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1. Effect street light pollution on the photosynthetic efficiency of different plants

Author:
Meravi, Neelima; Kumar Prajapati, Santosh
Source:
Biological rhythm research 2020 v.51 no.1 pp. 67-75
ISSN:
1744-4179
Subject:
chlorophyll,   etc   ; photochemistry; photosystem II; pollution;     Show all 4 Subjects
Abstract:
... The present study was conducted to study the effect of light pollution on the photosynthetic efficiency of plants growing near to street light. The photosynthetic parameters Fv/Fm (Fm - Fo/Fm); maximum photochemical quantum yield of PS II (photosystem II), Y II (photochemical quantum yield of photosystem II), Y (NPQ), Y (NO) were recorded with the help of JUNIOR‐PAM, Chlorophyll Fluorometer, Heinz ...
DOI:
10.1080/09291016.2018.1518206

2. New findings on the effect of glyphosate on autotrophic and heterotrophic picoplankton structure: A microcosm approach

Author:
Sabio y García, Carmen Alejandra; Schiaffino, María Romina; Lozano, Verónica Laura; Vera, María Solange; Ferraro, Marcela; Izaguirre, Irina; Pizarro, Haydée
Source:
Aquatic toxicology 2020 v.222 pp. 105463
ISSN:
0166-445X
Subject:
chlorophyll,   etc   ; agrochemicals; freshwater; glyphosate; ponds; turbidity;     Show all 6 Subjects
Abstract:
... Massive use of glyphosate-based herbicides in agricultural activities has led to the appearance of this herbicide in freshwater systems, which represents a potential threat to these systems and their communities. These herbicides can affect autotrophic and heterotrophic picoplankton abundance. However, little is known about glyphosate impact on the whole structure of these assemblages. Herein, we ...
DOI:
10.1016/j.aquatox.2020.105463

3. Comparison of Various Kinds of Vegetative Indices for Chlorophyll Contents Using Low-Resolution Camera

Author:
Kim, Dong-Wook; Silva, Renato Rodrigues; Kim, Ju-Sung; Kim, Yoonha; Kim, Hak-Jin; Chung, Yong Suk
Source:
Journal of crop science and biotechnology 2020 v.23 no.1 pp. 73-79
ISSN:
1975-9479
Subject:
chlorophyll; leaf chlorophyll content,   etc   ; cameras; crops; data collection; models; nitrogen; nitrogen content; pollution;     Show all 9 Subjects
Abstract:
... Nitrogen management is crucial for high yield potential of crops as well as reducing environmental pollution. However, the heterogeneity of nitrogen condition. Thus, there have been attempts to estimate nitrogen contents via chlorophyll contents in leaves. Among them, vegetative indices have been proved to be useful. However, there are many kinds of them and each of them reflects different propert ...
DOI:
10.1007/s12892-019-0347-0

4. Productivity related to ambient photon flux for phytoplankton communities under different turbid conditions

Author:
Båmstedt, Ulf
Source:
Hydrobiologia 2019 v.837 no.1 pp. 109-115
ISSN:
0018-8158
Subject:
chlorophyll,   etc   ; mixing; photons; phytoplankton;     Show all 4 Subjects
Abstract:
... Phytoplankton productivity standardized to chlorophyll a and photon flux (mg C mg chl. a⁻¹ mol photons⁻¹) of natural communities from northern Bothnian Sea under dynamic (vertically rotating) incubations and different optical conditions was studied during four mesocosm experiments between April 2013 and April 2016. The standardized productivity showed a positive exponential relationship with calcu ...
DOI:
10.1007/s10750-019-3964-1

5. Measuring the Ultrafast Correlation Dynamics between the Qₓ and Qy Bands in Chlorophyll Molecules

Author:
Khyasudeen, M. Faisal; Nowakowski, Paweł J.; Tan, Howe-Siang
Source:
TheJournal of physical chemistry 2019 v.123 no.6 pp. 1359-1364
ISSN:
1520-5207
Subject:
chlorophyll,   etc   ; physical chemistry; spectroscopy;     Show all 3 Subjects
Abstract:
... We use two-dimensional electronic spectroscopy to measure the ultrafast correlation dynamics between the Qₓ and Qy transitions in chlorophyll molecules. We derive a variation to the center line slope method to quantify the frequency fluctuation cross-correlation function, Cₓy(Tw). Compared with the frequency fluctuation correlation function of the Qy transition, we observe that there is only a min ...
DOI:
10.1021/acs.jpcb.9b00099

