Increasing Temperature Counteracts the Negative Effect of UV Radiation on Growth and Photosynthetic Efficiency of Microcystis aeruginosa and Raphidiopsis raciborskii.


:High temperature can promote cyanobacterial blooms, whereas ultraviolet radiation (UVR) can potentially depress cyanobacterial growth by damaging their photosynthetic apparatus. Although the damaging effect of UVR has been well documented, reports on the interactive effects of UV radiation exposure and warming on cyanobacteria remain scarce. To better understand the combined effects of temperature and UVR on cyanobacteria, two strains of nuisance species, Microcystis aeruginosa (MIRF) and Raphidiopsis raciborskii (formerly Cylindrospermopsis raciborskii, CYRF), were grown at 24°C and 28°C and were daily exposed to UVA + UVB (PAR + UVA+UVB) or only UVA (PAR + UVA) radiation. MIRF and CYRF growth rates were most affected by PAR + UVA+UVB treatment and to a lesser extent by the PAR + UVA treatment. Negative UVR effects on growth, Photosystem II (PSII) efficiency and photosynthesis were pronounced at 24°C when compared to that at 28°C. Our results showed a cumulative negative effect on PSII efficiency in MIRF, but not in CYRF. Hence, although higher temperature ameliorates UVR damage, interspecific differences may lead to deviating impacts on different species, and combined elevated temperature and UVR stress could influence species competition.


Photochem Photobiol


Noyma NP,Mesquita MCB,Roland F,Marinho MM,Huszar VLM,Lürling M




Has Abstract


2021-01-04 00:00:00






  • Is phototherapy safe for HIV-infected individuals?

    abstract::Patients infected with human immunodeficiency virus (HIV) have a high prevalence of UV radiation-responsive skin diseases including psoriasis, pruritus, eosinophilic folliculitis and eczemas. On the other hand, UV has been shown to suppress T cell-mediated immune responses and to induce activation and replication of H...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章,评审


    authors: Adams ML,Houpt KR,Cruz PD Jr

    更新日期:1996-08-01 00:00:00

  • Therapeutic Enhancement of Verteporfin-mediated Photodynamic Therapy by mTOR Inhibitors.

    abstract::Photodynamic therapy (PDT) with photosensitizer verteporfin is a clinically approved vascular disrupting modality that is currently in clinical trial for cancer treatment. In this study, we evaluated PDT in combination with either mTORC1 inhibitor rapamycin or mTORC1/C2 dual inhibitor AZD2014 for therapeutic enhanceme...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Kraus D,Palasuberniam P,Chen B

    更新日期:2020-03-01 00:00:00

  • The influence of ultraviolet-B radiation on growth, hydroxycinnamic acids and flavonoids of Deschampsia antarctica during Springtime ozone depletion in Antarctica.

    abstract::We examined the influence of solar ultraviolet-B radiation (UV-B; 280-320 nm) on the growth, biomass production and phenylpropanoid concentrations of Deschampsia antarctica during the springtime ozone depletion season at Palmer Station, along the Antarctic Peninsula. Treatments involved placing filters on frames over ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Ruhland CT,Xiong FS,Clark WD,Day TA

    更新日期:2005-09-01 00:00:00

  • Water and carboxyl group environments in the dehydration blueshift of bacteriorhodopsin.

    abstract::The proton channels of the bacteriorhodopsin (BR) proton pump contain bound water molecules. The channels connect the purple membrane surfaces with the protonated retinal Schiff base at the membrane center. Films of purple membrane equilibrated at low relative humidity display a shift of the 570 nm retinal absorbance ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Renthal R,Gracia N,Regalado R

    更新日期:2000-11-01 00:00:00

  • Quantum mechanical/molecular mechanical studies on spectral tuning mechanisms of visual pigments and other photoactive proteins.

    abstract::The protein environments surrounding the retinal tune electronic absorption maximum from 350 to 630 nm. Hybrid quantum mechanical/molecular mechanical (QM/MM) methods can be used in calculating excitation energies of retinal in its native protein environments and in studying the molecular basis of spectral tuning. We ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章,评审


    authors: Altun A,Yokoyama S,Morokuma K

    更新日期:2008-07-01 00:00:00

  • Phototaxis of Haloarcula marismortui revealed through a novel microbial motion analysis algorithm.

    abstract::Haloarcula marismortui has been described to be nonmotile prior to the recent identification of flagellar filaments, suggesting the motile nature of H. marismortui. Here we observed the locomotion of freshly cultured H. marismortui cells and tracked the swimming trajectories via ImageJ. Trajectories of H. marismortui ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Lin YC,Fu HY,Yang CS

