scholarly journals Extensive remodeling of a cyanobacterial photosynthetic apparatus in far-red light

Science ◽  
2014 ◽  
Vol 345 (6202) ◽  
pp. 1312-1317 ◽  
Author(s):  
F. Gan ◽  
S. Zhang ◽  
N. C. Rockwell ◽  
S. S. Martin ◽  
J. C. Lagarias ◽  
...  
Keyword(s):  
Red Light ◽  
Photosynthetic Apparatus

Preillumination of excised spinach leaves with red light increases resistance of photosynthetic apparatus to UV radiation

2012 ◽  
Vol 59 (6) ◽  
pp. 717-723 ◽  
Author(s):  
V. D. Kreslavskii ◽  
M. S. Khristin ◽  
N. I. Shabnova ◽  
V. Yu. Lyubimov
Keyword(s):  
Uv Radiation ◽  
Red Light ◽  
Photosynthetic Apparatus ◽  
Spinach Leaves

Response of the photosynthetic apparatus to UV-A and red light in the phytochrome B-deficient Arabidopsis thaliana L. hy3 mutant

2016 ◽  
Vol 54 (3) ◽  
pp. 321-330 ◽  
Author(s):  
V. D. Kreslavski ◽  
F. J. Schmitt ◽  
C. Keuer ◽  
T. Friedrich ◽  
G. N. Shirshikova ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Red Light ◽  
Photosynthetic Apparatus ◽  
Phytochrome B

scholarly journals Seeing the Light: The Roles of Red- and Blue-Light Sensing in Plant Microbes

2018 ◽  
Vol 56 (1) ◽  
pp. 41-66 ◽  
Author(s):  
Gwyn A. Beattie ◽  
Bridget M. Hatfield ◽  
Haili Dong ◽  
Regina S. McGrane
Keyword(s):  
Blue Light ◽  
Molecular Mechanisms ◽  
Red Light ◽  
Light Availability ◽  
Photosynthetic Apparatus ◽  
Light Regulation ◽  
Environmental Signals ◽  
Light Sensing ◽  
Fungal Phytopathogens ◽  
Bacteria And Fungi

Plants collect, concentrate, and conduct light throughout their tissues, thus enhancing light availability to their resident microbes. This review explores the role of photosensing in the biology of plant-associated bacteria and fungi, including the molecular mechanisms of red-light sensing by phytochromes and blue-light sensing by LOV (light-oxygen-voltage) domain proteins in these microbes. Bacteriophytochromes function as major drivers of the bacterial transcriptome and mediate light-regulated suppression of virulence, motility, and conjugation in some phytopathogens and light-regulated induction of the photosynthetic apparatus in a stem-nodulating symbiont. Bacterial LOV proteins also influence light-mediated changes in both symbiotic and pathogenic phenotypes. Although red-light sensing by fungal phytopathogens is poorly understood, fungal LOV proteins contribute to blue-light regulation of traits, including asexual development and virulence. Collectively, these studies highlight that plant microbes have evolved to exploit light cues and that light sensing is often coupled with sensing other environmental signals.

Influences of Blue and Red Light on the Photosynthetic Apparatus ofChlorella kessleri*

Botanica Acta ◽  
1992 ◽  
Vol 105 (3) ◽  
pp. 168-173 ◽  
Author(s):  
Regina Grotjohann ◽  
Myung-Sook Rho ◽  
W. Kowallik
Keyword(s):  
Red Light ◽  
Photosynthetic Apparatus

scholarly journals On the origin of a slowly reversible fluorescence decay component in the Arabidopsis npq4 mutant

2014 ◽  
Vol 369 (1640) ◽  
pp. 20130221 ◽  
Author(s):  
Luca Dall'Osto ◽  
Stefano Cazzaniga ◽  
Masamitsu Wada ◽  
Roberto Bassi
Keyword(s):  
Red Light ◽  
Photosynthetic Apparatus ◽  
Atp Synthesis ◽  
Carotenoid Biosynthesis ◽  
Fluorescence Decay ◽  
Photon Absorption ◽  
State Transitions ◽  
Photochemical Quenching ◽  
Decay Component ◽  
Kinetics Of

