Temat: chlorophyll concentration - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Wstępne badania aktywności fotosyntezy jednorocznych roślin wybranych odmian winorośli
Preliminary studies on photosynthetic activity of one-year old plants of grapevine cultivars
Autorzy:: Borowiak, Klaudia
Korszun, Stanisława
Powiązania:: https://bibliotekanauki.pl/articles/2198031.pdf
Data publikacji:: 2011-03-31
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: winorośl
intensywność fotosyntezy netto
przewodność aparatów szparkowych
transpiracja
zawartość chlorofilu
powierzchnia liści
grapevine
net photosynthetic rate
stomatal conductance
internal CO2 concentration
transpiration rate
chlorophyll content
leaf area
Opis:: Celem przeprowadzonego doświadczenia było określenie różnic w intensywności procesu fotosyntezy pomiędzy wybranymi odmianami jednorocznych roślin winorośli o różnym poziomie plonowania. Metodą nieinwazyjną dokonano pomiarów takich parametrów jak: intensywność fotosyntezy netto, przewodność aparatów szparkowych, stężenie wewnętrzne CO2 i intensywność transpiracji. Wykonano również dodatkowe pomiary parametrów charakteryzujących stan fizjolo¬giczny roślin — zawartości chlorofilu, powierzchni liścia, specyficznej powierzchni liścia. Badania wykonano dwukrotnie na roślinach jednorocznych, w okresie wegetacyjnym 2010 roku. Wyniki badań powiązano ze średnim plonem z jednej rośliny w wieku produkcyjnym. Stwierdzono istotne różnice w poziomie intensywności fotosyntezy pomiędzy odmianami, jak również różnice w poziomach pozostałych badanych parametrów. Wykazano, że wysoka zawartość chlorofilu nie zawsze jest powiązana z poziomem aktywności fotosyntezy. Świadczy to o wysokiej wydajności fotosyntezy dla odmian o niskiej zawartości chlorofilu i odwrotnie. Poziom intensywności fotosyntezy powiązany był z powierzchnią liści. Na podstawie przeprowadzonych wstępnych badań jednorocznych roślin winorośli stwierdzono, że wysoki poziom badanych parametrów (tj. intensywność fotosyntezy, zawartość chlorofilu) odmiany Vertes Csillaga może być powiązany z dużym plonowaniem roślin w wieku produkcyjnym.
The aim of the presented study was determination of differences in photosynthetic activity between ten grapevine cultivars with various level of berries yield. The analysis of photosynthetic rate, stomatal conductance, internal CO2 concentration, transpiration rate was done on one-year old plants. The additional measurements were performed for chlorophyll content, leaf area and specific leaf area. The measurements were carried out twice during the 2010 growing season. The results were related to the mean level of grape yield of mature plants. Significant differences in photosynthetic activity were noticed between the cultivars. The other measured parameters were significantly differentiated, as well. The high chlorophyll content has not been always connected with high photosynthetic activity. It suggests high photosynthesis efficiency for the cultivars with low chlorophyll content. High photosynthetic rate was usually related to high leaf area. High photosynthetic activity of the cv. Vertes Csillaga was probably connected with high grape yield of the cultivar.
Źródło:: Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2011, 259; 179-191
0373-7837
2657-8913
Pojawia się w:: Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Long-term water quality monitoring using Sentinel-2 data, Głuszyńskie Lake case study
Autorzy:: Ciężkowski, Wojciech
Frąk, Magdalena
Kardel, Ignacy
Kościelny, Marcin
Chormański, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/36055080.pdf
Data publikacji:: 2022
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: sentinel-2
inland water
biological oxygen demand
BOD
dissolved organic carbon
DOC
electrical conductivity
EC
chlorophyll concentration
CHL
Opis:: This study shows the results of long-term inland water monitoring using Sentinel-2 data for Głuszyńskie Lake in the years 2015–2022. Four water quality parameters: biological oxygen demand (BOD), dissolved organic carbon (DOC), chlorophyll concentration (CHL) and electrical conductivity (EC) were calculated according to formulas found in the literature. The results were validated based on measurements conducted in 2021 and 2022, where for BOD, DOC and CHL high determination coefficients (0.77 and 0.79) were observed, and the EC determination coefficient was equal to 0.45. The results show that empirical formulas can be used for qualitative analyses of inland water quality, while for quantitative analyses more extensive field work needs to be performed.
Źródło:: Scientific Review Engineering and Environmental Sciences; 2022, 31, 4; 283-293
1732-9353
Pojawia się w:: Scientific Review Engineering and Environmental Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Summer mesozooplankton community of Moller Bay (Novaya Zemlya Archipelago, Barents Sea)
Autorzy:: Dvoretsky, V.G.
