4 research outputs found
Herbicidal Activity of Thymbra capitata (L.) Cav. Essential Oil
[EN] The bioherbicidal potential ofThymbra capitata(L.) Cav. essential oil (EO) and its main compound carvacrol was investigated. In in vitro assays, the EO blocked the germination and seedling growth ofErigeron canadensisL.,Sonchus oleraceus(L.) L., andChenopodium albumL. at 0.125 mu L/mL, ofSetaria verticillata(L.) P.Beauv.,Avena fatuaL., andSolanum nigrumL. at 0.5 mu L/mL, ofAmaranthus retroflexusL. at 1 mu L/mL and ofPortulaca oleraceaL., andEchinochloa crus-galli(L.) P.Beauv. at 2 mu L/mL. Under greenhouse conditions,T. capitataEO was tested towards the emergent weeds from a soil seedbank in pre and post emergence, showing strong herbicidal potential in both assays at 4 mu L/mL. In addition,T. capitataEO, applied by spraying, was tested againstP. oleracea,A. fatuaandE. crus-galli. The species showed different sensibility to the EO, beingE. crus-gallithe most resistant. Experiments were performed againstA. fatuatestingT. capitataEO and carvacrol applied by spraying or by irrigation. It was verified that the EO was more active at the same doses in monocotyledons applied by irrigation and in dicotyledons applied by spraying. Carvacrol effects onArabidopsisroot morphology were also studied.This research was supported by the Universitat Politècnica de València [project number: SP20120543],
by Generalitat Valenciana [project number GV/2014/039], and by the Spanish Ministry of Science, Innovation
and Universities [project number: RTI2018¿094716¿B¿I00].
Thanks to Jovano Erris Nugroho and Muhamad Iqbal who collaborate to carry out in vivo experiment 4 during their internship in the Plant Health in Sustainable Cropping Systems Erasmus+ Programme. This research work has been developed as a result of a mobility stay funded by the Erasmus+-KA1 Erasmus Mundus Joint Master Degrees Programme of the European Commission under the PLANT HEALTH Project. Thanks to Xeda Italia S.r.l. for providing us Fitoil always when we need it. Thanks to Vicente Estornell Campos and the Library staff from Polytechnic University of Valencia that assisted us to get some helpful references.Verdeguer Sancho, MM.; Torres-Pagan, N.; Muñoz, M.; Jouini, A.; García-Plasencia, S.; Chinchilla, P.; Berbegal Martinez, M.... (2020). Herbicidal Activity of Thymbra capitata (L.) Cav. Essential Oil. Molecules. 25(12):1-31. https://doi.org/10.3390/molecules25122832S1312512Barros, L., Heleno, S. A., Carvalho, A. M., & Ferreira, I. C. F. R. (2010). Lamiaceae often used in Portuguese folk medicine as a source of powerful antioxidants: Vitamins and phenolics. LWT - Food Science and Technology, 43(3), 544-550. doi:10.1016/j.lwt.2009.09.024Goudjil, M. B., Zighmi, S., Hamada, D., Mahcene, Z., Bencheikh, S. E., & Ladjel, S. (2020). Biological activities of essential oils extracted from Thymus capitatus (Lamiaceae). South African Journal of Botany, 128, 274-282. doi:10.1016/j.sajb.2019.11.020Gagliano Candela, R., Maggi, F., Lazzara, G., Rosselli, S., & Bruno, M. (2019). The Essential Oil of Thymbra capitata and its Application as A Biocide on Stone and Derived Surfaces. Plants, 8(9), 