Herbicides, Inhibitors of Photosynthesis at Photosystem<scp>II</scp>

Oettmeier, Walter

doi:10.1002/047126363x.agr129

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…PSII herbicides include S-triazines, triazinones, uracils, ureas, phenylcarbamates, anilides, cyanophenols, and dinitrophenols. 18) Since the introduction of the triazine herbicide atrazine in the late 1950s, PSII herbicides have been widely used for weed control in many crop species. In Australia, atrazine and simazine control weeds in canola (triazine tolerant), and the triazinone metribuzin controls weeds in lupin crops.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic basis for synergism of 2,4-D amine and metribuzin in <i>Avena sterilis</i>

et al. 2020

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The combination of herbicides with different modes of action has been adopted not only to improve weed control but also to increase the environmental sustainability of plant-protection products. In this study, we showed a synergistic effect of the auxin herbicide 2,4-D amine with the PSII-inhibiting herbicide metribuzin to control the global grass weed wild oat (Avena sterilis) population and investigated the underlying mechanisms. Pretreatment with 2,4-D amine did not change the foliar absorption of metribuzin but did increase metribuzin translocation to the roots and new leaves, although enhancement of the metribuzin metabolism was also observed. Considering that the expression level of the target site psbA gene is significantly higher in leaves than in roots, increased metribuzin translocation to new leaves is likely the major cause of the observed synergism, even though enhanced metribuzin metabolism may offset the metribuzin efficacy. This is the first report on the synergistic mechanism between 2,4-D amine and metribuzin in weed control.

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Section: Introductionmentioning

confidence: 99%

Mechanistic basis for synergism of 2,4-D amine and metribuzin in <i>Avena sterilis</i>

et al. 2020

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“…Blockage of the PQ reduction by bound herbicide results in the lack of electron delivery into PSI and the carbon fixation cycle. This increases recombination processes, which generate ROS that cause serious damage to PSII and thereby may contribute to the death of the plant (Oettmeier 2003 ).…”

Section: Chemical Reactionsmentioning

confidence: 99%

Solar energy conversion by photosystem II: principles and structures

et al. 2023

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Photosynthetic water oxidation by Photosystem II (PSII) is a fascinating process because it sustains life on Earth and serves as a blue print for scalable synthetic catalysts required for renewable energy applications. The biophysical, computational, and structural description of this process, which started more than 50 years ago, has made tremendous progress over the past two decades, with its high-resolution crystal structures being available not only of the dark-stable state of PSII, but of all the semi-stable reaction intermediates and even some transient states. Here, we summarize the current knowledge on PSII with emphasis on the basic principles that govern the conversion of light energy to chemical energy in PSII, as well as on the illustration of the molecular structures that enable these reactions. The important remaining questions regarding the mechanism of biological water oxidation are highlighted, and one possible pathway for this fundamental reaction is described at a molecular level.

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“…Inhibition of photosynthesis could result in slow starvation of the plant and cessation of starch translocation; however rapid death occurs perhaps from the production of secondary toxic substances. Herbicides of photosystem II belong to the following Modes of Herbicide Action DOI: http://dx.doi.org/10.5772/intechopen.105356 chemical classes: s-triazines, triazinone, uracil, urea, phenyl carbamates, anilide, cyanophenols, dinitrophenol, which are classified into three different groups 5, 6, and 7 on the basis of site of action [21]. The commonly used herbicides having this mode of action are atrazine, simazine, metribuzin, hexazinone, terbacil, bromoxynil, bromacil, pyrazone, bentazon, diuron, and linuron.…”

Section: Photosynthesis Inhibitorsmentioning

confidence: 99%

Modes of Herbicide Action

Bagale¹

2023

New Insights in Herbicide Science

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Weed Management is one of the most important crop intervention practice to counter crop loss. Different physical, mechanical, biological, and chemical methods are employed for the successful management of weeds. Among these chemical weed management practices focus on managing weeds using several chemical formulations which are commonly known as herbicides. Herbicides control the weed species through interference, mitigation, and disruption of the biochemical and physical processes of a cell. When herbicides are applied to a plant, it gets absorbed through plant surfaces and gets translocated to the specific site of action where it produces toxicity in the physiological and biochemical processes and ultimately check the growth and development of plant species. The sequential process from the introduction of herbicides to till it kills a plant is known as herbicides modes of action. The herbicides modes of action can be studied on nine different headings where the chemical group present in each herbicide acts on specific sites and interferes with the normal functioning of such sites ultimately checking the growth and development of a plant. This chapter is aimed at decoding the specific herbicide action in relation to its chemical family, translocation, action mechanism, and injury produced in the weed species.

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Herbicides, Inhibitors of Photosynthesis at PhotosystemII

Cited by 7 publications

References 32 publications

Mechanistic basis for synergism of 2,4-D amine and metribuzin in <i>Avena sterilis</i>

Mechanistic basis for synergism of 2,4-D amine and metribuzin in <i>Avena sterilis</i>

Solar energy conversion by photosystem II: principles and structures

Modes of Herbicide Action

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