Supporting information for the article “Spectral properties of marennine-like pigments reveal minor differences between blue Haslea species and strains”

Marennine is a bluish pigment excreted in the seawater by the microalga Haslea Ostrearia. It has interested researchers of different backgrounds such as marine biologists, phytochemists and biochemists because it fixes on the oysters gills and make them green, a phenomenon observed since centuries in the Atlantic French coast near Marenne-Oléron, where the tradition of cultivating oysters is old. Its biological activities have been and are currently studied and many applications are interesting because of its antioxidant, antiangiogenetic and antibacterial activities but also for being a blue natural pigment. During recent sampling campaigns all over the word, new blue diatoms have been discovered and ongoing investigation of genome and frustules appearance are carried out to classify them. A preliminary characterization of the marennine-like pigments that they produce has been carried out, and selected data concerning UV-visible spectrometry, Infrared spectrometry, cyclic voltammetry, elemental composition by Energy-dispersive X-ray spectroscopy (EDX), and proton nuclear magnetic resonance are presented and discussed in the research paper related to this supporting information. Therefore, the data presented in this data paper complete the full paper.马雷宁（Marennine）是由微藻（Haslea Ostrearia）排泄至海水中的蓝色色素。该色素可附着于牡蛎鳃部使其体表呈现绿色，这一现象早在数百年前便在法国大西洋沿岸的马雷讷-奥莱龙（Marenne-Oléron）地区被观测到，当地拥有悠久的牡蛎养殖传统，因此吸引了海洋生物学家、植物化学家、生物化学家等多领域研究者的关注。马雷宁的生物活性长期以来至今仍被广泛研究，其兼具抗氧化、抗血管生成、抗菌活性，同时作为天然蓝色色素具备独特应用价值，诸多潜在应用方向备受关注。近年来的全球采样工作中，科研人员发现了全新的蓝色硅藻类群，目前正对其基因组与硅质壳体形态展开研究以完成分类学鉴定。研究团队已对这些硅藻所产的类马雷宁色素开展了初步表征，与本支撑信息关联的研究论文中，已展示并讨论了紫外-可见分光光度法、红外光谱法、循环伏安法数据，以及基于能量色散X射线光谱（Energy-dispersive X-ray spectroscopy, EDX）的元素组成分析结果与质子核磁共振波谱数据。因此，本数据集论文所呈现的数据完整补充了前述研究论文的全部内容。