300. doi:10.3390/plants8090300Tohidi, B., Rahimmalek, M., Arzani, A., & Sabzalian, M. R. (2020). Thymol, carvacrol, and antioxidant accumulation in Thymus species in response to different light spectra emitted by light-emitting diodes. Food Chemistry, 307, 125521. doi:10.1016/j.foodchem.2019.125521Vladimir-Knežević, S., Blažeković, B., Kindl, M., Vladić, J., Lower-Nedza, A., & Brantner, A. (2014). Acetylcholinesterase Inhibitory, Antioxidant and Phytochemical Properties of Selected Medicinal Plants of the Lamiaceae Family. Molecules, 19(1), 767-782. doi:10.3390/molecules19010767BRÄUCHLER, C. (2018). Delimitation and revision of the genus Thymbra (Lamiaceae). Phytotaxa, 369(1), 15. doi:10.11646/phytotaxa.369.1.2Paton, A. J., Springate, D., Suddee, S., Otieno, D., Grayer, R. J., Harley, M. M., … Savolainen, V. (2004). Phylogeny and evolution of basils and allies (Ocimeae, Labiatae) based on three plastid DNA regions. Molecular Phylogenetics and Evolution, 31(1), 277-299. doi:10.1016/j.ympev.2003.08.002Pastore, J. F. B., Harley, R. M., Forest, F., Paton, A., & van den Berg, C. (2011). Phylogeny of the subtribe Hyptidinae (Lamiaceae tribe Ocimeae) as inferred from nuclear and plastid DNA. TAXON, 60(5), 1317-1329. doi:10.1002/tax.605008Salmaki, Y., Zarre, S., Ryding, O., Lindqvist, C., Bräuchler, C., Heubl, G., … Bendiksby, M. (2013). Molecular phylogeny of tribe Stachydeae (Lamiaceae subfamily Lamioideae). Molecular Phylogenetics and Evolution, 69(3), 535-551. doi:10.1016/j.ympev.2013.07.024Salmaki, Y., Kattari, S., Heubl, G., & Bräuchler, C. (2016). Phylogeny of non-monophyletic Teucrium (Lamiaceae: Ajugoideae): Implications for character evolution and taxonomy. Taxon, 65(4), 805-822. doi:10.12705/654.8LI, B., & OLMSTEAD, R. G. (2017). Two new subfamilies in Lamiaceae. Phytotaxa, 313(2), 222. doi:10.11646/phytotaxa.313.2.9Bräuchler, C., Meimberg, H., & Heubl, G. (2010). Molecular phylogeny of Menthinae (Lamiaceae, Nepetoideae, Mentheae) – Taxonomy, biogeography and conflicts. Molecular Phylogenetics and Evolution, 55(2), 501-523. doi:10.1016/j.ympev.2010.01.016World Checklist of Lamiaceae. Facilitated by the Royal Botanic Gardens, Kewhttp://wcsp.science.kew.orgHarley, R. M., Atkins, S., Budantsev, A. L., Cantino, P. D., Conn, B. J., Grayer, R., … Upson, T. (2004). Labiatae. Flowering Plants · Dicotyledons, 167-275. doi:10.1007/978-3-642-18617-2_11Miceli, A., Negro, C., & Tommasi, L. (2006). Essential oil variability in Thymbra capitata (L.) Cav. growing wild in Southern Apulia (Italy). Biochemical Systematics and Ecology, 34(6), 528-535. doi:10.1016/j.bse.2005.12.010Delgado-Adámez, J., Garrido, M., Bote, M. E., Fuentes-Pérez, M. C., Espino, J., & Martín-Vertedor, D. (2017). Chemical composition and bioactivity of essential oils from flower and fruit of Thymbra capitata and Thymus species. Journal of Food Science and Technology, 54(7), 1857-1865. doi:10.1007/s13197-017-2617-5Alves, T. M. de A., Silva, A. F., Brandão, M., Grandi, T. S. M., Smânia, E. de F. A., Smânia Júnior, A., & Zani, C. L. (2000). Biological screening of Brazilian medicinal plants. Memórias do Instituto Oswaldo Cruz, 95(3), 367-373. doi:10.1590/s0074-02762000000300012BOUNATIROU, S., SMITI, S., MIGUEL, M., FALEIRO, L., REJEB, M., NEFFATI, M., … PEDRO, L. (2007). Chemical