6. Chlorophyll hormesis: Are chlorophylls major components of stress biology in higher plants?

Author:
Agathokleous, Evgenios; Feng, ZhaoZhong; Peñuelas, Josep
Source:
The Science of the total environment 2020 v.726 pp. 138637
ISSN:
0048-9697
Subject:
chlorophyll,   etc   ; herbivores; hormesis; meta-analysis; oxidative stress; pigments; pollution;     Show all 7 Subjects
Abstract:
... High oxidative stress inhibits the synthesis and accumulation of chlorophylls, the pigments that absorb and use light. We collated evidence from a diverse array of studies demonstrating that chlorophyll concentration increases in response to low-level stress and decreases in response to high-level stress. These observations were from 33 species, >20 stress-inducing agents, 43 experimental setups a ...
DOI:
10.1016/j.scitotenv.2020.138637

7. Water quality retrieval and algae inhibition from eutrophic freshwaters with iron-rich substrate based ecological floating beds treatment

Author:
Hu, Zhifeng; Li, Desheng; Guan, Detian
Source:
The Science of the total environment 2020 v.712 pp. 135584
ISSN:
0048-9697
Subject:
chlorophyll,   etc   ; algae; ecological restoration; eutrophication; total phosphorus; water quality;     Show all 6 Subjects
Abstract:
... Ecological floating rafts in restoration of eutrophic freshwaters were deemed to a frequently used method. In this study, a manipulative experiment using ecological floating rafts based on iron-rich substrate (IRS) was conducted. The approach was attempted to study the nutrient removal efficiency and algae inhibition effect of IRS. The results showed that 98.2% chlorophyll-a (chl-a) removal rate w ...
DOI:
10.1016/j.scitotenv.2019.135584

8. Selection and characterization of an improved strain (A-13) of Pyropia yezoensis (Bangiales, Rhodophyta)

Author:
Jiang, Hao; Ding, Hongchang; Zhang, Peng; Wang, Tiegan; Yan, Xinghong
Source:
Aquatic botany 2020 v.163 pp. 103213
ISSN:
0304-3770
Subject:
chlorophyll,   etc   ; Pyropia yezoensis; color; crossing; females; gametophytes; males; mutants; phycobiliprotein;     Show all 9 Subjects
Abstract:
... A crossing experiment between the green mutant (C-0, ♀) and red mutant (fre, ♂) of Pyropia yezoensis was carried out for breeding an improved strain which was fast growing, high quality and wild type color, finally an improved strain (A-13) was isolated from the F₁ gametophytic blades. The mean length and length-width ratio of the 60-day-old blades in A-13 were 73.43 cm and 35.41, which were 1.69 ...
DOI:
10.1016/j.aquabot.2020.103213

9. Design principles of solar light harvesting in plants: Functional architecture of the monomeric antenna CP29

Author:
Mascoli, Vincenzo; Novoderezhkin, Vladimir; Liguori, Nicoletta; Xu, Pengqi; Croce, Roberta
Source:
Biochimica et biophysica acta 2020 v.1861 no.3 pp. 148156
ISSN:
0005-2728
Subject:
chlorophyll; chlorophyll binding proteins,   etc   ; Chlorophyta; antennae; energy conversion; models; mutational analysis; photons; photosynthetic reaction centers; photosystem II; solar radiation; spectroscopy;     Show all 12 Subjects
Abstract:
... In plants and green algae, light-harvesting complexes (LHCs) are a large family of chlorophyll binding proteins functioning as antennae, collecting solar photons and transferring the absorbed energy to the photosynthetic reaction centers, where light to chemical energy conversion begins. Although LHCs are all highly homologous in their structure and display a variety of common features, each compl ...
DOI:
10.1016/j.bbabio.2020.148156

10. Color characteristics, pigment accumulation and biosynthetic analyses of leaf color variation in herbaceous peony (Paeonia lactiflora Pall.)

Author:
Tang, Yuhan; Fang, Ziwen; Liu, Mi; Zhao, Daqiu; Tao, Jun
Source:
3 Biotech 2020 v.10 no.2 pp. 76
ISSN:
2190-572X
Subject:
chlorophyll; chlorophyll b reductase,   etc   ; Paeonia lactiflora; anthocyanins; biosynthesis; color; gene expression; genes; glutamyl-tRNA reductase; herbaceous plants; leaves;     Show all 11 Subjects
Abstract:
... Herbaceous peony (Paeonia lactiflora Pall.) is one of the color-leaved ornamental spring plants, with graceful appearance and splendid color. However, the underlying mechanism of this coloration variation from purple to green has not been studied in P. lactiflora. In th study, the leaves in purple, purple–green, and green stages were compared in terms of anatomical, physiological, and molecular. W ...
DOI:
10.1007/s13205-020-2063-3
PubMed:
32051809
PubMed Central:
PMC6987280