    更新日期:2010-09-01 00:00:00

  • The Different Resistance of Two Astragalus Plants to UV-B Stress is Tightly Associated with the Organ-specific Isoflavone Metabolism.

    abstract::In this work, the changes in isoflavone levels and the expression of genes involved in their biosynthesis were studied in two Astragalus by UPLC-MS and real-time PCR after 10 days of UV-B treatment (λmax  = 313 nm, 804 J m-2 ). Isoflavones were significantly induced by UV-B irradiation. The influence might be activate...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Liu Y,Liu J,Wang Y,Abozeid A,Tian DM,Zhang XN,Tang ZH

    更新日期:2018-01-01 00:00:00

  • Identification of ROS produced by photodynamic activity of chlorophyll/cyclodextrin inclusion complexes.

    abstract::Photodynamic therapy (PDT) is a way of treating malignant tumors and hyperproliferative diseases. It is based on the use of photosensitizer, herein the chlorophyll a (chl a), and a light of an appropriate wavelength. The interaction of the photosensitizer (PS) with the light produces reactive oxygen species (ROS), pow...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Cellamare BM,Fini P,Agostiano A,Sortino S,Cosma P

    更新日期:2013-03-01 00:00:00

  • Flavin-based Blue-Light photosensors: a photobiophysics update.

    abstract::This review deals with the biophysical aspects of flavin-based photosensors, comprising cryptochromes, LOV (Light, Oxygen and Voltage) and BLUF (Blue Light sensing Using FAD) proteins. Special emphasis is given to structural issues, photocycle quantum yields and energetics, mechanism of the light-triggered reactions, ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章,评审


    authors: Losi A

    更新日期:2007-11-01 00:00:00

  • A facile method to prepare monodispersed CdS/SiO2 composite microspheres and investigation on their photocatalytic properties.

    abstract::This article presents a facile method to prepare CdS/SiO(2) composite microspheres and their good catalytic properties. In our method, monodispersed SiO(2) particles bearing amino groups (-NH(2)) were synthesized at first and then used as carriers to load nanosized CdS particles to form CdS/SiO(2) composite microspher...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Peng C,Cheng X,Chen S,Li X,Li T,Zhang D,Huang Z,Zhang A

    更新日期:2012-11-01 00:00:00

  • Photoinduced degradation of the herbicide clomazone model reactions for natural and technical systems.

    abstract::The photodegradation of the herbicide clomazone in the presence of S(2)O(8) (2-) or of humic substances of different origin was investigated. A value of (9.4 +/- 0.4) x 10(8) m(-1) s(-1) was measured for the bimolecular rate constant for the reaction of sulfate radicals with clomazone in flash-photolysis experiments. ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: David Gara PM,Bosio GN,Arce VB,Poulsen L,Ogilby PR,Giudici R,Gonzalez MC,Mártire DO

    更新日期:2009-05-01 00:00:00

  • Sunscreens and Cosmetic Formulations Containing Ascorbyl Tetraisopalmitate and Rice Peptides for the Improvement of Skin Photoaging: a Double-blind, Randomized Placebo-controlled Clinical Study.

    abstract::Photoprotective formulations containing substances with antioxidant properties in combination have been used as a strategy for the improvement of photoaged skin conditions. However, there is a lack of studies evaluating the clinical efficacy of these substances in young women with signs of photoaging. Thus, the object...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Fossa Shirata MM,Maia Campos PMBG

    更新日期:2021-02-02 00:00:00

  • Distance-dependent fluorescence quenching of tryptophan by acrylamide.

    abstract::We used GHz frequency-domain fluorometry to investigate the time-dependent intensity decays of N-acetyl-L-trytophanamide (NATA) when collisionally quenched by acrylamide in propylene glycol at 20 degrees C. The intensity decays of NATA became increasingly heterogeneous in the presence of acrylamide. The NATA intensity...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Lakowicz JR,Zelent B,Gryczynski I,Kuśba J,Johnson ML

    更新日期:1994-09-01 00:00:00

  • Diversity of Chlamydomonas channelrhodopsins.

    abstract::Channelrhodopsins act as photoreceptors for control of motility behavior in flagellates and are widely used as genetically targeted tools to optically manipulate the membrane potential of specific cell populations ("optogenetics"). The first two channelrhodopsins were obtained from the model organism Chlamydomonas rei...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Hou SY,Govorunova EG,Ntefidou M,Lane CE,Spudich EN,Sineshchekov OA,Spudich JL