composition, antioxidant and antibacterial activities of the essential oils isolated from Tunisian Thymus capitatus Hoff. et Link. Food Chemistry, 105(1), 146-155. doi:10.1016/j.foodchem.2007.03.059Nejad Ebrahimi, S., Hadian, J., Mirjalili, M. H., Sonboli, A., & Yousefzadi, M. (2008). Essential oil composition and antibacterial activity of Thymus caramanicus at different phenological stages. Food Chemistry, 110(4), 927-931. doi:10.1016/j.foodchem.2008.02.083Casiglia, S., Bruno, M., Scandolera, E., Senatore, F., & Senatore, F. (2019). Influence of harvesting time on composition of the essential oil of Thymus capitatus (L.) Hoffmanns. & Link. growing wild in northern Sicily and its activity on microorganisms affecting historical art crafts. Arabian Journal of Chemistry, 12(8), 2704-2712. doi:10.1016/j.arabjc.2015.05.017Grayer, R. J., & Harborne, J. B. (1994). A survey of antifungal compounds from higher plants, 1982–1993. Phytochemistry, 37(1), 19-42. doi:10.1016/0031-9422(94)85005-4Kalemba, D., & Kunicka, A. (2003). Antibacterial and Antifungal Properties of Essential Oils. Current Medicinal Chemistry, 10(10), 813-829. doi:10.2174/0929867033457719Ricci, D., Fraternale, D., Giamperi, L., Bucchini, A., Epifano, F., Burini, G., & Curini, M. (2005). Chemical composition, antimicrobial and antioxidant activity of the essential oil of Teucrium marum (Lamiaceae). Journal of Ethnopharmacology, 98(1-2), 195-200. doi:10.1016/j.jep.2005.01.022Al-Mustafa, A. H., & Al-Thuniba, O. Y. (2008). Antioxidant Activity of Some Jordanian Medicinal Plants Used Traditionally for Treatment of Diabetes. Pakistan Journal of Biological Sciences, 11(3), 351-358. doi:10.3923/pjbs.2008.351.358Dhifi, W., Bellili, S., Jazi, S., Bahloul, N., & Mnif, W. (2016). Essential Oils’ Chemical Characterization and Investigation of Some Biological Activities: A Critical Review. Medicines, 3(4), 25. doi:10.3390/medicines3040025Ruberto, G., Biondi, D., & Piattelli, M. (1992). The Essential Oil of SicilianThymus capitatus(L.) Hoffmanns, et Link. Journal of Essential Oil Research, 4(4), 417-418. doi:10.1080/10412905.1992.9698094Saija, A., Speciale, A., Trombetta, D., Leto, C., Tuttolomondo, T., La Bella, S., … Ruberto, G. (2016). Phytochemical, Ecological and Antioxidant Evaluation of Wild Sicilian Thyme: Thymbra capitata
(L.) Cav
. Chemistry & Biodiversity, 13(12), 1641-1655. doi:10.1002/cbdv.201600072Arras, G., & Grella, G. E. (1992). Wild thyme,Thymus capitatus, essential oil seasonal changes and antimycotic activity. Journal of Horticultural Science, 67(2), 197-202. doi:10.1080/00221589.1992.11516237Tommasi, L., Negro, C., Cerfeda, A., Nutricati, E., Zuccarello, V., De Bellis, L., & Miceli, A. (2007). Influence of Environmental Factors on Essential Oil Variability inThymbra capitata(L.) Cav. Growing Wild in Southern Puglia (Italy). Journal of Essential Oil Research, 19(6), 572-580. doi:10.1080/10412905.2007.9699335Salas, J. B., Téllez, T. R., Alonso, M. J. P., Pardo, F. M. V., de los Ángeles Cases Capdevila, M., & Rodríguez, C. G. (2010). Chemical composition and antioxidant activity of the essential oil ofThymbra