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1. Morphophysiological responses of Aechmea blanchetiana (Bromeliaceae) to excess copper during in vitro culture

Author:
Martins, João Paulo Rodrigues; Rodrigues, Luiz Carlos de Almeida; Silva, Thayna dos Santos; Rossini, Franciele Pereira; Gontijo, Andreia Barcelos Passos Lima; Falqueto, Antelmo Ralph
Source:
Plant biosystems 2021 v.155 no.3 pp. 447-456
ISSN:
1724-5575
Subject:
chlorophyll,   etc   ; Aechmea; chlorenchyma; copper; fluorescence; liquids; photosynthesis;     Show all 7 Subjects
Abstract:
... The use of plants as bioindicators can be effective for environmental monitoring, mainly related to heavy metals such as copper (Cu). In vitro conditions are more easily controlled, to enable isolating the stress factors that can interfere in plants’ responses. The aim was to investigate the morphophysiological responses of Aechmea blanchetiana submitted to excess Cu, and to verify the degree of t ...
DOI:
10.1080/11263504.2020.1756976

2. Optimizing homogenizer-assisted extraction of chlorophylls from plantain epicarp (Musa paradisiaca L.)

Author:
Ordóñez-Santos, Luis Eduardo; Garzón-García, Alba Mery
Source:
Journal of food measurement & characterization 2021 v.15 no.2 pp. 1108-1115
ISSN:
2193-4126
Subject:
chlorophyll,   etc   ; Musa paradisiaca; exocarp; maceration; measurement; solvents;     Show all 6 Subjects
Abstract:
... The objective of this study was to establish parameters of optimization of the factors such as solid/solvent ratio, stirring speed and extraction time in homogenizer-assisted extraction (HAE) of chlorophyll a, b and total from plantain epicarp (Musa paradisiaca L.) using the Box–Benhken design. The individual effect and the interactions of the process variables (solid/solvent ratio, stirring speed ...
DOI:
10.1007/s11694-020-00703-x

3. Short-Term Response of Chlorophyll a Concentration Due to Intense Wind and Freshwater Peak Episodes in Estuaries: The Case of Fangar Bay (Ebro Delta)

Author:
F-Pedrera Balsells, Marta; Grifoll, Manel; Fernández-Tejedor, Margarita; Espino, Manuel
Source:
Water 2021 v.13 no.5
ISSN:
2073-4441
Subject:
chlorophyll,   etc   ; biomass; estuaries; freshwater; hydrodynamics; wind speed;     Show all 6 Subjects
Abstract:
... Estuaries and coastal bays are areas of large spatio-temporal variability in physical and biological variables due to environmental factors such as local wind, light availability, freshwater inputs or tides. This study focuses on the effect of strong wind events and freshwater peaks on short-term chlorophyll a (Chl a) concentration distribution in the small-scale and microtidal, Fangar Bay (Ebro D ...
DOI:
10.3390/w13050701

4. Analysis of the Correlation between the Phytoplankton Development Level, Assessed by Chlorophyll a, and Nutrient Concentrations in Rybinsk Reservoir

Author:
Stepanova, I. E.
Source:
Biology bulletin of the Russian Academy of Sciences 2021 v.48 no.2 pp. 193-198
ISSN:
1062-3590
Subject:
chlorophyll,   etc   ; nitrogen; phosphorus; phytoplankton; total nitrogen;     Show all 5 Subjects
Abstract:
... A correlation analysis between chlorophyll a, nitrogen, and phosphorus compounds in Rybinsk Reservoir is carried out. During certain periods of the study, a significant correlation between chlorophyll a and inorganic nitrogen and phosphorus compounds is shown. The response of phytoplankton to the total nitrogen and phosphorus concentrations is evaluated. ...
DOI:
10.1134/S1062359021020114

5. Research on Inversion Mechanism of Chlorophyll—A Concentration in Water Bodies Using a Convolutional Neural Network Model

Author:
Xue, Yun; Zhu, Lei; Zou, Bin; Wen, Yi-min; Long, Yue-hong; Zhou, Song-lin
Source:
Water 2021 v.13 no.5
ISSN:
2073-4441
Subject:
chlorophyll,   etc   ; lakes; neural networks; surface water; China;     Show all 5 Subjects
Abstract:
... For Case-II water bodies with relatively complex water qualities, it is challenging to establish a chlorophyll-a concentration (Chl-a concentration) inversion model with strong applicability and high accuracy. Convolutional Neural Network (CNN) shows excellent performance in image target recognition and natural language processing. However, there little research exists on the inversion of Chl-a co ...
DOI:
10.3390/w13050664

6. Picophytoplankton distribution along Khatanga Bay-shelf-continental slope environment gradients in the western Laptev Sea