    更新日期:2012-01-01 00:00:00

  • Activities of the bimodal fluorescent protein produced by Photobacterium phosphoreum strain bmFP in the luciferase reaction in vitro.

    abstract::The activity of the bimodal fluorescent protein (bmFP) (lambda max, 488 and 517 nm) in the in vitro luciferase reaction has been studied. The bmFP that is produced by Photobacterium phosphoreum strain bmFP is a dimer of two homologous subunits binding four riboflavin 5'-phosphate (FMN)-myristate chromophores. The addi...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Karatani H,Konaka T

    更新日期:2000-02-01 00:00:00

  • Suberythemal Sun Exposures at Swedish Schools Depend on Sky Views of the Outdoor Environments - Possible Implications for Pupils' Health.

    abstract::More scheduled outdoor stay is increasingly advocated for school children. This study measured 2(nd) , 5(th) and 8(th) graders' erythemal UV-exposure in September, March and May at four Swedish schools. We related those exposures, as fractions of total available ambient radiation, to the schools outdoor environments d...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Pagels P,Wester U,Söderström M,Lindelöf B,Boldemann C

    更新日期:2016-01-01 00:00:00

  • MicroRNAs and photocarcinogenesis.

    abstract::As a new class of sequence-specific regulators of gene expression, the microRNAs (miRNA) form a regulatory network with growth factors and transcription factors participating in various biological processes. It is now being recognized that the various key processes involved in cancer induction are under the control of...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章,评审


    authors: Syed DN,Lall RK,Mukhtar H

    更新日期:2015-01-01 00:00:00

  • Lack of correlation between suppression of contact hypersensitivity by UV radiation and photoisomerization of epidermal urocanic acid in the hairless mouse.

    abstract::The immunological consequences of exposure to UVA (320-400 nm) radiation are unclear. This study describes the relationship between the generation of epidermal cis-urocanic acid and the ability to respond to a contact-sensitizing agent, in hairless mice exposed to different UV radiation sources, which incorporate succ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Reeve VE,Boehm-Wilcox C,Bosnic M,Cope R,Ley RD

    更新日期:1994-09-01 00:00:00

  • Photocytotoxicity of water-soluble metalloporphyrin derivatives.

    abstract::A new water-soluble porphyrin derivative, 2,4-bis(1-decyloxyethyl)-deuteroporphyrinyl-6,7-bisaspart ic acid (C10-DP), and its metal complexes (Ga, I(n), Zn, Mn, Cu, Ni and Fe) were examined for their physicochemical properties (absorption, fluorescence, triplet lifetime and partition coefficient) and photocytotoxicity...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Ando T,Irie K,Koshimizu K,Takemura T,Nishino H,Iwashima A,Takeda N,Nakajima S,Sakata I

    更新日期:1993-04-01 00:00:00

  • Use of potassium iodide as a chemical actinometer.

    abstract::Aqueous solutions of KI were examined for use as chemical actinometers to measure 254 nm (germicidal) radiation. Irradiation results in electron ejection from iodide such that aqueous electrons and iodine atoms are formed. In the presence of N2O, an electron scavenger, recombination of these two reactive species is el...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Rahn RO

    更新日期:1993-12-01 00:00:00

  • Theoretical study of the reaction formalhydrazone with singlet oxygen. Fragmentation of the C=N bond, ene reaction and other processes.

    abstract::Photobiologic and synthetic versatility of hydrazones has not yet been established with (1)O2 as a route to commonly encountered nitrosamines. Thus, to determine whether the "parent" reaction of formalhydrazone and (1)O2 leads to facile C=N bond cleavage and resulting nitrosamine formation, we have carried out CCSD(T)...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Rudshteyn B,Castillo A,Ghogare AA,Liebman JF,Greer A

    更新日期:2014-03-01 00:00:00

  • Systemic suppression of the contact hypersensitivity by the products of protoporphyrin IX photooxidation.

    abstract::Photodynamic therapy (PDT) is frequently accompanied by induction of systemic immunosuppression. Photochemical mechanisms underlying this effect are not completely understood. Here, we demonstrate the immunosuppressive activity of photooxidation products of protoporphyrin IX dimethyl ester (PPIX) in a murine model of ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Kyagova AA,Mansurova GV,Kozir LA,Ponomarev GV,Pavlov VY,Konstantinov IO,Potapenko AY