11. Correction to: Why is chlorophyll b only used in light-harvesting systems?

Author:
Kume, Atsushi; Akitsu, Tomoko; Nasahara, Kenlo Nishida
Source:
Journal of plant research 2019 v.132 no.3 pp. 457
ISSN:
0918-9440
Subject:
chlorophyll,   etc   ; light harvesting complex; photosynthesis;     Show all 3 Subjects
Abstract:
... The article Why is chlorophyll b only used in light-harvesting systems. ...
DOI:
10.1007/s10265-019-01104-y
PubMed:
30957193
PubMed Central:
PMC6828287

12. Towards a more accurate future for chlorophyll a and b determinations: the inaccuracies of Daniel Arnon’s assay

Author:
Porra, Robert J.; Scheer, Hugo
Source:
Photosynthesis research 2019 v.140 no.2 pp. 215-219
ISSN:
0166-8595
Subject:
chlorophyll,   etc   ; absorbance; acetone; photosynthesis; solvents;     Show all 5 Subjects
Abstract:
... A recent publication (Esteban in New Phytol 217:341–342, 2018) describes how the use and citation of the assay of chlorophylls a and b extracted in aqueous 80% acetone by Arnon (Plant Physiol 2:1–15, 1949) is increasing, even in journals with high impact factors. This is a very disconcerting situation: the assay is outdated because it relies on the seriously under-estimated extinction coefficients ...
DOI:
10.1007/s11120-018-0579-8

13. Light harvesting complexes in chlorophyll c-containing algae

Author:
Büchel, Claudia
Source:
Biochimica et biophysica acta 2020 v.1861 no.4 pp. 148027
ISSN:
0005-2728
Subject:
chlorophyll; chlorophyll binding proteins,   etc   ; Bacillariophyceae; Eustigmatophyceae; Haptophyta; Phaeophyceae; algae; autotrophs; carotenoids; chemical structure; energy transfer; harvesting; pigmentation; pigments; radiation resistance; vascular plants;     Show all 16 Subjects
Abstract:
... Besides the so-called ‘green lineage’ of eukaryotic photosynthetic organisms that include vascular plants, a huge variety of different algal groups exist that also harvest light by means of membrane intrinsic light harvesting proteins (Lhc). The main taxa of these algae are the Cryptophytes, Haptophytes, Dinophytes, Chromeridae and the Heterokonts, the latter including diatoms, brown algae, Xantho ...
DOI:
10.1016/j.bbabio.2019.05.003

14. Chlorophyll Content in Two Medicinal Plant Species Following Nano-TiO2 Exposure

Author:
Motyka, Oldřich; Štrbová, Kristína; Zinicovscaia, Inga
Source:
Bulletin of environmental contamination and toxicology 2020 v.104 no.3 pp. 373-379
ISSN:
0007-4861
Subject:
chlorophyll; leaf chlorophyll content,   etc   ; Mentha piperita nothosubsp. piperita; Salvia officinalis; aluminum; calcium; leaves; magnesium; manganese; medicinal plants; physiological state; potassium; root systems; sage; shoots; sodium; soil;     Show all 17 Subjects
Abstract:
... Chlorophyll content in leaves is a convenient indicator of the physiological state of the plant following exposure to a stressor. In the present study, a pot experiment was carried out using two medicinal plant species – peppermint (Mentha X piperita L.) and common sage (Salvia officinalis L.) to determine the link between the chlorophyll content in the plant leaves and the exposure of the plants ...
DOI:
10.1007/s00128-020-02787-z

15. Selective voltammetric detection of chlorophylls using a semi-circular potential wave

Author:
Wang, Yuanzhe; Chen, Lifu; Compton, Richard G.
Source:
Food chemistry 2020 v.323 pp. 126844
ISSN:
0308-8146
Subject:
chlorophyll,   etc   ; electrochemistry; food quality; glassy carbon electrode; quality control; spinach; voltammetry;     Show all 7 Subjects
Abstract:
... A simple electrochemical method employing a novel semi-circular potential sweep voltammetry on a glassy carbon (GC) electrode was developed to distinguish and quantify two main chlorophyll components (chlorophyll a and b) present in their mixtures. The semi-circular potential sweep generates large, transient scan rates, enabling the selective detection of species with closely similar oxidative pot ...
DOI:
10.1016/j.foodchem.2020.126844

16. Assessment of the optical properties of peaches with fungal infection using spatially-resolved diffuse reflectance technique and their relationships with tissue structural and biochemical properties