Over-excitation of photosynthetic apparatus causing photoinhibition is counteracted by non-photochemical quenching (NPQ) of chlorophyll fluorescence, dissipating excess absorbed energy into heat. The PsbS protein plays a key role in this process, thus making the PsbS-less npq4 mutant unable to carry out qE, the major and most rapid component of NPQ. It was proposed that npq4 does perform qE-type quenching, although at lower rate than WT Arabidopsis . Here, we investigated the kinetics of NPQ in PsbS-depleted mutants of Arabidopsis . We show that red light was less effective than white light in decreasing maximal fluorescence in npq4 mutants. Also, the kinetics of fluorescence dark recovery included a decay component, qM, exhibiting the same amplitude and half-life in both WT and npq4 mutants. This component was uncoupler-sensitive and unaffected by photosystem II repair or mitochondrial ATP synthesis inhibitors. Targeted reverse genetic analysis showed that traits affecting composition of the photosynthetic apparatus, carotenoid biosynthesis and state transitions did not affect qM. This was depleted in the npq4phot2 mutant which is impaired in chloroplast photorelocation, implying that fluorescence decay, previously described as a quenching component in npq4 is, in fact, the result of decreased photon absorption caused by chloroplast relocation rather than a change in the activity of quenching reactions.

scholarly journals Manipulation of light spectrum can improve the performance of photosynthetic apparatus of strawberry plants growing under salt and alkalinity stress

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0261585
Author(s):  
Majid Esmaeilizadeh ◽  
Mohammad Reza Malekzadeh Shamsabad ◽  
Hamid Reza Roosta ◽  
Piotr Dąbrowski ◽  
Marcin Rapacz ◽  
...  
Keyword(s):  
Blue Light ◽  
Red Light ◽  
Photosynthetic Apparatus ◽  
Stress Conditions ◽  
Control Treatment ◽  
Light Spectrum ◽  
Light Spectra ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency ◽  
Metabolic Activities

Strawberry is one of the plants sensitive to salt and alkalinity stress. Light quality affects plant growth and metabolic activities. However, there is no clear answer in the literature on how light can improve the performance of the photosynthetic apparatus of this species under salt and alkalinity stress. The aim of this work was to investigate the effects of different spectra of supplemental light on strawberry (cv. Camarosa) under salt and alkalinity stress conditions. Light spectra of blue (with peak 460 nm), red (with peak 660 nm), blue/red (1:3), white/yellow (1:1) (400–700 nm) and ambient light were used as control. There were three stress treatments: control (no stress), alkalinity (40 mM NaHCO3), and salinity (80 mM NaCl). Under stress conditions, red and red/blue light had a positive effect on CO2 assimilation. In addition, blue/red light increased intrinsic water use efficiency (WUEi) under both stress conditions. Salinity and alkalinity stress decreased OJIP curves compared to the control treatment. Blue light caused an increase in its in plants under salinity stress, and red and blue/red light caused an increase in its in plants under alkalinity. Both salt and alkalinity stress caused a significant reduction in photosystem II (PSII) performance indices and quantum yield parameters. Adjustment of light spectra, especially red light, increased these parameters. It can be concluded that the adverse effects of salt and alkalinity stress on photosynthesis can be partially alleviated by changing the light spectra.

The effect of red light on a photosynthetic apparatus under auto- and photo-heterotrophic growth of Spirulina platensis (Nordst.) Geitl. (Cyanophyta)

2007 ◽  
Vol 9 (4) ◽  
pp. 342-349
Author(s):  
Svetlana I. Los' ◽  
R. N. Fomishina ◽  
S. N. Vasilchenko ◽  
T. O. Zakharova ◽  
Alexandr A. Sivash
Keyword(s):  
Spirulina Platensis ◽  
Red Light ◽  
Photosynthetic Apparatus ◽  
Heterotrophic Growth

Sites of Action of Copper in the Photosynthetic Apparatus of Maize Leaves: Kinetic Analysis of Chlorophyll Fluorescence, Oxygen Evolution, Absorption Changes and Thermal Dissipation as Monitored by Photoacoustic Signals