capitata(L.) Cav. in Spain. Acta Botanica Gallica, 157(1), 55-63. doi:10.1080/12538078.2010.10516189Rodrigues, L. S., Monteiro, P., Maldoa-Martins, M., Monteiro, A., Povoa, O., & Teixeira, G. (2006). BIODIVERSITY STUDIES ON PORTUGUESE THYMBRA CAPITATA. Acta Horticulturae, (723), 127-132. doi:10.17660/actahortic.2006.723.13El Hadj Ali, I. B., Guetat, A., & Boussaid, M. (2012). Variation of Volatiles in Tunisian Populations of Thymbra capitata (L.) Cav. (Lamiaceae). Chemistry & Biodiversity, 9(7), 1272-1285. doi:10.1002/cbdv.201100344Katz, D. A., Sneh, B., & Friedman, J. (1987). The allelopathic potential ofCoridothymus capitatus L. (Labiatae). Preliminary studies on the roles of the shrub in the inhibition of annuals germination and/or to promote allelopathically active actinomycetes. Plant and Soil, 98(1), 53-66. doi:10.1007/bf02381727Dudai, N., Poljakoff-Mayber, A., Mayer, A. M., Putievsky, E., & Lerner, H. R. (1999). Journal of Chemical Ecology, 25(5), 1079-1089. doi:10.1023/a:1020881825669Saoud, I., Hamrouni, L., Gargouri, S., Amri, I., Hanana, M., Fezzani, T., … Jamoussi, B. (2013). Chemical composition, weed killer and antifungal activities of Tunisian thyme (Thymus capitatusHoff. et Link.) essential oils. Acta Alimentaria, 42(3), 417-427. doi:10.1556/aalim.42.2013.3.15Chaimovitsh, D., Shachter, A., Abu-Abied, M., Rubin, B., Sadot, E., & Dudai, N. (2016). Herbicidal Activity of Monoterpenes Is Associated with Disruption of Microtubule Functionality and Membrane Integrity. Weed Science, 65(1), 19-30. doi:10.1614/ws-d-16-00044.1Verdeguer, M., Castañeda, L. G., Torres-Pagan, N., Llorens-Molina, J. A., & Carrubba, A. (2020). Control of Erigeron bonariensis with Thymbra capitata, Mentha piperita, Eucalyptus camaldulensis, and Santolina chamaecyparissus Essential Oils. Molecules, 25(3), 562. doi:10.3390/molecules25030562Cordeau, S., Triolet, M., Wayman, S., Steinberg, C., & Guillemin, J.-P. (2016). Bioherbicides: Dead in the water? A review of the existing products for integrated weed management. Crop Protection, 87, 44-49. doi:10.1016/j.cropro.2016.04.016Mahmood, I., Imadi, S. R., Shazadi, K., Gul, A., & Hakeem, K. R. (2016). Effects of Pesticides on Environment. Plant, Soil and Microbes, 253-269. doi:10.1007/978-3-319-27455-3_13Harker, K. N., & O’Donovan, J. T. (2013). Recent Weed Control, Weed Management, and Integrated Weed Management. Weed Technology, 27(1), 1-11. doi:10.1614/wt-d-12-00109.1Olson, S. (2015). An Analysis of the Biopesticide Market Now and Where it is Going. Outlooks on Pest Management, 26(5), 203-206. doi:10.1564/v26_oct_04Santamarina, M., Ibáñez, M., Marqués, M., Roselló, J., Giménez, S., & Blázquez, M. (2017). Bioactivity of essential oils in phytopathogenic and post-harvest fungi control. Natural Product Research, 31(22), 2675-2679. doi:10.1080/14786419.2017.1286479Tuttolomondo, T., Dugo, G., Leto, C., Cicero, N., Tropea, A., Virga, G., … La Bella, S. (2015). Agronomical and chemical characterisation ofThymbra capitata(L.) Cav. biotypes from Sicily, Italy. Natural Product Research, 29(14), 1289-1299. doi:10.1080/14786419.2014.997726Miguel, M. G., Gago, C., Antunes, M. D., Megías, C., Cortés-Giraldo, I., Vioque, J., … Figueiredo, A. C. (2015). Antioxidant