| production of phytotoxins by phoma exigua var. exigua, a potential mycoherbicide against perennial thistles. | the potential of the different phoma exigua var. exigua strains for the biocontrol of the perennial weeds sonchus arvensis and cirsium arvense, occurring throughout temperate regions of the world, has been evaluated in previous studies. the majority of the above strains produced ascosonchine, a newly discovered enol tautomer of 4- pyridylpyruvic acid, whereas strains c-177 and s-9, though virulent to weeds, did not produce the above metabolite. in this study, it was demonstrated that the above t ... | 2008 | 18598037 |
| relation between in vitro production of ascosonchine and virulence of strains of the potential mycoherbicide ascochyta sonchi: a method for its quantification in complex samples. | the potential of the fungus ascochyta sonchi as a mycoherbicide for the biocontrol of the perennial weeds sonchus arvensis and cirsium arvense that occur throughout temperate regions of the world is under evaluation. ascosonchine, a newly discovered enol tautomer of 4-pyridylpyruvic acid with potential herbicidal properties, is the main phytotoxin produced by this fungus. a simple and sensitive method has been developed for the rapid quantitative analysis of ascosonchine based on hplc with uv de ... | 2013 | 17019938 |
| evaluation of the growth response of six invasive species to past, present and future atmospheric carbon dioxide. | the response of plant species to future atmospheric carbon dioxide concentrations [co(2)] has been determined for hundreds of crop and tree species. however, no data are currently available regarding the response of invasive weedy species to past or future atmospheric [co(2)]. in the current study, the growth of six species which are widely recognized as among the most invasive weeds in the continental united states, canada thistle (cirsium arvense (l.) scop.), field bindweed (convolvulus arvens ... | 2003 | 12493868 |
| chemopreventive effect of a mixture of chinese herbs (antitumor b) on chemically induced oral carcinogenesis. | in this study, we evaluated chemopreventive efficacy of antitumor b, a chinese herbal mixture of six plants (sophora tonkinensis, polygonum bistorta, prunella vulgaris, sonchus arvensis l., dictamnus dasycarpus, and dioscorea bulbifera) on the development of 4-nitroquinoline-1-oxide (4nqo) induced oral squamous cell carcinomas in a/j mice. antitumor b, delivered through diet, inhibited 4nqo-induced oral cancer development by 59.19%. the reduction of cell proliferation appears to be associated wi ... | 2011 | 22086836 |
| antioxidant and antibacterial activity of six edible wild plants (sonchus spp.) in china. | the total phenolic and flavonoid, antioxidant and antibacterial activities of six sonchus wild vegetables (sonchus oleraceus l., sonchus arvensis l., sonchus asper (l.) hill., sonchus uliginosus m.b., sonchus brachyotus dc. and sonchus lingianus shih) in china were investigated. the results revealed that s. arvensis extract and s. oleraceus extract contained the highest amount of phenolic and flavonoid, respectively. among the methanol extracts of six sonchus species, s. arvensis extract exhibit ... | 2011 | 21793765 |
| characterization of begomovirus components from a weed suggests that begomoviruses may associate with multiple distinct dna satellites. | a begomovirus disease complex associated with sonchus arvensis, a common weed in pakistan was studied using cloning, nucleic acid sequencing and phylogenetic analysis. the complex associated with this weed consists of a monopartite begomovirus and several distinct betasatellites and alphasatellites. the monopartite begomovirus associated with yellow vein disease of sonchus arvensis showed 95-99% nucleotide sequence identity with alternanthera yellow vein virus (alyvv) reported from china, vietna ... | 2010 | 20306125 |
| stagonolides b-f, nonenolides produced by stagonospora cirsii, a potential mycoherbicide of cirsium arvense. | stagonospora cirsii, a fungal pathogen isolated from cirsium arvense and proposed as a potential mycoherbicide of this perennial noxious weed, produces phytotoxic metabolites in liquid and solid cultures. recently, the main metabolite, stagonolide (1), with interesting phytotoxic properties, was isolated from a liquid culture and characterized as a new nonenolide. in the present work this same fungus, grown in solid culture, exhibited an increased capacity to produce nonenolides. five new noneno ... | 2008 | 18088096 |
