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Paweł Kafarski - One of the best experts on this subject based on the ideXlab platform.

  • Crotonic acid as a bioactive factor in carrot seeds (Daucus carota L.).
    Phytochemistry, 2005
    Co-Authors: Izabela Jasicka-misiak, Piotr Wieczorek, Paweł Kafarski
    Abstract:

    Water extracts from the carrot seed (Daucus carota L.) var. Perfekcja exhibit plant growth inhibitory Properties against cress, cucumber, onion and carrot in a dose-dependant manner. This property results from the action of low-and high-molecular components of the extract. The low-molecular component was identified as crotonic acid ((E)-2-butenoic acid). Its presence was also confirmed in other late varieties of carrot. The determined strong Herbicidal Properties of crotonic acid and its availability after release to soil combined with its high level in seeds suggest that it might be considered as an allelopathic and autotoxic factor in the seeds.

  • Herbicidal pyridyl derivatives of aminomethylene-bisphosphonic acid inhibit plant glutamine synthetase.
    Journal of Agricultural and Food Chemistry, 2004
    Co-Authors: Agnieszka Obojska, Paweł Kafarski, Barbara Lejczak, Lukasz Berlicki, Milvia Chicca, Giuseppe Forlani
    Abstract:

    A series of aminomethylene-bisphosphonic acid derivatives, previously synthesized and shown to be endowed with Herbicidal Properties, were evaluated as potential inhibitors of plant glutamine synthetase. The cytosolic form of the enzyme was partially purified from rice cultured cells and assayed in the presence of millimolar concentrations of the compounds by means of three different assay methods, respectively measuring the hemibiosynthetic, the transferase, and the full biosynthetic reactions. Several compounds were found to exert a remarkable inhibition, with I50 values similar to those obtained under the same conditions with a well-established inhibitor of glutamine synthetase, the herbicide phosphinothricin. Contrary to the reference compound, enzyme kinetics accounted for a reversible inhibition mechanism. The biological activity of the most active derivatives was further characterized by measuring free glutamine levels in cell suspension rice cultures following treatment with the inhibitors. Result...

  • Herbicidal Derivatives of Aminomethylenebisphosphonic Acid. Part IV. Hydroxyalkylidenebisphosphonates, Iminomethylenebisphosphonates and Ureidomethylenebisphosphonates.
    Journal of plant growth regulation, 1999
    Co-Authors: Alexey L. Chuiko, Miron O. Lozinsky, Izabela Jasicka-misiak, Paweł Kafarski
    Abstract:

    Derivatives of aminomethylenebisphosphonic acids constitute a class of promising herbicides. Replacement of the amino group by hydroxyl, ureido, thioureido, or imino moieties leads to compounds of significant Herbicidal Properties. This indicates that protonated amino function is not a requirement for phytotoxic action of bisphosphonates.

  • Herbicidal Derivatives of Aminomethylenebisphosphonic Acid. Part III. Structure—Activity Relationship
    Journal of Plant Growth Regulation, 1997
    Co-Authors: Paweł Kafarski, Barbara Lejczak, Giuseppe Forlani, R. Gancarz, C. Torreilles, J. Grembecka, A. Ryczek, Piotr Wieczorek
    Abstract:

    Derivatives of aminomethylenebisphosphonic acids constitute a class of promising herbicides. More than 40 N-substituted aminomethylenephosphonic acids were synthesized and evaluated for their Herbicidal activity on common cress (Lepidium sativum L.) and cucumber (Cucumis sativus L.). Some of the tested compounds were found to exhibit strong Herbicidal Properties being equal in activity with the popular herbicide glyphosate as well as parent N-pyridylaminomethylenephosphonic acids. N-Substituted iminodi(methylenephosphonic) acids, which may be considered as close analog of glyphosate, were inactive toward test plants.

Raúl De Celis - One of the best experts on this subject based on the ideXlab platform.

