vestnik-bio-msuВестник Московского университета. Серия 16. БиологияVestnik Moskovskogo universiteta. Seriya 16. Biologiya0137-0952Lomonosov Moscow State University, School of Biology10.55959/MSU0137-0952-16-78-2-2vestnik-bio-msu-1230Research ArticleОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕRESEARCH ARTICLEАдаптация зеленых фотосинтезирующих бактерий к разной освещенности по данным спектроскопии хлоросомAdaptation of green photosynthetic bacteria to different illumination intensity according to spectroscopy data on chlorosomeshttps://orcid.org/0000-0003-0107-619XЯковлевА. Г.YakovlevA. G.

Яковлев Андрей Георгиевич – докт. физ.-мат. наук, ст. науч. сотр. отдела фотобиофизики. Тел.: 8-495-939-5363

119991, г. Москва, Ленинские горы, д. 1, стр. 40

1–40 Leninskie Gory, Moscow, 119991

yakov@belozersky.msu.ruТаисоваА. С.ТаisovaA. S.

Таисова Александра Семеновна – канд. биол. наук, ст.  науч. сотр. отдела фотосинтеза и флуоресцентных методов исследований. Тел.: 8-495-939-5413

119991, г. Москва, Ленинские горы, д. 1, стр. 40

1–40 Leninskie Gory, Moscow, 119991

taisova@belozersky.msu.ruФетисоваЗ. Г.FetisovaZ. G.

Фетисова Зоя Григорьевна – докт. физ.-мат. наук, гл. спец. отдела фотобиофизики. Тел.: 8-495-939-5363

119991, г. Москва, Ленинские горы, д. 1, стр. 40

1–40 Leninskie Gory, Moscow, 119991

zfetisova@belozersky.msu.ruНИИ физико-химической биологии имени А.Н. Белозерского; Московский государственный университет имени М.В. ЛомоносоваРоссияBelozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State UniversityRussian Federation2023090720237826469Copyright © Яковлев А.Г., Таисова А.С., Фетисова З.Г., 20232023Яковлев А.Г., Таисова А.С., Фетисова З.Г.Yakovlev A.G., Таisova A.S., Fetisova Z.G.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/1230

Исследовали спектры поглощения и кругового дихроизма хлоросом, выделенных из зеленых фотосинтезирующих бактерий Chloroflexus aurantiacus, выращенных при разной освещенности. Обнаружили, что по мере уменьшения этой освещенности спектры сдвигаются в красную сторону и становятся уже и больше по амплитуде. Выполнили теоретическое моделирование полученных данных с помощью теории экситонов. Пришли к выводу о том, что количество молекул бактериохлорофилла c в линейных цепях, составляющих основу элементарных блоков хлоросом, становится больше по мере уменьшения интенсивности света, при котором выращиваются бактерии. Предположили, что данное явление увеличивает эффективность улавливания слабых световых потоков и тем самым повышает шансы на выживание бактерий в условиях дефицита солнечного света.

The absorption and circular dichroism spectra of chlorosomes isolated from green photosynthetic bacteria Chloroflexus aurantiacus grown under different illumination were studied. It was found that as the intensity of the growth light decreases, the spectra shift to the red side and become narrower and larger in amplitude. Theoretical modeling of the data obtained was performed using the theory of excitons. The conclusion was formulated that the number of bacteriochlorophyll c molecules in linear chains, which form the basis of the elementary blocks of chlorosomes, become greater as the intensity of light at which bacteria are grown decreases. It was suggested that this phenomenon increases the efficiency of capturing weak light fluxes and thereby increases the chances of bacterial survival in conditions of sunlight deficiency.

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