    更新日期:2005-11-01 00:00:00

  • Photoactivated coumaryl-diazopyruvate fluorescent label for amine functional groups of tissues containing type-I collagen.

    abstract::The design, synthesis and application of a new fluorescent-labeling reagent for collagen has been developed as a prerequisite for the design of a photoactivated collagen-crosslinking compound for surgical wound closure. The amine groups in collagen are the targets of a rational design for a new fluorophore because nat...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Timberlake GT,Reddy GK,Stehno-Bittel L,Weber JF,Amslinger S,Givens RS

    更新日期:2002-11-01 00:00:00

  • Constraints of opsin structure on the ligand-binding site: studies with ring-fused retinals.

    abstract::Ring-fused retinal analogs were designed to examine the hula-twist mode of the photoisomerization of the 9-cis retinylidene chromophore. Two 9-cis retinal analogs, the C11-C13 five-membered ring-fused and the C12-C14 five-membered ring-fused retinal derivatives, formed the pigments with opsin. The C11-C13 ring-fused a...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Hirano T,Lim IT,Kim DM,Zheng XG,Yoshihara K,Oyama Y,Imai H,Shichida Y,Ishiguro M

    更新日期:2002-12-01 00:00:00

  • The effect of charge on cellular uptake and phototoxicity of polylysine chlorin(e6) conjugates.

    abstract::The effect of charge on the cellular uptake, localization and phototoxicity of conjugates between chlorin(e6) (ce6) and poly-L-lysine was studied in vitro. These conjugates (average MW 35-55 kDa) were synthesized to have polycationic, polyanionic or neutral charges. Two human cell lines (A431 epidermoid carcinoma cell...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Soukos NS,Hamblin MR,Hasan T

    更新日期:1997-04-01 00:00:00

  • Lack of correlation between DNA strand breakage and p53 protein levels in human fibroblast strains exposed to ultraviolet lights.

    abstract::The contribution of DNA strand breaks accumulating in the course of nucleotide excision repair to upregulation of the p53 tumor suppressor protein was investigated in human dermal fibroblast strains after treatment with 254 nm ultraviolet (UV) light. For this purpose, fibroblast cultures were exposed to UV and incubat...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Enns L,Murray D,Mirzayans R

    更新日期:2000-10-01 00:00:00

  • Structure and conformation of photosynthetic pigments and related compounds 7. On the conformation of the methyl ester of (20-methyl-phytochlorinato)nickel(II)--a bacteriochlorophyll c model compound.

    abstract::The crystal and molecular structure of the title compound 4 have been determined by single crystal X-ray crystallography. The structure shows the typical S4-ruffled conformation observed for Ni(II) tetrapyrroles. Compared to the structure of the methyl ester of (13(2)-demethoxycarbonyl-pheophorbidato a)nickel(II), 4 s...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Senge MO,Smith KM

    更新日期:1994-08-01 00:00:00

  • Heat and concentration effects on the small heat shock protein, alpha-crystallin.

    abstract::alpha-Crystallin, a major protein of the mammalian lens, plays a vital role in maintaining the structural stability and transparency of the lens. It performs this function through chaperone-like activity; it has recently been reported that heating alpha-crystallin enhances this ability. The present studies, using both...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Mandal K,Dillon J,Gaillard ER

    更新日期:2000-04-01 00:00:00

  • Spectroscopic properties of fluorescein and rhodamine dyes attached to DNA.

    abstract::We report the spectroscopic properties of fluorescein, x-rhodamine, tetramethyl-rhodamine, attached to single strand, duplex DNA, and to the digestion products by DNAse I. The properties reported include: molar absorptivity, quantum yield, absorbance and fluorescence spectra, fluorescence lifetime, intrinsic lifetime ...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Delgadillo RF,Parkhurst LJ

    更新日期:2010-03-01 00:00:00

  • Photogeneration and chemistry of biphenyl quinone methides from hydroxybiphenyl methanols.

    abstract::The photosolvolysis of several biphenyl methanols (Ph-PhCH[Ph]OH) substituted with hydroxy or methoxy groups on the benzene ring not containing the -CH(Ph)OH moiety has been studied in aqueous solution. This work is a continuation of our studies of photosolvolysis of hydroxy-substituted arylmethanols that generate qui...

    journal_title:Photochemistry and photobiology

    pub_type: 杂志文章


    authors: Xu M,Lukeman M,Wan P

    更新日期:2006-01-01 00:00:00