EFFECTS OF ULTRAVIOLET-A RADIATION AND NUTRIENT AVAILABILITY ON THE CELLULAR COMPOSITION OF PHOTOPROTECTIVE COMPOUNDS IN GLENODINIUM FOLIACEUM (DINOPHYCEAE)(1).
EFFECTS OF ULTRAVIOLET-A RADIATION AND NUTRIENT AVAILABILITY ON THE CELLULAR COMPOSITION OF PHOTOPROTECTIVE COMPOUNDS IN GLENODINIUM FOLIACEUM (DINOPHYCEAE)(1).
复制标题
紫外线-A 辐射和养分有效性对Glenodenium foliaceum（甲藻纲）中光保护化合物细胞组成的影响(1)。
DOI：
10.1111/j.1529-8817.2011.01046.x
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发表时间：
2011
影响因子：
2.9
通讯作者：
White DA
中科院分区：
文献类型：
--
作者：
White DA
甲藻Glenodinium foliaceum F.研究了Stein暴露于紫外线A（UVA）辐射（320-400 nm; 1.7 W·m2）以及硝酸盐和磷酸盐可用性对该响应的影响。 在对照（PAR）和实验（PAR + UVA）培养物中，在14天生长期内测量的参数包括细胞类菌孢素氨基酸（MAA）、叶绿素、类胡萝卜素和培养物生长速率。虽然UVA对生长速率没有显著影响，但与对照培养物（分别为3± 1 pg·cell−1、13.3 ± 3.2 pg·cell− 1和7.4 ± 0.3 pg·cell−1）相比，MAA化合物（28 ± 2 pg· cell−1）显著诱导，chla（9.6 ± 0.1 pg·cell−1）和岩藻黄素（4.4 ± 0.1pg·cell−1）减少。 在第二项研究中，当限制硝酸盐时，UVA暴露培养物中的MAA浓度较低（P<0.05），但当限制磷酸盐时，MAA浓度较高。硝酸盐限制导致细胞内叶绿素含量显著降低（P<0.05），但对其他色素无影响。磷酸盐可用性对最终色素浓度没有影响。结果表明，营养的有效性显着影响细胞积累的光保护化合物在G。叶片暴露于UVA。
The photoprotective response in the dinoflagellateGlenodinium foliaceumF. Stein exposed to ultraviolet‐A (UVA) radiation (320–400 nm; 1.7 W · m2) and the effect of nitrate and phosphate availability on that response have been studied. Parameters measured over a 14 d growth period in control (PAR) and experimental (PAR + UVA) cultures included cellular mycosporine‐like amino acids (MAAs), chls, carotenoids, and culture growth rates. Although there were no significant effects of UVA on growth rate, there was significant induction of MAA compounds (28 ± 2 pg · cell−1) and a reduction in chla(9.6 ± 0.1 pg · cell−1) and fucoxanthin (4.4 ± 0.1 pg · cell−1) compared to the control cultures (3 ± 1 pg · cell−1, 13.3 ± 3.2 pg · cell−1, and 7.4 ± 0.3 pg · cell−1, respectively). In a second investigation, MAA concentrations in UVA‐exposed cultures were lower when nitrate was limited (P<0.05) but were higher when phosphate was limiting. Nitrate limitation led to significant decreases (P<0.05) in cellular concentration of chls (chlc1, chlc2, and chla), but other pigments were not affected. Phosphate availability had no effect on final pigment concentrations. Results suggest that nutrient availability significantly affects cellular accumulation of photoprotective compounds inG. foliaceumexposed to UVA.