Dvoretsky, A.G.
Powiązania:: https://bibliotekanauki.pl/articles/49179.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: mesozooplankton
biomass
vertical distribution
water temperature
salinity
chlorophyll a concentration
Barents Sea
Moller Bay
Novaya Zemlya Archipelago
Źródło:: Oceanologia; 2013, 55, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Spatio-temporal variability of the phytoplankton biomass in the Levantine basin between 2002 and 2015 using MODIS products
Autorzy:: El Hourany, R.
Fadel, A.
Gemayel, E.
Abboud-Abi Saab, M.
Faour, G.
Powiązania:: https://bibliotekanauki.pl/articles/48550.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: spatio-temporal variability
phytoplankton biomass
remote sensing
sea surface temperature
chlorophyll a concentration
phytoplankton bloom
Mediterranean Sea
Opis:: The Levantine basin in the Eastern Mediterranean Sea is subject to spatial and seasonal variations in primary production and physical-chemical properties both on a short and long-term basis. In this study, the monthly means of daily MODIS product images were averaged between 2002 and 2015, and used to characterize the phytoplankton blooms in different bioregions of the Levantine basin. The selected products were the sea surface temperature (SST), the chlorophyll-a concentration (Chl-a), the diffuse attenuation coefficient for downwelling irradiance at 490 nm (Kd_490) and the colored dissolved organic matter index (CDOM_ index). Our results showed that phytoplankton blooms were spatially and temporally variable. They occurred in late autumn at the Nile Delta, in early spring and late summer at the eastern coastline, and in spring at the northeastern coastline. The northern coastline and the open water had a common bloom occurring in winter. The Nile Delta was found to be the most productive area of the Levantine basin showing high Chl-a. Kd_490 and Chl-a present a parallel co-variation indicating a dominance of Case 1 waters in the Levantine basin. The CDOM_index shows a phase shift with the Chl-a fluctuation. A strong inverse correlation was observed between both Chl-a and CDOM_index with SST, connoting an indirect relation represented by a depression of CDOM in summer by photobleaching, and a suppression of the chlorophyll-a concentration due to water stratification, together with nutrient stress. An overestimation of the Chl-a values had been signaled by the use of the CDOM_index, suggesting a correction plan in a latter study.
Źródło:: Oceanologia; 2017, 59, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Alleviation of NaCl stress in summer squash "Eskandrani" by foliar application of salicylic acid
Autorzy:: Elwan, M.W.M.
El-Shatoury, R.S.A.
Powiązania:: https://bibliotekanauki.pl/articles/1846.pdf
Data publikacji:: 2014
Wydawca:: Instytut Ogrodnictwa
Tematy:: salinity stress
summer squash
Cucurbita pepo
Eskandrani cultivar
foliar application
salicylic acid
foliar spray
chlorophyll
sodium concentration
photosynthetic pigment
plant growth
yield
Źródło:: Journal of Horticultural Research; 2014, 22, 2
2300-5009
Pojawia się w:: Journal of Horticultural Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Influence of non-photosynthetic pigments on the measured quantum yield of photosynthesis
Autorzy:: Ficek, D.
Majchrowski, R.
Ostrowska, M.
Wozniak, B.
Powiązania:: https://bibliotekanauki.pl/articles/47492.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: marine phytoplankton
pigment
quantum yield
chlorophyll a
phytoplankton pigment
bio-optical modelling
concentration
sea
water column
photosynthesis
Opis:: The aim of this work was to assess the effect of non-photosynthetic (photoprotecting) pigments on the measured quantum yield of photosynthesis in the sea. The energy absorbed by these pigments is not utilised during photosynthesis. As a result, the measured yield of this process, i.e. the photosynthetic yield referred to the total energy absorbed by all phytoplankton pigments, is less than the actual quantum yield of photosynthesis, i.e. the yield referred to the energy absorbed by photosynthetic pigments only. The model of the absorption properties of marine phytoplankton derived by the authors (see Woźniak et al. 2000, this volume) was employed to determine the relevant contributions of photosynthetic and non-photosynthetic pigments to the total energy absorbed by phytoplankton in different trophic types of seas and at different depths in the water column. On this basis the non-photosynthetic pigment absorption factor fa, which describes the relation between the true and measured quantum yields of photosynthesis, could be characterised. The analysis shows that fa varies in value from 0.33 to 1, and that it depends on the trophic type of sea and the depth in the water column. The values of this factor are usually highest in eutrophic waters and decrease as waters become progressively more oligotrophic. It is also characteristic of fa that it increases with increasing depth in the sea.