| nonenolides and cytochalasins with phytotoxic activity against cirsium arvense and sonchus arvensis: a structure-activity relationships study. | a structure-activity relationships study was conducted assaying 15 natural analogues and derivatives belonging to two groups of organic compounds, nonenolides and cytochalasins, for their toxicity against the composite perennial weeds cirsium arvense and sonchus arvensis occurring through the temperate region of world. the toxic nonenolides (stagonolide, putaminoxin, pinolidoxin) and cytochalasins (deoxaphomin, cytochalasins a, b, f, t, z2 and z3) were isolated from phytopathogenic stagonospora, ... | 2008 | 18155260 |
| colletochlorins e and f, new phytotoxic tetrasubstituted pyran-2-one and dihydrobenzofuran, isolated from colletotrichum higginsianum with potential herbicidal activity. | a new tetrasubstituted pyran-2-one and a new dihydrobenzofuran, named colletochlorins e and f (1 and 2, respectively), were isolated from the culture filtrates of the fungus colletotrichum higginsianum together with the already known colletochlorin a, 4-chloroorcinol, and colletopyrone. colletochlorin e, the main metabolite, and colletochlorin f were characterized by spectroscopic (nmr, hresims) and chemical methods as 3-[7-chloro-4-hydroxy-2-(1-hydroxy-1-methylethyl)-6-methyl-2,3-dihydrobenzofu ... | 2017 | 28042942 |
| biological evaluation and determination of the absolute configuration of chloromonilicin, a strong antimicrobial metabolite isolated from alternaria sonchi. | chloromonilicin was isolated for the first time from alternaria sonchi, a mycoherbicide proposed for the control of the noxious weed sonchus arvensis. the already known alternethanoxins a and b and the three recently isolated phytotoxic polycyclic ethanones named alternethanoxins c-e were also isolated from the same source. chloromonilicin was identified by spectroscopic data (essentially one-dimensional nmr, 2-dimensional nmr and high-resolution esi-ms) and its structure was confirmed by single ... | 2016 | 26174176 |
| alternethanoxins c-e, further polycyclic ethanones produced by alternaria sonchi, a potential mycoherbicide for sonchus arvensis biocontrol. | three new polycyclic ethanones, named alternethanoxins c-e, were isolated together with the well-known and closely related alternethanoxins a and b, from the solid culture of alternaria sonchi, a fungal pathogen proposed for perennial sowthistle (sonchus arvensis l.) biocontrol. alternethanoxins c-e were characterized by spectroscopic methods (essentially nmr and hresi ms) as 2'-dihydroxymethyl-2,5,6,6'-tetrahydroxy-3'-methoxy-biphenyl-3-carboxylic acid methyl ester, 1,4,6,9,10-pentahydroxy-7-me ... | 2015 | 25623801 |
| sesquiterpene lactones from sonchus arvensis l. and their antibacterial activity against streptococcus mutans atcc 25175. | two new sesquiterpene lactones, 1beta-sulfate-5alpha, 6betah-eudesma-3-en-12, 6alpha-olide (1) and 1beta-(p-hydroxyphenyl acetyl)-15-o-beta-d-glucopyranosyl-5alpha, 6betah-eudesma-3-en-12, 6alpha-olide (2) were isolated from sonchus arvensis l. (asteraceae), together with eight known compounds. their structures were elucidated through spectroscopic and chemical methods. they were evaluated for antibacterial activity. among them, compounds 1 and 7 exhibited antibacterial activity against oral pat ... | 2010 | 20006685 |
| potential of sonchus arvensis for the phytoremediation of lead-contaminated soil. | sonchus arvensis is one of the pioneer plant species that were found in the abandoned bo ngam pb mine in thailand. s. arvensis was collected from three sites. the highest pb shoot concentration was 9317 mg kg(-1) and the highest translocation factor (tf) and bioaccumulation factor (bf) values were 2.5 and 6.0, respectively. to investigate pb uptake capacity of s. arvensis, a hydroponic experiment was performed for 15 d. s. arvensis exposed to 5 mg l(-1) pb solution had the highest pb shoot accum ... | 2008 | 19260217 |