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  1. Article ; Online: Involvement of nanoparticles in mitigating plant's abiotic stress

    Fahima Dilnawaz / Amarendra N. Misra / Emilia Apostolova

    Plant Stress, Vol 10, Iss , Pp 100280- (2023)

    2023  

    Abstract: Abiotic stress globally has imposed the sternest environmental issues which enforce a significant impact on agricultural food production. Particularly, salinity, drought, heavy metal, and extreme high and low temperature are the principal components of ... ...

    Abstract Abiotic stress globally has imposed the sternest environmental issues which enforce a significant impact on agricultural food production. Particularly, salinity, drought, heavy metal, and extreme high and low temperature are the principal components of abiotic stresses. The majority of the agricultural land is altered by the stresses and impacted by the reduction of production. An environmental stress response is internally governed by intricate biochemical and molecular signal transduction events, that act in an orchestrated manner for determining the tolerance or sensitivity of the plants. With exposure to abiotic stress, plants respond by reprogramming the interconnected defense networks and metabolic pathways. The variety of agrarian, physiological practices and genetic engineering methods are adapted for promoting plant stress adaptability. With the advent of nanotechnology, its application in agriculture has emerged as a valuable tool to reach the goal of sustainable food production worldwide. Nanoparticles possess unique physicochemical properties which allow them to interact with biological systems in a specific manner in terms of size, large surface area, surface charge, etc. In this regard, numerous studies have been carried out to study the efficacious role of nanoparticles in strengthening plant stress resilience. In this review, we will discuss the molecular mechanisms governing the nanoparticle-mediated stress response to increase the potentiality of cultivated plants.
    Keywords Abiotic stress ; Nanoparticles ; Salt stress ; Drought ; Heavy metal ; Stress ; Plant ecology ; QK900-989
    Subject code 580
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: On the origin of the slow M–T chlorophyll a fluorescence decline in cyanobacteria: interplay of short-term light-responses

    Bernát, Gábor / Gábor Steinbach / Radek Kaňa / Govindjee / Amarendra N. Misra / Ondřej Prašil

    Photosynthesis research. 2018 May, v. 136, no. 2

    2018  

    Abstract: The slow kinetic phases of the chlorophyll a fluorescence transient (induction) are valuable tools in studying dynamic regulation of light harvesting, light energy distribution between photosystems, and heat dissipation in photosynthetic organisms. ... ...

    Abstract The slow kinetic phases of the chlorophyll a fluorescence transient (induction) are valuable tools in studying dynamic regulation of light harvesting, light energy distribution between photosystems, and heat dissipation in photosynthetic organisms. However, the origin of these phases are not yet fully understood. This is especially true in the case of prokaryotic oxygenic photoautotrophs, the cyanobacteria. To understand the origin of the slowest (tens of minutes) kinetic phase, the M–T fluorescence decline, in the context of light acclimation of these globally important microorganisms, we have compared spectrally resolved fluorescence induction data from the wild type Synechocystis sp. PCC 6803 cells, using orange (λ = 593 nm) actinic light, with those of mutants, ΔapcD and ΔOCP, that are unable to perform either state transition or fluorescence quenching by orange carotenoid protein (OCP), respectively. Our results suggest a multiple origin of the M–T decline and reveal a complex interplay of various known regulatory processes in maintaining the redox homeostasis of a cyanobacterial cell. In addition, they lead us to suggest that a new type of regulatory process, operating on the timescale of minutes to hours, is involved in dissipating excess light energy in cyanobacteria.
    Keywords Synechocystis sp. PCC 6803 ; acclimation ; autotrophs ; carotenoids ; chlorophyll ; decline ; energy ; fluorescence ; heat ; homeostasis ; microorganisms ; mutants
    Language English
    Dates of publication 2018-05
    Size p. 183-198.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 1475688-2
    ISSN 1573-5079 ; 0166-8595
    ISSN (online) 1573-5079
    ISSN 0166-8595
    DOI 10.1007/s11120-017-0458-8
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Frequently asked questions about chlorophyll fluorescence, the sequel

    Kalaji, Hazem M / Gert Schansker / Marian Brestic / Filippo Bussotti / Angeles Calatayud / Lorenzo Ferroni / Vasilij Goltsev / Lucia Guidi / Anjana Jajoo / Pengmin Li / Pasquale Losciale / Vinod K. Mishra / Amarendra N. Misra / Sergio G. Nebauer / Simonetta Pancaldi / Consuelo Penella / Martina Pollastrini / Kancherla Suresh / Eduardo Tambussi /
    Marcos Yanniccari / Marek Zivcak / Magdalena D. Cetner / Izabela A. Samborska / Alexandrina Stirbet / Katarina Olsovska / Kristyna Kunderlikova / Henry Shelonzek / Szymon Rusinowski / Wojciech Bąba

    Photosynthesis research. 2017 Apr., v. 132, no. 1

    2017  

    Abstract: Using chlorophyll (Chl) a fluorescence many aspects of the photosynthetic apparatus can be studied, both in vitro and, noninvasively, in vivo. Complementary techniques can help to interpret changes in the Chl a fluorescence kinetics. Kalaji et al. ( ... ...

    Abstract Using chlorophyll (Chl) a fluorescence many aspects of the photosynthetic apparatus can be studied, both in vitro and, noninvasively, in vivo. Complementary techniques can help to interpret changes in the Chl a fluorescence kinetics. Kalaji et al. (Photosynth Res 122:121–158, 2014a) addressed several questions about instruments, methods and applications based on Chl a fluorescence. Here, additional Chl a fluorescence-related topics are discussed again in a question and answer format. Examples are the effect of connectivity on photochemical quenching, the correction of F V /F M values for PSI fluorescence, the energy partitioning concept, the interpretation of the complementary area, probing the donor side of PSII, the assignment of bands of 77 K fluorescence emission spectra to fluorescence emitters, the relationship between prompt and delayed fluorescence, potential problems when sampling tree canopies, the use of fluorescence parameters in QTL studies, the use of Chl a fluorescence in biosensor applications and the application of neural network approaches for the analysis of fluorescence measurements. The answers draw on knowledge from different Chl a fluorescence analysis domains, yielding in several cases new insights.
    Keywords biosensors ; canopy ; chlorophyll ; energy ; fluorescence ; neural networks ; photochemistry ; photosystem II ; quantitative trait loci ; trees
    Language English
    Dates of publication 2017-04
    Size p. 13-66.
    Publishing place Springer Netherlands
    Document type Article
    Note Review
    ZDB-ID 1475688-2
    ISSN 1573-5079 ; 0166-8595
    ISSN (online) 1573-5079
    ISSN 0166-8595
    DOI 10.1007/s11120-016-0318-y
    Database NAL-Catalogue (AGRICOLA)

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    Order via subito

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