  • Sorption, persistence, and leaching of the allelochemical umbelliferone in soils treated with nanoengineered sorbents
    Scientific Reports, 2019
    Co-Authors: Marion Real, Rocío López-cabeza, B Gamiz, Raúl De Celis
    Abstract:

    Coumarins represent an important family of allelochemicals with fungicidal, bactericidal, insecticidal, nematicidal, and Herbicidal Properties. Like for other allelochemicals, the short persistence of coumarins in soils can reduce their biological activity and hamper their application as environmentally friendly agrochemicals. We evaluated the sorption of the coumarin umbelliferone by eight soils and six sorbent materials, and then selected two nanoengineered sorbents, hexadecyltrimethylammonium-modified Arizona montmorillonite (SA-HDTMA) and olive-mill waste biochar (BC), to assess the effect of their addition to two distinct soils on umbelliferone sorption, persistence, and leaching. Umbelliferone was sorbed to a greater extent by the acid soils (A1-A2, Kd > 4.0 L kg−1) than by the alkaline soils (B1-B6, Kd 

Piotr Wieczorek - One of the best experts on this subject based on the ideXlab platform.

  • Crotonic acid as a bioactive factor in carrot seeds (Daucus carota L.).
    Phytochemistry, 2005
    Co-Authors: Izabela Jasicka-misiak, Piotr Wieczorek, Paweł Kafarski
    Abstract:

    Water extracts from the carrot seed (Daucus carota L.) var. Perfekcja exhibit plant growth inhibitory Properties against cress, cucumber, onion and carrot in a dose-dependant manner. This property results from the action of low-and high-molecular components of the extract. The low-molecular component was identified as crotonic acid ((E)-2-butenoic acid). Its presence was also confirmed in other late varieties of carrot. The determined strong Herbicidal Properties of crotonic acid and its availability after release to soil combined with its high level in seeds suggest that it might be considered as an allelopathic and autotoxic factor in the seeds.

  • Herbicidal Derivatives of Aminomethylenebisphosphonic Acid. Part III. Structure—Activity Relationship
    Journal of Plant Growth Regulation, 1997
    Co-Authors: Paweł Kafarski, Barbara Lejczak, Giuseppe Forlani, R. Gancarz, C. Torreilles, J. Grembecka, A. Ryczek, Piotr Wieczorek
    Abstract:

    Derivatives of aminomethylenebisphosphonic acids constitute a class of promising herbicides. More than 40 N-substituted aminomethylenephosphonic acids were synthesized and evaluated for their Herbicidal activity on common cress (Lepidium sativum L.) and cucumber (Cucumis sativus L.). Some of the tested compounds were found to exhibit strong Herbicidal Properties being equal in activity with the popular herbicide glyphosate as well as parent N-pyridylaminomethylenephosphonic acids. N-Substituted iminodi(methylenephosphonic) acids, which may be considered as close analog of glyphosate, were inactive toward test plants.

  • Mode of action of Herbicidal derivatives of aminomethylenebisphosphonic acid. I. Physiologic activity and inhibition of anthocyanin biosynthesis
    Journal of Plant Growth Regulation, 1996
    Co-Authors: Barbara Lejczak, Giuseppe Forlani, B. Boduszek, P. Kafarski, H. Wojtasek, Piotr Wieczorek
    Abstract:

    N -Pyridylaminomethylenebisphosphonic acids constitute a class of promising herbicides. Since their mode of action at the cellular level is still poorly understood, we studied the influence of N -pyridylaminomethylenebisphosphonic acids on plant growth, at the whole plant and undifferentiated tissue levels, using seedlings and cell suspension cultures of mono- and dicotyledonous species. These compounds exhibited strong Herbicidal Properties, being equipotent with the popular herbicide glyphosate. Since they also depressed buckweed anthocyanin biosynthesis, the shikimate pathway could represent a site of action of N -pyridylaminomethylenebisphosphonic acids.

Marion Real - One of the best experts on this subject based on the ideXlab platform.