and Antiproliferative Activities of the Essential Oils fromThymbra capitataandThymusSpecies Grown in Portugal. Evidence-Based Complementary and Alternative Medicine, 2015, 1-8. doi:10.1155/2015/851721Karousou, R., Koureas, D. N., & Kokkini, S. (2005). Essential oil composition is related to the natural habitats: Coridothymus capitatus and Satureja thymbra in NATURA 2000 sites of Crete. Phytochemistry, 66(22), 2668-2673. doi:10.1016/j.phytochem.2005.09.020Vasilakoglou, I., Dhima, K., Paschalidis, K., & Ritzoulis, C. (2013). Herbicidal potential onLolium rigidumof nineteen major essential oil components and their synergy. Journal of Essential Oil Research, 25(1), 1-10. doi:10.1080/10412905.2012.751054Hazrati, H., Saharkhiz, M. J., Niakousari, M., & Moein, M. (2017). Natural herbicide activity of Satureja hortensis L. essential oil nanoemulsion on the seed germination and morphophysiological features of two important weed species. Ecotoxicology and Environmental Safety, 142, 423-430. doi:10.1016/j.ecoenv.2017.04.041Pinheiro, P. F., Costa, A. V., Alves, T. de A., Galter, I. N., Pinheiro, C. A., Pereira, A. F., … Fontes, M. M. P. (2015). Phytotoxicity and Cytotoxicity of Essential Oil from Leaves of Plectranthus amboinicus, Carvacrol, and Thymol in Plant Bioassays. Journal of Agricultural and Food Chemistry, 63(41), 8981-8990. doi:10.1021/acs.jafc.5b03049Tworkoski, T. (2002). Herbicide effects of essential oils. Weed Science, 50(4), 425-431. doi:10.1614/0043-1745(2002)050[0425:heoeo]2.0.co;2Benvenuti, S., Cioni, P. L., Flamini, G., & Pardossi, A. (2017). Weeds for weed control: Asteraceae essential oils as natural herbicides. Weed Research, 57(5), 342-353. doi:10.1111/wre.12266N. MALPASSI, R. (2006). Herbicide effects on cuticle ultrastructure in Eleusine indica and Portulaca oleracea. BIOCELL, 30(1), 51-56. doi:10.32604/biocell.2006.30.051Schreiber, L. (1995). A mechanistic approach towards surfactant/wax interactions: Effects of octaethyleneglycolmonododecylether on sorption and diffusion of organic chemicals in reconstituted cuticular wax of barley leaves. Pesticide Science, 45(1), 1-11. doi:10.1002/ps.2780450102Hull, H. M., Morton, H. L., & Wharrie, J. R. (1975). Environmental influences on cuticle development and resultant foliar penetration. The Botanical Review, 41(4), 421-452. doi:10.1007/bf02860832Kern, A. J., Jackson, L. L., & Dyer, W. E. (1997). Fatty acid and wax biosynthesis in susceptible and triallate-resistantAvena fatuaL. Pesticide Science, 51(1), 21-26. doi:10.1002/(sici)1096-9063(199709)51:13.0.co;2-9SANYAL, D., BHOWMIK, P. C., & REDDY, K. N. (2008). Effects of surfactants on primisulfuron activity in barnyardgrass (Echinochloa crus-galli [L.] Beauv.) and green foxtail (Setaria viridis [L.] Beauv.). Weed Biology and Management, 8(1), 46-53. doi:10.1111/j.1445-6664.2007.00273.xPrinciples of Soil and Plant Water Relations. (2014). doi:10.1016/c2013-0-12871-1Kim, H. K., Park, J., & Hwang, I. (2014). Investigating water transport through the xylem network in vascular plants. Journal of Experimental Botany, 65(7), 1895-1904. doi:10.1093/jxb/eru075Norris, R. F. (1974). PENETRATION OF 2,4-D IN RELATION