vestnik-bio-msuВестник Московского университета. Серия 16. БиологияVestnik Moskovskogo universiteta. Seriya 16. Biologiya0137-0952Lomonosov Moscow State University, School of Biology10.55959/MSU0137-0952-16-79-4-2vestnik-bio-msu-1445Research ArticleКРАТКИЕ СООБЩЕНИЯSHORT COMMUNICATIONSНекоторые физико-химические характеристики мареннин-подобного пигмента, синтезируемого морской диатомовой водорослью Haslea karadagensis (Bacillariophyta)Some physico-chemical characteristics of the marennine-like pigment synthesized by the marine diatom Haslea karadagensis (Bacillariophyta)https://orcid.org/0000-0002-3510-0453ДавидовичН. А.DavidovichN. A.

Давидович Николай Александрович – докт. биол. наук, зав. лабораторией водорослей и микробиоты

298188, Республика Крым, г. Феодосия, Курортное, ул. Науки, д. 24, Тел.: 8-365-622-62-12 

24 Nauki st., Kurortnoye, Feodosia, Republic of Crimea, 298188 

nickolaid@yandex.ruhttps://orcid.org/0009-0002-4110-8424КириенкоЕ. С.KirienkoE. S.

Кириенко Екатерина Сергеевна – инженер лаборатории водорослей и микробиоты  

298188, Республика Крым, г. Феодосия, Курортное, ул. Науки, д. 24, Тел.: 8-365-622-62-12 

24 Nauki st., Kurortnoye, Feodosia, Republic of Crimea, 298188 

esk-00@bk.ruКарадагская научная станция имени Т.И. Вяземского – природный заповедник Российской академии наук, филиал Федерального государственного бюджетного учреждения науки Федерального исследовательского центра «Институт биологии южный морей имени А.О. Ковалевского РАН»РоссияT.I. Vyazemsky Karadag Scientific Station – Nature reserve of RAS – Branch of A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of SciencesRussian Federation202403032025794360366Copyright © Давидович Н.А., Кириенко Е.С., 20252025Давидович Н.А., Кириенко Е.С.Davidovich N.A., Kirienko E.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik-bio-msu.elpub.ru/jour/article/view/1445

Мареннин и мареннин-подобные пигменты, продуцируемые некоторыми представителями диатомовых водорослей рода Haslea, представляют собой уникальные водорастворимые соединения, обладающие рядом ценных свойств. Химическая структура пигментов этой группы до сих пор не раскрыта. Данные о физико-химических характеристиках мареннина получены преимущественно для одного вида – H. ostrearia. За последние полтора десятилетия описаны четыре новых мареннин-продуцирующих вида, что открывает перспективу изучения биоразнообразия рода Haslea и соответственно разнообразия мареннинов. Мареннин-продуцирующие представители диатомовых рода Haslea накапливают пигмент в апикальных концах клеток, а также выделяют его во внешнюю среду, благодаря чему она приобретает зеленовато-синий цвет. Роль мареннина в функционировании клеток диатомовых неизвестна, но можно допустить, что пигмент, не участвующий в фотосинтезе и поглощающий свет преимущественно в ультрафиолетовой, фиолетовой и красной областях, является фотопротектором. Химический состав и спектральные характеристики мареннинов, продуцируемых разными видами Haslea, слегка различаются. В то время как у некоторых видов, особенно у H. ostrearia, физико-химические свойства мареннина описаны достаточно обстоятельно, пигмент H. karadagensis – эндемика Черного моря – остается практически неисследованным. В работе представлены в сравнении характерные для заданных условий спектрофотометрические и физико-химические показатели мареннинов H. karadagensis и H. ostrearia. Определены значения кажущихся констант диссоциации и изобестических точек для мареннинов обеих диатомей.

Marennine and marennine-like pigments produced by certain diatom species of the genus Haslea are unique water-soluble compounds with several valuable properties. The exact chemical structure of these pigments has not been fully elucidated, but data on the physical and chemical characteristics of marennines have been obtained primarily for H. ostrearia. Over the past fifteen years, four additional species producing marennine have been identified, which opens up the opportunity to explore the diversity within the genus Haslea and, consequently, the diversity of marennines. Diatom representatives of the genus Haslea, that produce marennine, accumulate pigment at the apices of their cells and release it into the external environment, giving the surrounding water a greenish-blue color. Although the exact role of marennine in diatom cellular function is unknown, it is believed to act as a photoprotectant, absorbing light in the ultraviolet (UV), violet, and red wavelengths, as it does not participate in photosynthesis. The chemical composition and spectral properties of marennines produced by different Haslea species vary slightly, although the physical and chemical characteristics of marennine from H. ostrearia have been extensively studied. While the physicochemical properties of marennine in some species, particularly H. ostrearia, have been described in detail, the pigment in H. karadagensis, an endemic species of the Black Sea region, remains largely unexplored. The study presents a comparison of the spectrophotometric and physicochemical characteristics of marennine from H. karadagensis and H. ostrearia under given conditions. The apparent dissociation constants and isobestic points of marennine from both diatom species were determined.

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The authors declare that there are no conflicts of interest present.