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The natural herbicide rhein targets photosystem I
Twitty, Alyssa ; Barnes, Hamlin ; Levy, Noa , et al. Sci. Rep.,2024,14,32109. DOI: 10.1038/s41598-024-83891-6 PubMed ID: 39738507
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Abstract: The natural anthraquinone rhein has been identified as a novel herbicide with a potentially new mode of action using a generative AI system for functional molecules discovery. Its herbicidal activity was light-dependent and resulted in rapid burndown symptoms on leaves of treated plants. Rhein interferes with photosynthesis by acting as an electron diverter at the level of photosystem I (PSI). The redox potential of rhein suggests that it accepts electrons between P700 and NADP+ of PSI. This is consistent with the redox potential of rhein that enables it to accept electrons from flavoproteins. Ferredoxin-NAPD+ reductase is a flavoprotein with a redox potential near that of rhein. Thus, it is currently hypothesized that rhein acts as an electron acceptor at or near the PSI Ferredoxin-NAPD+ reductase to form a radical and generate reactive oxygen species that drive the light-dependent herbicidal effect which is observed in treated plants from greenhouse trials.
Keywords: AI ; Artificial intelligence ; Generative AI ; Mode of action ; Photosystem I ; Anthraquinone ; Natural product ; Light-dependent ; Electron acceptor ; ROS ; Flavoprotein
Purchased from AmBeed: 478-43-3
CAS No. : | 478-43-3 | MDL No. : | MFCD00009618 |
Formula : | C15H8O6 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | FCDLCPWAQCPTKC-UHFFFAOYSA-N |
M.W : | 284.22 | Pubchem ID : | 10168 |
Synonyms : |
Rheic Acid;Rhubarb yellow;Rheic acid, Cassic acid;Rheinic Acid;NSC 38629;Monorhein
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Chemical Name : | 4,5-Dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-carboxylic acid |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.