  • Sorption, persistence, and leaching of the allelochemical umbelliferone in soils treated with nanoengineered sorbents
    Scientific Reports, 2019
    Co-Authors: Marion Real, Rocío López-cabeza, B Gamiz, Raúl De Celis
    Abstract:

    Coumarins represent an important family of allelochemicals with fungicidal, bactericidal, insecticidal, nematicidal, and Herbicidal Properties. Like for other allelochemicals, the short persistence of coumarins in soils can reduce their biological activity and hamper their application as environmentally friendly agrochemicals. We evaluated the sorption of the coumarin umbelliferone by eight soils and six sorbent materials, and then selected two nanoengineered sorbents, hexadecyltrimethylammonium-modified Arizona montmorillonite (SA-HDTMA) and olive-mill waste biochar (BC), to assess the effect of their addition to two distinct soils on umbelliferone sorption, persistence, and leaching. Umbelliferone was sorbed to a greater extent by the acid soils (A1-A2, Kd > 4.0 L kg−1) than by the alkaline soils (B1-B6, Kd 

Giuseppe Forlani - One of the best experts on this subject based on the ideXlab platform.

  • Herbicidal pyridyl derivatives of aminomethylene-bisphosphonic acid inhibit plant glutamine synthetase.
    Journal of Agricultural and Food Chemistry, 2004
    Co-Authors: Agnieszka Obojska, Paweł Kafarski, Barbara Lejczak, Lukasz Berlicki, Milvia Chicca, Giuseppe Forlani
    Abstract:

    A series of aminomethylene-bisphosphonic acid derivatives, previously synthesized and shown to be endowed with Herbicidal Properties, were evaluated as potential inhibitors of plant glutamine synthetase. The cytosolic form of the enzyme was partially purified from rice cultured cells and assayed in the presence of millimolar concentrations of the compounds by means of three different assay methods, respectively measuring the hemibiosynthetic, the transferase, and the full biosynthetic reactions. Several compounds were found to exert a remarkable inhibition, with I50 values similar to those obtained under the same conditions with a well-established inhibitor of glutamine synthetase, the herbicide phosphinothricin. Contrary to the reference compound, enzyme kinetics accounted for a reversible inhibition mechanism. The biological activity of the most active derivatives was further characterized by measuring free glutamine levels in cell suspension rice cultures following treatment with the inhibitors. Result...

  • Herbicidal Derivatives of Aminomethylenebisphosphonic Acid. Part III. Structure—Activity Relationship
    Journal of Plant Growth Regulation, 1997
    Co-Authors: Paweł Kafarski, Barbara Lejczak, Giuseppe Forlani, R. Gancarz, C. Torreilles, J. Grembecka, A. Ryczek, Piotr Wieczorek
    Abstract:

    Derivatives of aminomethylenebisphosphonic acids constitute a class of promising herbicides. More than 40 N-substituted aminomethylenephosphonic acids were synthesized and evaluated for their Herbicidal activity on common cress (Lepidium sativum L.) and cucumber (Cucumis sativus L.). Some of the tested compounds were found to exhibit strong Herbicidal Properties being equal in activity with the popular herbicide glyphosate as well as parent N-pyridylaminomethylenephosphonic acids. N-Substituted iminodi(methylenephosphonic) acids, which may be considered as close analog of glyphosate, were inactive toward test plants.

  • Mode of action of Herbicidal derivatives of aminomethylenebisphosphonic acid. I. Physiologic activity and inhibition of anthocyanin biosynthesis
    Journal of Plant Growth Regulation, 1996
    Co-Authors: Barbara Lejczak, Giuseppe Forlani, B. Boduszek, P. Kafarski, H. Wojtasek, Piotr Wieczorek
    Abstract:

    N -Pyridylaminomethylenebisphosphonic acids constitute a class of promising herbicides. Since their mode of action at the cellular level is still poorly understood, we studied the influence of N -pyridylaminomethylenebisphosphonic acids on plant growth, at the whole plant and undifferentiated tissue levels, using seedlings and cell suspension cultures of mono- and dicotyledonous species. These compounds exhibited strong Herbicidal Properties, being equipotent with the popular herbicide glyphosate. Since they also depressed buckweed anthocyanin biosynthesis, the shikimate pathway could represent a site of action of N -pyridylaminomethylenebisphosphonic acids.