Author:
Belevich, Tatiana A.; Demidov, Аndrey B.; Makkaveev, Peter N.; Shchuka, Sergei A.; Flint, Mikhail V.
Source:
Heliyon 2021 v.7 no.2 pp. e06224
ISSN:
2405-8440
Subject:
chlorophyll,   etc   ; biomass; climate; marine ecosystems; photosynthesis; salinity;     Show all 6 Subjects
Abstract:
... The spatial variations of photosynthetic picoplankton abundance and biomass and the picoplankton's contribution to chlorophyll a concentration along the transect from Khatanga Bay to the continental slope in the western part of the Laptev Sea were studied in September 2017. Picoeukaryotes dominated in the picophytoplankton communities. Picophytoplankton in Khatanga Bay showed more variability than ...
DOI:
10.1016/j.heliyon.2021.e06224

7. Simultaneous quantification of chemical constituents in matcha with visible-near infrared hyperspectral imaging technology

Author:
Ouyang, Qin; Wang, Li; Park, Bosoon; Kang, Rui; Chen, Quansheng
Source:
Food chemistry 2021 v.350 pp. 129141
ISSN:
0308-8146
Subject:
chlorophyll,   etc   ; accuracy; caffeine; food chemistry; polyphenols; shrinkage; tea; technology;     Show all 8 Subjects
Abstract:
... This study aimed to assess the feasibility of identifying multiple chemical constituents in matcha using visible-near infrared hyperspectral imaging (VNIR-HSI) technology. Regions of interest (ROIs) were first defined in order to calculate the representative mean spectrum of each sample. Subsequently, the standard normal variate (SNV) method was applied to correct the characteristic spectra. Compe ...
DOI:
10.1016/j.foodchem.2021.129141

8. Use of terrestrial remote sensing to estimate soybeans and beans biophysical parameters

Author:
Prudente, Victor Hugo Rohden; Mercante, Erivelto; Johann, Jerry Adriani; Souza, Carlos Henrique Wachholz de; Cattani, Carlos Eduardo Vizzotto; Mendes, Isaque Souza; Caon, Ivã Luis
Source:
Geocarto international 2021 v.36 no.7 pp. 773-790
ISSN:
1752-0762
Subject:
chlorophyll,   etc   ; leaf area index; models; photosynthetically active radiation; vegetation;     Show all 5 Subjects
Abstract:
... Vegetation Indices are important for agricultural monitoring and the assessment of biophysical attributes of different crops. In this context, the objective of this study was to evaluate the relationships between normalized difference vegetation indices (NDVIs) obtained by different terrestrial remote sensors (active and passive), with respect to biophysical aspects of soybeans and beans. With the ...
DOI:
10.1080/10106049.2019.1624982

9. Growth and saxitoxin production responses to copper (CuCl2) exposure by the cyanobacterium Raphidiopsis raciborskii

Author:
Giraldi, Lais Albuquerque; Vargas, Sarah Regina; Santos, Paulo Vagner; Tonietto, Alessandra Emanuele; Winck, Flavia Vischi; Calijuri, Maria do Carmo
Source:
Journal of applied phycology 2021 v.33 no.2 pp. 891-900
ISSN:
0921-8971
Subject:
chlorophyll,   etc   ; Raphidiopsis; acclimation; algicides; algology; fertilizers; humans; microalgae; saxitoxins; toxicity;     Show all 10 Subjects
Abstract:
... Copper (Cu²⁺) is an essential micronutrient for cyanobacteria, but it has a toxic effect above a certain threshold. The presence of Cu²⁺ in water is usually related to human activity due to it being used in pesticides, fertilizer, and algaecides. Previous studies observed that high Cu²⁺ concentrations stimulated toxin synthesis in cyanobacteria and microalgae. Furthermore, saxitoxins (STXs) can bi ...
DOI:
10.1007/s10811-020-02324-9

10. Pigment content analysis in two HAB forming dinoflagellate species during the growth period

Author:
Zahedi Dizaji, Somayeh; Attaran Fariman, Gilan; Zahedi, Mir Mahdi
Source:
Journal of applied phycology 2021 v.33 no.2 pp. 807-817
ISSN:
0921-8971
Subject:
chlorophyll,   etc   ; Miozoa; algology; carotenoids; chloroplasts; microalgae; salinity; temperature; Oman;     Show all 9 Subjects
Abstract:
... Dinoflagellates form a large group of microalgae that have different pigments and the pigment content can vary depending on environmental conditions such as temperature, salinity, and their growth phase. They have the potential to cause red tides in coastal waters, so it is important to identify their pigments. In this study, two bloom forming dinoflagellate species, Scrippsiella trochoidea and Gy ...
DOI:
10.1007/s10811-020-02331-w