Źródło:: Oceanologia; 2000, 42, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Average nutrient and chlorophyll distributions in the Western Mediterranean: RADMED project
Autorzy:: Garcia-Martinez, M.C.
Vargaz-Yanez, M.
Moya, F.
Santiago, R.
Munoz, M.
Reul, A.
Ramirez, T.
Balbin, R.
Powiązania:: https://bibliotekanauki.pl/articles/48926.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: climate change
water column
nutrient concentration
nutrient transport
chlorophyll
Mediterranean Sea
RADMED project
Źródło:: Oceanologia; 2019, 61, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Influence of the winter phytoplankton bloom on the settled material in a temperate shallow estuary
Autorzy:: Guinder, V.A.
Lopez-Abbate, M.C.
Berasategui, A.A.
Negrin, V.L.
Zapperi, G.
Pratolongo, P.D.
Fernandez Severini, M.D.
Popovich, C.A.
Powiązania:: https://bibliotekanauki.pl/articles/47931.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: phytoplankton bloom
chlorophyll a
sediment trap
resuspension
shallow estuary
pelagic food web
nutrient concentration
particulate organic matter
coastal environment
Źródło:: Oceanologia; 2015, 57, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Spatial distribution of biological and physical sediment parameters in the Western Gulf of Gdansk
Autorzy:: Huzarska, K.
Powiązania:: https://bibliotekanauki.pl/articles/48994.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: spatial distribution
surface sediment
physical property
biological activity
microphytobenthos
primary production
extracellular polymeric substance
chlorophyll a concentration
carbohydrate concentration
Źródło:: Oceanologia; 2013, 55, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: The impact of turbulence and phytoplankton dynamics on foam formation, seawater viscosity and chlorophyll concentration in the Eastern English Channel
Autorzy:: Kesaulya, I.
Leterme, S.C.
Mitchell, J.G.
Seuront, L.
Powiązania:: https://bibliotekanauki.pl/articles/48511.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: chlorophyll a concentration
phytoplankton
turbulence
plankton
foam
foam formation
spring bloom
rheology
viscosity
Phaeocystis globosa
sea water
Opis:: The space-time dynamics of chlorophyll a concentration and seawater excess viscosity has been investigated in the hydrographically contrasting inshore and offshore water masses of the eastern English Channel. This was done during the phytoplankton spring bloom dominated by Phaeocystis globosa before and after the very large-scale formation of foam induced by an increase in wind-driven turbulence and the related wave breakings. The results suggest that the dynamics of chlorophyll a concentration and seawater excess viscosity are differentially controlled by the formation of foam through the intensity of the spring bloom and wind-generated turbulence.
Źródło:: Oceanologia; 2008, 50, 2; 167-182
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Effect of zinc, iron and manganese fertilization on concentrations of these metals in the stem and leaves of soybean and on the chlorophyll content in leaves during the reproductive development stages
Autorzy:: Kobraee, S.
Powiązania:: https://bibliotekanauki.pl/articles/16128.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: zinc fertilization
iron fertilization
manganese fertilization
metal concentration
zinc concentration
iron concentration
manganese concentration
stem
leaf
soybean
chlorophyll content
reproductive stage
development stage
flowering
Opis:: In order to investigate the effect of zinc, iron and manganese fertilization on Zn, Fe and Mn concentrations in the stem and leaves and on the chlorophyll content in leaves of soybean at different reproductive growth stages, two experiments were conducted on a research field of the Islamic Azad University of Kermanshah, Iran, during the 2010 and 2011 growing seasons. The experimental design consisted of a factorial experiment based on the randomized complete block method with three replicates. The treatments included three levels of Zn (0, 20 and 40 kg ha-1), Fe (0, 25 and 50 kg ha-1), and Mn (0, 20 and 40 kg ha-1), all applied to soil. At 30, 60, 90 and 120 days after sowing (DAS), the SPAD readings were done on five leaves from each experimental plot for all replicates. Five plants were randomly selected from each plot at the flowering, pod setting, seed filling and maturity stages. Samples washed with distilled water were dried, weighed and incinerated at 550°C. Finally, the Zn, Fe and Mn concentrations were determined by Atomic Absorption Spectrometry. The results indicated that zinc application had significantly affected Zn, Fe and Mn concentrations in soybean stems at all the sampling times except for the soybean stem Mn concentration at the maturity stage. In contrast, the concentration of Mn at seed filling was unaffected by iron fertilization. Also, the maximum Fe concentration in soybean stems resulting from zinc application was achieved in Zn20 treatment. The highest Zn and Mn concentrations in leaves were recorded when iron was applied in smaller amounts. Furthermore, zinc, iron and manganese applications had significant effects on the leaf chlorophyll concentration during all the growth stages of soybean plants. In addition, increased iron and manganese fertilization raised the soybean leaf chlorophyll concentrations in all the samples. The maximum chlorophyll concentration in soybean leaves at 60 DAS was recorded in Zn20Fe50, Zn20Mn40 and Fe50Mn40 treatments (34.7, 34.0 and 35.2, respectively).