TO CUTICLE THICKNESS. American Journal of Botany, 61(1), 74-79. doi:10.1002/j.1537-2197.1974.tb06029.xSchönherr, J., & Riederer, M. (1989). Foliar Penetration and Accumulation of Organic Chemicals in Plant Cuticles. Reviews of Environmental Contamination and Toxicology, 1-70. doi:10.1007/978-1-4613-8850-0_1GOURET, E., ROHR, R., & CHAMEL, A. (1993). Ultrastructure and chemical composition of some isolated plant cuticles in relation to their permeability to the herbicide, diuron. New Phytologist, 124(3), 423-431. doi:10.1111/j.1469-8137.1993.tb03832.xRiederer, M., & Schönherr, J. (1985). Accumulation and transport of (2,4-dichlorophenoxy)acetic acid in plant cuticles. Ecotoxicology and Environmental Safety, 9(2), 196-208. doi:10.1016/0147-6513(85)90022-3Melo, C. R., Picanço, M. C., Santos, A. A., Santos, I. B., Pimentel, M. F., Santos, A. C. C., … Bacci, L. (2018). Toxicity of essential oils of Lippia gracilis chemotypes and their major compounds on Diaphania hyalinata and non-target species. Crop Protection, 104, 47-51. doi:10.1016/j.cropro.2017.10.013Araniti, F., Graña, E., Krasuska, U., Bogatek, R., Reigosa, M. J., Abenavoli, M. R., & Sánchez-Moreiras, A. M. (2016). Loss of Gravitropism in Farnesene-Treated Arabidopsis Is Due to Microtubule Malformations Related to Hormonal and ROS Unbalance. PLOS ONE, 11(8), e0160202. doi:10.1371/journal.pone.0160202Smyth, D. R. (2016). Helical growth in plant organs: mechanisms and significance. Development, 143(18), 3272-3282. doi:10.1242/dev.134064Graña, E., Costas-Gil, A., Longueira, S., Celeiro, M., Teijeira, M., Reigosa, M. J., & Sánchez-Moreiras, A. M. (2017). Auxin-like effects of the natural coumarin scopoletin on Arabidopsis cell structure and morphology. Journal of Plant Physiology, 218, 45-55. doi:10.1016/j.jplph.2017.07.007Verbelen, J.-P., Le, J., Vissenberg, K., De Cnodder, T., Vandenbussche, F., Sugimoto, K., & Van Der Straeten, D. (2008). Microtubules And The Control Of Cell Elongation In Arabidopsis Roots. NATO Science for Peace and Security Series C: Environmental Security, 73-90. doi:10.1007/978-1-4020-8843-8_4Blume, Y. B., Krasylenko, Y. A., & Yemets, A. I. (2012). Effects of phytohormones on the cytoskeleton of the plant cell. Russian Journal of Plant Physiology, 59(4), 515-529. doi:10.1134/s1021443712040036López-González, D., Costas-Gil, A., Reigosa, M. J., Araniti, F., & Sánchez-Moreiras, A. M. (2020). A natural indole alkaloid, norharmane, affects PIN expression patterns and compromises root growth in Arabidopsis thaliana. Plant Physiology and Biochemistry, 151, 378-390. doi:10.1016/j.plaphy.2020.03.047The International Herbicide-Resistant Weed Databasewww.weedscience.orgAngelini, L. G., Carpanese, G., Cioni, P. L., Morelli, I., Macchia, M., & Flamini, G. (2003). Essential Oils from Mediterranean Lamiaceae as Weed Germination Inhibitors. Journal of Agricultural and Food Chemistry, 51(21), 6158-6164. doi:10.1021/jf0210728DÍAZ-TIELAS, C., GRAÑA, E., SOTELO, T., REIGOSA, M. J., & SÁNCHEZ-MOREIRAS, A. M. (2012). The natural compound trans-chalcone induces programmed cell death in Arabidopsis thaliana roots. Plant, Cell & Environment, 35(8), 1500-1517. doi:10.1111/j.1365-3040.2012.02506.