1997 ◽  
Vol 24 (1) ◽  
pp. 81 ◽  
Author(s):  
Georgia Ouzounidou ◽  
Michael Moustakas ◽  
Reto J. Strasser
Keyword(s):  
Chlorophyll Fluorescence ◽  
Red Light ◽  
Photosynthetic Apparatus ◽  
Thermal Dissipation ◽  
Chlorophyll Fluorescence Induction ◽  
O2 Evolution ◽  
Reaction Centre ◽  
Maize Leaves ◽  
Sites Of Action

Fluorescence, absorbance and photoacoustic methods were used to examine in vivo various functional aspects of the photochemical apparatus of maize leaves exposed to different Cu concentrations. The primary photochemistry of a dark adapted leaf was less affected in the presence of Cu, while in a light-adapted leaf the photochemical events were severely impaired by Cu. Analysis of the characteristics of chlorophyll fluorescence induction revealed that the primary target of Cu stress involved the PSII reaction centre in its ability to adapt to high light conditions. Denaturation of PSII occured at 80 µM Cu resulting in a significant loss of PSII-mediated electron transport under continuous light and a strong inhibition of O2 evolution. It was also observed that PSI photochemistry, as probed by the photochemical energy storage in far-red light and the kinetics of P700 photooxidation by strong far- red light, was more tolerant to Cu compared to the PSII activity. Moreover, in Cu-exposed leaves irradiated with high intensity light, the in vivo heat emission yield increased due to the Cu deactivation of photosynthetic energy conservation. Heat release was well correlated with changes in non- photochemical quenching. Copper gradually prevents the adaptation process from a dark-adapted to a light-adapted state with the consequence that all observed photosynthetic activity criteria under steady state conditions in the light become more inefficient.

scholarly journals Extensive remodeling of the photosynthetic apparatus alters energy transfer among photosynthetic complexes when cyanobacteria acclimate to far-red light

2020 ◽  
Vol 1861 (4) ◽  
pp. 148064 ◽  
Author(s):  
Ming-Yang Ho ◽  
Dariusz M. Niedzwiedzki ◽  
Craig MacGregor-Chatwin ◽  
Gary Gerstenecker ◽  
C. Neil Hunter ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Red Light ◽  
Photosynthetic Apparatus ◽  
Photosynthetic Complexes

scholarly journals Functional Aspects of Early Light-Induced Protein (ELIP) Genes from the Desiccation-Tolerant Moss Syntrichia caninervis

2020 ◽  
Vol 21 (4) ◽  
pp. 1411
Author(s):  
Xiujin Liu ◽  
Yigong Zhang ◽  
Honglan Yang ◽  
Yuqing Liang ◽  
Xiaoshuang Li ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Light Stress ◽  
Red Light ◽  
Ectopic Expression ◽  
Photosynthetic Apparatus ◽  
Transcript Abundance ◽  
High Light ◽  
Syntrichia Caninervis ◽  
Leaf Chlorophyll ◽  
Functional Aspects

The early light-induced proteins (ELIPs) are postulated to act as transient pigment-binding proteins that protect the chloroplast from photodamage caused by excessive light energy. Desert mosses such as Syntrichia caninervis, that are desiccation-tolerant and homoiochlorophyllous, are often exposed to high-light conditions when both hydrated and dry ELIP transcripts are accumulated in response to dehydration. To gain further insights into ELIP gene function in the moss S. caninervis, two ELIP cDNAs cloned from S. caninervis, ScELIP1 and ScELIP2 and both sequences were used as the basis of a transcript abundance assessment in plants exposed to high-light, UV-A, UV-B, red-light, and blue-light. ScELIPs were expressed separately in an Arabidopsis ELIP mutant Atelip. Transcript abundance for ScELIPs in gametophytes respond to each of the light treatments, in similar but not in identical ways. Ectopic expression of either ScELIPs protected PSII against photoinhibition and stabilized leaf chlorophyll content and thus partially complementing the loss of AtELIP2. Ectopic expression of ScELIPs also complements the germination phenotype of the mutant and improves protection of the photosynthetic apparatus of transgenic Arabidopsis from high-light stress. Our study extends knowledge of bryophyte photoprotection and provides further insight into the molecular mechanisms related to the function of ELIPs.

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