Źródło:: Journal of Elementology; 2016, 21, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Influence of coastal upwelling on chlorophyll a concentration in the surface water along the Polish coast of the Baltic Sea
Autorzy:: Krezel, A.
Szymanek, L.
Kozlowski, L.
Szymelfenig, M.
Powiązania:: https://bibliotekanauki.pl/articles/49088.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: surface water
chlorophyll a
satellite remote sensing
concentration
coastal upwelling
Baltic Sea
Polish coast
Opis:: Space-time variations in chlorophyll a (Chl a) concentrations in the surface water of upwelling regions along the Polish coast of the Baltic Sea were analysed. Carried out between 1998 and 2002 in the warmer season (from April till October), the measurements were targeted mainly at the Hel upwelling. Satellite-derived sea surface temperature (AVHRR) and Chl a data (SeaWiFS) were used. Generally speaking, the Chl a concentration increased in the upwelling plume, except along the Hel Peninsula, where two scenarios took place: a reduction in Chl a concentration in spring and an increase in autumn.
Źródło:: Oceanologia; 2005, 47, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Development and dynamics of a coastal sub-surface phytoplankton bloom in the Southwest Kattegat, Baltic Sea
Autorzy:: Lund-Hansen, L.C.
Powiązania:: https://bibliotekanauki.pl/articles/48742.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: chlorophyll a
dymanics
Kattegat
subsurface phytoplankton
concentration
development
bloom
Baltic Sea
phytoplankton
Opis:: The study was based on CTD-casts performed on 5 consecutive days at 7 positions along a shallow- to deep-water transect during the spring bloom in the southwest Kattegat. The development, dynamics and fate of the sub-surface chlorophyll maximum (SCM) are described. The SCM developed at a constant rate of 1.4 mg chl a m−3 d−1, which is equal to a carbon fixation rate of 49.0 mgC m−3 d−1. The SCM developed at 6 m depth at low irradiance levels (10–43.0 μE m−2 s−1). Chl a concentrations reached up to 23 mg chl a m−3 in the centre of the SCM. Growth rates in the SCM were estimated at 0.82 d−1. The water column was only weakly stratified, with nutrients in excess in the whole of the water column. The SCM was relocated vertically to depths below the photic zone by wind-induced advection between the bay and the outer Kattegat. There were indications of a horizontal relocation of the SCM by an internal standing wave. Application of high spatial and temporal resolution made it possible to estimate key SCM parameters, such as growth rates [mg chl a m−3 d−1] and carbon fixation rate [mgC m−3 d−1], on the basis of chl a variations in time and space.
Źródło:: Oceanologia; 2006, 48, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Green islands develop in a leaf age-dependent manner during black spot disease of Brassica juncea
Autorzy:: Macioszek, V.K.
Rousseau, K.
Pludowska, P.
Kononowicz, A.K.
Powiązania:: https://bibliotekanauki.pl/articles/81206.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
Brassica juncea
black spot disease
Alternaria brassicicola
infection
green island
leaf age
chlorophyll a
chlorophyll b
carotenoid concentration
polyphenol
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Mathematical description of vertical algal accessory pigment distributions in oceans – a brief presentation
Autorzy:: Majchrowski, R.
Ostrowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/49083.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: accessory pigment
bio-optical modelling
chlorophyll a
concentration
investigation
marine alga
mathematical description
ocean
optical depth
photoprotecting pigment
photosynthetic apparatus
photosynthetic pigment
pigment
sea
trophic index
vertical distribution
water
Opis:: A straightforward mathematical expression for describing the vertical distributions of algal accessory pigments in oceans is presented. To this end ca 1500 empirical datasets of accessory pigment depth profiles gathered during some 200 research cruises in different oceanic regions were analysed. These data were retrieved from the bio-optical databases of SeaBASS and U.S. JGOFS published on the Internet. The statistical relationships were analysed between the concentrations of accessory pigments and the trophic indices of waters, as measured by the surface concentrations of chlorophyll a and the optical depths in different oceanic regions. A mathematical expression was established and formulas based on it were found, approximating the relations between the vertical distributions of accessory pigments and the chlorophyll a concentration. These formulas can be used to model the species composition of algae in different parts of the ocean and in remote sensing algorithms.
Źródło:: Oceanologia; 2009, 51, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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