Phytotoxic activity of the natural compound norharmane on crops, weeds and model plants
Norharmane is a secondary metabolite that appears in different species of land plants. In this paper, we investigated for the first time the specificity of norharmane through germination and growth tests on some crops as Zea mays L. (maize), Triticum aestivum L. (wheat), Oryza sativa L. (rice) and Lactuca sativa L. (lettuce) and weeds as Amaranthus retroflexus L. (amaranth), Echinochloa crus-galli L. (barnyard grass), Plantago lanceolata L. (ribwort), Portulaca oleracea L. (common purslane) and Avena fatua L. (wild oat), and its phytotoxic capacity on the metabolism of adult Arabidopsis thaliana L. (thale cress) by measuring chlorophyll a fluorescence, pigment content, total proteins, osmotic potential and morphological analysis. Norharmane had an inhibitory effect on the germination of A. fatua and P. lanceolata, and the growth of P. oleracea, E. crus-galli and A. retroflexus. On adult A. thaliana plants, the compound was more effective to watering, leading to water stress that compromised the growth of the plants and ultimately affected the photosynthetic apparatus. Therefore, this research shows that norharmane not only affects seedlings’ metabolism, but also damages the metabolism of adult plants and can be a potential model for a future bioherbicide given its specificity.Ministerio de Ciencia e Innovación | Ref. FPU14-02243Ministerio de Economía y Competitividad | Ref. AGL2013-41281-
Rosmarinic acid induces programmed cell death in Arabidopsis seedlings through reactive oxygen species and mitochondrial dysfunction
Phytotoxic potential of rosmarinic acid (RA), a caffeic acid ester largely found in aromatic species, was evaluated on Arabidopsis through metabolomic and microscopic approaches. In-vitro bioassays pointed out that RA affected root growth and morphology, causing ROS burst, ROS scavengers activity inhibition and consequently, an alteration on cells organization and ultrastructure. In particular, RA-treatment (175 μM) caused strong vacuolization, alteration of mitochondria structure and function and a consistent ROS-induced reduction of their transmembrane potential (ΔΨm). These data suggested a cell energy deficit also confirmed by the metabolomic analysis, which highlighted a strong alteration of both TCA cycle and amino acids metabolism. Moreover, the increase in H2O2 and O2− contents suggested that RA-treated meristems underwent oxidative stress, resulting in apoptotic bodies and necrotic cells. Taken together, these results suggest that RA inhibits two of the main ROS scavengers causing high ROS accumulation, responsible of the alterations on mitochondrial ultrastructure and activity through ΔΨm dissipation, TCA-cycle alteration, cell starvation and consequently cell death on Arabidopsis seedlings. All these effects resulted in a strong inhibition on root growth and development, which convert RA in a promising molecule to be explored for further use in weed management.Xunta de Galicia | Ref. GRC2015/01
Rosmarinic acid induces programmed cell death in Arabidopsis seedlings through reactive oxygen species and mitochondrial dysfunction.
Phytotoxic potential of rosmarinic acid (RA), a caffeic acid ester largely found in aromatic species, was evaluated on Arabidopsis through metabolomic and microscopic approaches. In-vitro bioassays pointed out that RA affected root growth and morphology, causing ROS burst, ROS scavengers activity inhibition and consequently, an alteration on cells organization and ultrastructure. In particular, RA-treatment (175 μM) caused strong vacuolization, alteration of mitochondria structure and function and a consistent ROS-induced reduction of their transmembrane potential (ΔΨm). These data suggested a cell energy deficit also confirmed by the metabolomic analysis, which highlighted a strong alteration of both TCA cycle and amino acids metabolism. Moreover, the increase in H2O2 and O2- contents suggested that RA-treated meristems underwent oxidative stress, resulting in apoptotic bodies and necrotic cells. Taken together, these results suggest that RA inhibits two of the main ROS scavengers causing high ROS accumulation, responsible of the alterations on mitochondrial ultrastructure and activity through ΔΨm dissipation, TCA-cycle alteration, cell starvation and consequently cell death on Arabidopsis seedlings. All these effects resulted in a strong inhibition on root growth and development, which convert RA in a promising molecule to be explored for further use in weed management