11. Plant trait estimation and classification studies in plant phenotyping using machine vision – A review

Author:
Kolhar, Shrikrishna; Jagtap, Jayant
Source:
Information processing in agriculture 2021
ISSN:
2214-3173
Subject:
chlorophyll,   etc   ; agriculture; canopy; computer vision; data collection; information; phenotype; surveys;     Show all 8 Subjects
Abstract:
... Today there is a rapid development taking place in phenotyping of plants using non-destructive image based machine vision techniques. Machine vision based plant phenotyping ranges from single plant trait estimation to broad assessment of crop canopy for thousands of plants in the field. Plant phenotyping systems either use single imaging method or integrative approach signifying simultaneous use o ...
DOI:
10.1016/j.inpa.2021.02.006

12. Mixed Models as a Tool for Comparing Groups of Time Series in Plant Sciences

Author:
Spyroglou, Ioannis; Skalák, Jan; Balakhonova, Veronika; Benedikty, Zuzana; Rigas, Alexandros G.; Hejátko, Jan
Source:
Plants 2021 v.10 no.2
ISSN:
2223-7747
Subject:
chlorophyll,   etc   ; autocorrelation; phenotype; statistical inference; statistical models; time series analysis;     Show all 6 Subjects
Abstract:
... Plants adapt to continual changes in environmental conditions throughout their life spans. High-throughput phenotyping methods have been developed to noninvasively monitor the physiological responses to abiotic/biotic stresses on a scale spanning a long time, covering most of the vegetative and reproductive stages. However, some of the physiological events comprise almost immediate and very fast r ...
DOI:
10.3390/plants10020362

13. Rapid Quantification of Microalgae Growth with Hyperspectral Camera and Vegetation Indices

Author:
Salmi, Pauliina; Eskelinen, Matti A.; Leppänen, Matti T.; Pölönen, Ilkka
Source:
Plants 2021 v.10 no.2
ISSN:
2223-7747
Subject:
chlorophyll,   etc   ; absorbance; biomass; cameras; cost effectiveness; liquids; microalgae; vegetation;     Show all 8 Subjects
Abstract:
... Spectral cameras are traditionally used in remote sensing of microalgae, but increasingly also in laboratory-scale applications, to study and monitor algae biomass in cultures. Practical and cost-efficient protocols for collecting and analyzing hyperspectral data are currently needed. The purpose of this study was to test a commercial, easy-to-use hyperspectral camera to monitor the growth of diff ...
DOI:
10.3390/plants10020341

14. Chlorophyll Derivative-Sensitized TiO₂ Electron Transport Layer for Record Efficiency of Cs₂AgBiBr₆ Double Perovskite Solar Cells

Author:
Wang, Baoning; Li, Na; Yang, Lin; Dall’Agnese, Chunxiang; Jena, Ajay Kumar; Sasaki, Shin-ichi; Miyasaka, Tsutomu; Tamiaki, Hitoshi; Wang, Xiao-Feng
Source:
Journal of the American Chemical Society 2021 v.143 no.5 pp. 2207-2211
ISSN:
1520-5126
Subject:
chlorophyll,   etc   ; electron transfer; hysteresis; porous media; spectral analysis;     Show all 5 Subjects
Abstract:
... The power conversion efficiency (PCE) of Cs₂AgBiBr₆-based perovskite solar cells (PSCs) is still low owing to the inherent defects of Cs₂AgBiBr₆ films. Herein, we demonstrate a carboxy-chlorophyll derivative (C-Chl)-sensitized mesoporous TiO₂ (m-TiO₂) film as an electron transport layer (ETL) to enhance and extend the absorption spectrum of Cs₂AgBiBr₆-based PSCs. The C-Chl-based device achieves a ...
DOI:
10.1021/jacs.0c12786

15. Algal nutrient limitation and metal uptake experiment in the Åkerberg pit lake, northern Sweden

Author:
Paulsson, Oscar; Widerlund, Anders
Source:
Applied geochemistry 2021 v.125 pp. 104829
ISSN:
0883-2927
Subject:
chlorophyll,   etc   ; algae; cadmium; cobalt; geochemistry; lakes; nickel; summer; zinc; Sweden;     Show all 10 Subjects
Abstract:
... A microcosm nutrient limitation experiment was conducted in the Åkerberg pit lake, located in Västerbotten, northern Sweden, in the summer of 2018. The microcosms were fertilized with N, P and N and P in combination. Chlorophyll-a concentrations were used to estimate algal growth. Filtered and suspended metal concentrations of the microcosms were compared to see if an increase in algal growth woul ...
DOI:
10.1016/j.apgeochem.2020.104829

