz, D
通讯作者：
Ritz, D
DOI：
10.1016/0300-9629(79)90083-5
发表时间：
1979-01-01
影响因子：
2.3
作者：
HAIRSTON, NG
通讯作者：
HAIRSTON, NG
影响因子：
4.5
作者：
Moeller, RE;Gilroy, S;Sommaruga, R
通讯作者：
Sommaruga, R