Derivatives of diterpen labdane-8α,15-diol as photosynthetic inhibitors in spinach chloroplasts and growth plant inhibitors
| Autor: | Félix Morales-Flores, Blas Lotina-Hennsen, Beatriz King-Díaz, María Isabel Aguilar |
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| Rok vydání: | 2013 |
| Předmět: |
Chlorophyll
Chloroplasts Biophysics Photosynthesis Lolium perenne Labdane chemistry.chemical_compound Solanum lycopersicum Plant Growth Regulators Spinacia oleracea Botany Lolium Radiology Nuclear Medicine and imaging Trifolium alexandrinum Biomass Cyclodextrins Radiation Radiological and Ultrasound Technology biology Herbicides Chlorophyll A biology.organism_classification Croton Chloroplast Plant Leaves chemistry Trifolium Diterpenes |
| Zdroj: | Journal of photochemistry and photobiology. B, Biology. 125 |
| ISSN: | 1873-2682 |
| Popis: | In a search of new efficient herbicides of natural origin, four derivatives were prepared from labdane-8α,15-diol (1) and 15-O-acetyl-8α-hydroxy labdane (2) isolated from Croton ciliatoglanduliferus. Their inhibitory activity on photosynthetic electron transport on fresh, broken spinach chloroplasts and on the growth of plants were determined. Derivative 15-O-benzoyl-8α-hydroxy labdane (5) was seven times more active than 2 as reaction Hill inhibitor. Complex of 5 with the adjuvant 2-hydroxypropyl-β-cyclodextrin (5:HPB) (200 μM) was sprayed on Physalys ixocarpa (green tomato) plants; 48 h later the complex inhibited PS II by transforming the active reaction centers to silent reaction centers or "heat sinks". After 72 h this effect disappeared, probably 5:HPB was metabolized by the plant. Chlorophyll a fluorescence of Trifolium alexandrinum (clover) leaves was affected with 5:HPB at the level of PQ pool reduction. 5:HPB decreases the tomato and clover dry-biomass, without affecting Lolium perenne (grass) plants, suggesting that complex 5 acts as selective herbicide for dicotyledonous plants. |
| Databáze: | OpenAIRE |
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