Author:
Sun, Ye; Lu, Renfu; Pan, Leiqing; Wang, Xiaochan; Tu, Kang
Source:
Food chemistry 2020 v.321 pp. 126704
ISSN:
0308-8146
Subject:
chlorophyll,   etc   ; absorption; color; disease detection; fungi; membrane permeability; peaches; reflectance; scanning electron microscopy; sugars; titratable acidity;     Show all 11 Subjects
Abstract:
... This research measured the optical absorption (µₐ) and reduced scattering (μₛ') properties in peaches during quality deterioration, and determine the relationships of the optical parameters with select structural and biochemical parameters. Spatially resolved reflectance was measured for healthy and fungal infected peaches, followed by physical (the size and tissue color), structural [membrane per ...
DOI:
10.1016/j.foodchem.2020.126704

17. HPLC-hrTOF-MS study of copper chlorophylls: Composition of food colorants and biochemistry after ingestion

Author:
Pérez-gálvez, Antonio; Viera, Isabel; Benito, Itziar; Roca, María
Source:
Food chemistry 2020 v.321 pp. 126721
ISSN:
0308-8146
Subject:
chlorophyll,   etc   ; absorption; blood serum; copper; feces; food colorants; food composition; foods; ingestion; lipids; liver; urine;     Show all 12 Subjects
Abstract:
... Despite the daily consumption of copper chlorophylls (E-141i), the green food colorants in foods high in fats, there is a general need for knowledge regarding their exact composition. Consequently, we have analyzed by HPLC-ESI(+)/APCI(+)-hrTOF-MS² the accurate composition of different commercial copper chlorophyll colorants for the first time. Data showed a favored yield of copper pheophytins from ...
DOI:
10.1016/j.foodchem.2020.126721

18. Development of a single helical baffle to increase CO2 gas and microalgal solution mixing and Chlorella PY-ZU1 biomass yield

Author:
Ali Kubar, Ameer; Cheng, Jun; Guo, Wangbiao; Kumar, Santosh; Song, Yanmei
Source:
Bioresource technology 2020 v.307 pp. 123253
ISSN:
0960-8524
Subject:
chlorophyll,   etc   ; Chlorella; biomass production; carbon dioxide; electron transfer; fluorescence; mass transfer; microalgae; photochemistry; photosynthesis;     Show all 10 Subjects
Abstract:
... A single helical baffle (SHB), consisting of twisted turns, was developed to convert straight flow into spiral flow in a Chlorella PY-ZU1 open raceway pond (ORWP) bubbled with 15% CO₂. Microalgal solution flowing through the SHB alternative helical interspaces generated whirling flow both vertically and horizontally, which decreased mixing and increased mass transfer rates. The optimized SHB had a ...
DOI:
10.1016/j.biortech.2020.123253

19. Parameter uncertainty drives important incongruities between simulated chlorophyll-a and phytoplankton functional group dynamics in a mechanistic management model

Author:
Nelson, Natalie G.; Muñoz-Carpena, Rafael; Phlips, Edward
Source:
Environmental modelling & software 2020 v.129 pp. 104708
ISSN:
1364-8152
Subject:
chlorophyll,   etc   ; Cyanobacteria; biomass; mechanistic models; moieties; parameter uncertainty; phosphorus; phytoplankton; water quality;     Show all 9 Subjects
Abstract:
... Mechanistic phytoplankton functional group (PFG) models are used to develop water quality targets designed to mitigate cyanobacteria blooms, but it remains unclear whether PFG models adequately simulate cyanobacteria dynamics as most are evaluated against observations of chlorophyll-a instead of PFG biomass. To address this challenge, we analyzed an application of CE-QUAL-ICM, a 3D mechanistic PFG ...
DOI:
10.1016/j.envsoft.2020.104708

20. Evidence that chlorophyll f functions solely as an antenna pigment in far-red-light photosystem I from Fischerella thermalis PCC 7521

Author:
Cherepanov, Dmitry A.; Shelaev, Ivan V.; Gostev, Fedor E.; Aybush, Arseniy V.; Mamedov, Mahir D.; Shen, Gaozhong; Nadtochenko, Victor A.; Bryant, Donald A.; Semenov, Alexey Yu.; Golbeck, John H.
Source:
Biochimica et biophysica acta 2020 v.1861 no.5-6 pp. 148184
ISSN:
0005-2728
Subject:
chlorophyll,   etc   ; Chroococcidiopsis thermalis; Fischerella; electron transfer; far-red light; light harvesting complex; photosystem I; white light;     Show all 8 Subjects
Abstract:
... The Photosystem I (PSI) reaction center in cyanobacteria is comprised of ~96 chlorophyll (Chl) molecules, including six specialized Chl molecules denoted Chl1A/Chl1B (P₇₀₀), Chl2A/Chl2B, and Chl3A/Chl3B that are arranged in two branches and function in primary charge separation. It has recently been proposed that PSI from Chroococcidiopsis thermalis (Nürnberg et al. (2018) Science 360, 1210–1213) ...
DOI:
10.1016/j.bbabio.2020.148184