{"title":"隐花植物太平洋半知母(Hemiselmis pacifica)通过藻体脂蛋白光谱吸收的变化实现互补色度适应","authors":"Ian D. Jin, Tammi L. Richardson","doi":"10.3354/ame02010","DOIUrl":null,"url":null,"abstract":"ABSTRACT: Cryptophytes are eukaryotic microalgae found in a variety of aquatic environments, from tea-colored ponds and lakes to the blue-water open ocean. To broaden the range of their spectral absorption beyond the limits of chlorophyll <i>a</i>, cryptophytes contain phycobiliprotein (PBP) accessory pigments. <i>Hemiselmis pacifica</i> contains the PBP cryptophyte-phycocyanin 577 (Cr-PC 577), which allows it to absorb green to orange wavelengths of light. Here, we characterized variability in PBP absorbance and growth rates of <i>H. pacifica</i> when this species was grown in nutrient-rich environments of differing spectral quality but equal light intensity. Two weeks after a shift from white to green light, <i>H. pacifica</i> altered the absorbance of its Cr-PC 577 to increase capture of green photons. Further, these complementary shifts were reversible when cultures were returned to the white-light environment, and the timescale of the reversal was faster than the original shift (~1 wk). Growth rates of <i>H. pacifica</i> in green light (0.25 d<sup>-1</sup>) were lower than in white-light controls (0.32 d<sup>-1</sup>), but not significantly different from cells grown in red light (0.27 d<sup>-1</sup>). The ability to adjust quickly to changes in light quality may confer an ecological advantage to cryptophytes when their environment is affected by processes such as eutrophication, deforestation/afforestation, or browning.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"33 1","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Complementary chromatic acclimation by shifts in phycobiliprotein spectral absorption in the cryptophyte Hemiselmis pacifica\",\"authors\":\"Ian D. Jin, Tammi L. Richardson\",\"doi\":\"10.3354/ame02010\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"ABSTRACT: Cryptophytes are eukaryotic microalgae found in a variety of aquatic environments, from tea-colored ponds and lakes to the blue-water open ocean. To broaden the range of their spectral absorption beyond the limits of chlorophyll <i>a</i>, cryptophytes contain phycobiliprotein (PBP) accessory pigments. <i>Hemiselmis pacifica</i> contains the PBP cryptophyte-phycocyanin 577 (Cr-PC 577), which allows it to absorb green to orange wavelengths of light. Here, we characterized variability in PBP absorbance and growth rates of <i>H. pacifica</i> when this species was grown in nutrient-rich environments of differing spectral quality but equal light intensity. Two weeks after a shift from white to green light, <i>H. pacifica</i> altered the absorbance of its Cr-PC 577 to increase capture of green photons. Further, these complementary shifts were reversible when cultures were returned to the white-light environment, and the timescale of the reversal was faster than the original shift (~1 wk). Growth rates of <i>H. pacifica</i> in green light (0.25 d<sup>-1</sup>) were lower than in white-light controls (0.32 d<sup>-1</sup>), but not significantly different from cells grown in red light (0.27 d<sup>-1</sup>). The ability to adjust quickly to changes in light quality may confer an ecological advantage to cryptophytes when their environment is affected by processes such as eutrophication, deforestation/afforestation, or browning.\",\"PeriodicalId\":8112,\"journal\":{\"name\":\"Aquatic Microbial Ecology\",\"volume\":\"33 1\",\"pages\":\"\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2024-09-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Aquatic Microbial Ecology\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.3354/ame02010\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Aquatic Microbial Ecology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.3354/ame02010","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ECOLOGY","Score":null,"Total":0}
Complementary chromatic acclimation by shifts in phycobiliprotein spectral absorption in the cryptophyte Hemiselmis pacifica
ABSTRACT: Cryptophytes are eukaryotic microalgae found in a variety of aquatic environments, from tea-colored ponds and lakes to the blue-water open ocean. To broaden the range of their spectral absorption beyond the limits of chlorophyll a, cryptophytes contain phycobiliprotein (PBP) accessory pigments. Hemiselmis pacifica contains the PBP cryptophyte-phycocyanin 577 (Cr-PC 577), which allows it to absorb green to orange wavelengths of light. Here, we characterized variability in PBP absorbance and growth rates of H. pacifica when this species was grown in nutrient-rich environments of differing spectral quality but equal light intensity. Two weeks after a shift from white to green light, H. pacifica altered the absorbance of its Cr-PC 577 to increase capture of green photons. Further, these complementary shifts were reversible when cultures were returned to the white-light environment, and the timescale of the reversal was faster than the original shift (~1 wk). Growth rates of H. pacifica in green light (0.25 d-1) were lower than in white-light controls (0.32 d-1), but not significantly different from cells grown in red light (0.27 d-1). The ability to adjust quickly to changes in light quality may confer an ecological advantage to cryptophytes when their environment is affected by processes such as eutrophication, deforestation/afforestation, or browning.
期刊介绍:
AME is international and interdisciplinary. It presents rigorously refereed and carefully selected Research Articles, Reviews and Notes, as well as Comments/Reply Comments (for details see AME 27:209), Opinion Pieces (previously called ''As I See It'') and AME Specials. For details consult the Guidelines for Authors. Papers may be concerned with:
Tolerances and responses of microorganisms to variations in abiotic and biotic components of their environment; microbial life under extreme environmental conditions (climate, temperature, pressure, osmolarity, redox, etc.).
Role of aquatic microorganisms in the production, transformation and decomposition of organic matter; flow patterns of energy and matter as these pass through microorganisms; population dynamics; trophic interrelationships; modelling, both theoretical and via computer simulation, of individual microorganisms and microbial populations; biodiversity.
Absorption and transformation of inorganic material; synthesis and transformation of organic material (autotrophic and heterotrophic); non-genetic and genetic adaptation; behaviour; molecular microbial ecology; symbioses.