Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light

IF 5.1 2区地球科学 Q1 LIMNOLOGY

Limnology and Oceanography Letters Pub Date : 2024-09-28 DOI:10.1002/lol2.10441

Xin Zhang, William G. Sunda, Haizheng Hong, Dalin Shi

{"title":"Extreme plasticity in the photosystem composition of a low‐light Prochlorococcus ecotype in response to iron and light","authors":"Xin Zhang, William G. Sunda, Haizheng Hong, Dalin Shi","doi":"10.1002/lol2.10441","DOIUrl":null,"url":null,"abstract":"Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the optimal light range for growth of a marine cyanobacterium, Prochlorococcus strain NATL1A, a member of LLI ecotype, under Fe limitation. The response of the cells to variations in Fe and light involved differential changes in the cellular content of low‐Fe photosystem II (PSII) and Fe‐rich photosystem I (PSI), and associated up to 23‐fold changes in PSII : PSI ratios, showing an unprecedented extreme plasticity of the photosynthetic apparatus. Our study demonstrated the physiological effects of Fe and light interactions on this low‐light‐adapted Prochlorococcus strain, and increases our understanding of the reasons for the wide distribution of this and possibly other Prochlorococcus strains in the ocean.","PeriodicalId":18128,"journal":{"name":"Limnology and Oceanography Letters","volume":null,"pages":null},"PeriodicalIF":5.1000,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Limnology and Oceanography Letters","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1002/lol2.10441","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"LIMNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Light affects the cellular iron (Fe) requirement of phytoplankton because of its presence in major photosynthetic proteins. Thus, interactions between variable Fe concentrations and light intensities could restrict photosynthetic carbon fixation in the ocean. Here we show a narrowing of the optimal light range for growth of a marine cyanobacterium, Prochlorococcus strain NATL1A, a member of LLI ecotype, under Fe limitation. The response of the cells to variations in Fe and light involved differential changes in the cellular content of low‐Fe photosystem II (PSII) and Fe‐rich photosystem I (PSI), and associated up to 23‐fold changes in PSII : PSI ratios, showing an unprecedented extreme plasticity of the photosynthetic apparatus. Our study demonstrated the physiological effects of Fe and light interactions on this low‐light‐adapted Prochlorococcus strain, and increases our understanding of the reasons for the wide distribution of this and possibly other Prochlorococcus strains in the ocean.

查看原文本刊更多论文

低光照 Prochlorococcus 生态型光系统结构对铁和光照的极端可塑性反应

由于浮游植物的主要光合作用蛋白质中含有铁（Fe），因此光照会影响浮游植物细胞对铁（Fe）的需求。因此，不同的铁浓度和光照强度之间的相互作用可能会限制海洋中的光合碳固定。在此，我们展示了一种海洋蓝藻--LLI 生态型的 Prochlorococcus 菌株 NATL1A--在铁限制条件下生长的最佳光照范围的缩小。细胞对铁和光照变化的反应涉及低铁光合系统 II（PSII）和富铁光合系统 I（PSI）细胞含量的不同变化，以及相关的 PSII : PSI 比率高达 23 倍的变化，显示了光合装置前所未有的极端可塑性。我们的研究证明了铁与光相互作用对这种适应低光的原绿球藻菌株的生理影响，并加深了我们对这种菌株及其他可能的原绿球藻菌株在海洋中广泛分布的原因的了解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Limnology and Oceanography Letters Multiple-

CiteScore

10.00

自引率

3.80%

发文量

审稿时长

25 weeks

期刊介绍： Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.