16. Pigments from Eustigmatophyceae: an interesting class of microalgae for carotenoid production

Author:
Amaral, Raquel; de Melo, J. Sérgio Seixas; dos Santos, Lília Maria Antunes
Source:
Journal of applied phycology 2021 v.33 no.1 pp. 371-384
ISSN:
0921-8971
Subject:
chlorophyll,   etc   ; Characiopsis; Eustigmatophyceae; algology; esters; health promotion; microalgae; photosynthesis; violaxanthin;     Show all 9 Subjects
Abstract:
... Pigments are a fundamental part of the microalgal cell, with chlorophylls at the center of photosynthesis and carotenoids as accessory pigments. The characteristic pigment profile of the Eustigmatophyceae was one of the evidences which contributed to the segregation of this class of organisms from the Xanthophyceae. Recent findings indicate that eustigmatophyte carotenoids are interesting compound ...
DOI:
10.1007/s10811-020-02312-z

17. Standardization of instantaneous fluoroprobe measurements of benthic algal biomass and composition in streams

Author:
Rosero-López, D.; Walter, M.T.; Flecker, A.S.; Ontaneda, D.F.; Dangles, O.
Source:
Ecological indicators 2021 v.121 pp. 107185
ISSN:
1470-160X
Subject:
chlorophyll,   etc   ; algae; aquatic ecosystems; biomass; public water supply;     Show all 5 Subjects
Abstract:
... Fluoroprobes, such as BenthoTorch, offer a relatively rapid in situ method for monitoring benthic algae, provide new opportunities for aquatic ecological research, and enable early warning of algal proliferation in municipal water supplies. Currently, however, BenthoTorch is limited for the measurement of heterogeneous samples, and homogenizing samples is rather difficult. In this study, we compar ...
DOI:
10.1016/j.ecolind.2020.107185

18. Variation in Photosynthetic Performance Relative to Thallus Microhabitat Heterogeneity in Lithothamnion australe (Rhodophyta, Corallinales) Rhodoliths

Author:
Kim, Ju‐Hyoung; Steller, Diana L.; Edwards, Matthew S.
Source:
Journal of phycology 2021 v.57 no.1 pp. 234-244
ISSN:
0022-3646
Subject:
chlorophyll,   etc   ; Corallinales; Lithothamnium; algology; boats; fluorescence; microhabitats; photosynthesis; thallus;     Show all 9 Subjects
Abstract:
... Rhodoliths are free‐living, coralline algae that create heterogeneous structure over sedimentary habitats. These fragile ecosystems are threatened by anthropogenic disturbances that reduce their size and three‐dimensional structural complexity. We investigated how physical disturbance from boat moorings affects photosynthetic performance in the rhodolith Lithothamnion australe. Photosynthetic para ...
DOI:
10.1111/jpy.13080

19. Exposure of Typha domingensis to high concentrations of multi-metal and nutrient solutions: Study of tolerance and removal efficiency

Author:
Mufarrege, María De Las Mercedes; Di Luca, Gisela Alfonsina; Hadad, Hernán Ricardo; Maine, María Alejandra
Source:
Ecological engineering 2021 v.159 pp. 106118
ISSN:
0925-8574
Subject:
chlorophyll,   etc   ; Typha domingensis; macrophytes; metal tolerance; roots; sediments; wetlands;     Show all 7 Subjects
Abstract:
... This work studied the effects of nutrients on metal tolerance, removal efficiency, and metal accumulation in tissues of T. domingensis. This macrophyte was exposed to solutions of Cr(III) + Ni + Zn at extremely high concentrations. Treatments were metal combinations of 200 or 600 mg L⁻¹ of each metal with and without nutrients (N and P). Treatment 600 exhibited significantly lower final metal remo ...
DOI:
10.1016/j.ecoleng.2020.106118

20. Preventing the release of copper chlorophyllin from crop spray deposits on hydrophobic surfaces

Author:
Wang, Fengyan; Ckurshumova, Wenzi; Liu, Jun; Fefer, Michael; Pelton, Robert H.
Source:
Journal of colloid and interface science 2021 v.582 pp. 1149-1157
ISSN:
0021-9797
Subject:
chlorophyll,   etc   ; carboxymethylcellulose; chlorins; dyes; electrolytes; hydrophobicity; leaves; rain; water solubility;     Show all 9 Subjects
Abstract:
... The chlorophyll derivative copper chlorophyllin and related chlorins have promise as environmentally friendly agricultural chemicals, however, spray application is hindered by the propensity of dried spray deposits to wash off leaf surfaces during rain or irrigation.Polyelectrolyte complexes formed between anionic carboxymethyl cellulose and cationic polyamidoamine-epichlorohydrin can prevent the ...
DOI:
10.1016/j.jcis.2020.09.014