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Plant Physiol Biochem 2019 Apr 16. Epub 2019 Apr 16.

College of Life Science, Northwest Normal University, China.

Weisiensin B, a new ent-kaurene diterpenoid isolated from Isodon weisiensis (C. Y. Wu) H. Read More

Pest Manag Sci 2019 Apr 10. Epub 2019 Apr 10.

Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, C/República Saharaui, n 7, 11510-Puerto Real, Cádiz, Spain.

Background: Allelopathy and bioassays constitute fundamental tools in the search for new herbicide templates. The work described here is a continuation of a previous study focused on the structure-activity relationships between transport phenomena and phytotoxic activity. Different modifications were made to the naphthoquinone backbone and two key factors were identified as being responsible for changes in activity: lipophilicity and the nature of the functional group. Read More

Biol Lett 2018 Dec;14(12):20180635

1 Department of Bioscience, Aarhus Universitet , Ole Worms Alle 1, Aarhus 8000 , Denmark.

It is a generally accepted theory that ecological functions are enhanced with increased diversity in plant communities due to species complementarity effects. We tested this theory in a mesocosm study using freshwater submerged plant beds to determine if increasing species number caused overyielding and species complementarity. We applied a maximum of four species in the plant beds corresponding to the typical species number in natural freshwater plant beds. Read More

Aquat Toxicol 2019 Apr 1;211:81-91. Epub 2019 Apr 1.

São Paulo State University (UNESP), School of Sciences, Humanities and Languages Assis, Department of Biotechnology, Laboratory of Herbal Medicine and Natural Products, Avenida Dom Antônio 2100, CEP: 19806-900, Assis, São Paulo, Brazil; São Paulo State University (UNESP), Institute of Chemistry, Rua Prof. Francisco Degni 55, CEP: 14800-060, Araraquara, São Paulo, Brazil. Electronic address:

The excessive proliferation of toxin producing cyanobacteria constitutes a significant health risk to the environment and humans. This is due to the contamination of potable water and accumulation of cyanotoxins in plant and animal tissues. As a means of controlling bloom forming cyanobacteria, secondary metabolites with pro-oxidative activities from plants are used to treat water bodies contaminated with cyanobacterial blooms and their associated toxins. Read More

Ecotoxicol Environ Saf 2019 Aug 4;177:18-24. Epub 2019 Apr 4.

Ocean College, Zhejiang University, 310058, Hangzhou, PR China; Key Laboratory of Integrated Marine Monitoring and Applied Technologies for Harmful Algal Blooms, S.O.A., MATHAB, Shanghai, PR China. Electronic address:

Flavonoids are natural polyphenolic compounds from plants. As a new biotechnological algaecide, the molecular mechanism of plant flavonoids on the inhibition of Microcystis aeruginosa is still unknown. Therefore, in this study, we analyzed the variation of expressions of photosynthesis-related genes, microcystin synthesis-related genes and the genes involved in N and P acquisition in M. Read More

Front Plant Sci 2019 18;10:329. Epub 2019 Mar 18.

TERRA, Laboratory of Molecular Biophysics at Interfaces, Gembloux Agro-Bio Tech, University of Liège, Gembloux, Belgium.

Natural phytotoxic compounds could become an alternative to traditional herbicides in the framework of sustainable agriculture. Nonanoic acid, sarmentine and sorgoleone are such molecules extracted from plants and able to inhibit the growth of various plant species. However, their mode of action is not fully understood and despite clues indicating that they could affect the plant plasma membrane, molecular details of such phenomenon are lacking. Read More

Front Microbiol 2019 12;10:491. Epub 2019 Mar 12.

School of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou, China.

A wide spectrum of volatile organic compounds (VOCs) are released from algae in aquatic ecosystems. Environmental factors such as light, temperature, nutrition conditions and abiotic stresses affect their emission. These VOCs can enhance the resistance to abiotic stresses, transfer information between algae, play allelopathic roles, and protect against predators. Read More

Chemosphere 2019 Jun 12;225:424-433. Epub 2019 Mar 12.

Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, PR China.

Microcystis aeruginosa (M. aeruginosa), as the dominant algae in eutrophic water bodies, has caused a serious harm to the local eco-environment. A biological tool, employing allelopathic inhibitory of eucalyptus to control M. Read More

Front Plant Sci 2019 4;10:249. Epub 2019 Mar 4.

Departamento de Ciencia y Tecnología Agroforestal y Genética, Facultad de Farmacia, Instituto Botánico, Universidad de Castilla-La Mancha, Albacete, Spain.

stigmas are the main source of crocins, which are glucosylated apocarotenoids derived from zeaxanthin cleavage that give saffron its red color. Phytoene synthase (PSY) mediates the first committed step in carotenoid biosynthesis in plants. Four genes encoding functional enzymes were isolated from saffron. Read More

PeerJ 2019 12;7:e6564. Epub 2019 Mar 12.

Research Station of Hangzhou Bay Wetland Ecosystems, National Forestry Bureau/Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, P.R.China.

Background: L. is an aggressive exotic plant species in China that has potential allelopathic effects on competing plant species. Effects of hormesis are frequently observed in studies of allelopathy; however, the mechanisms of such effects need to be elucidated. Read More

Aquat Toxicol 2019 May 8;210:251-261. Epub 2019 Mar 8.

School of Chemistry, University of Wollongong, NSW, 2522, Australia.

The dinoflagellate Alexandrium minutum produces toxic compounds, including paralytic shellfish toxins, but also some unknown extracellular toxins. Although copper (Cu) is an essential element, it can impair microalgal physiology and increase their toxic potency. This study investigated the effect of different concentrations of dissolved Cu (7 nM, 79 nM and 164 nM) on A. Read More

J Agric Food Chem 2019 Apr 22;67(13):3643-3650. Epub 2019 Mar 22.

Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy , Northwest A&F University , Yangling , Shaanxi 712100 , People's Republic of China.

Bioactivity-guided isolation of the cultures of the endophytic fugus Xylaria sp. XC-16 residing in a deciduous tree Toona sinensis led to the discovery of four new allelochemicals (1-4), including three cytochalasins, epoxycytochalasin Z (1), epoxycytochalasin Z (2), and epoxyrosellichalasin (3), and an abietane-type diterpenoid, hydroxyldecandrin G (4), along with four known analogues, 10-phenyl-[12]-cytochalasins Z (5) and Z (6), cytochalasin K (7), and cytochalasin E (8). The structures of these compounds were elucidated by comprehensive spectroscopic methods, and their absolute configurations were determined by electronic circular dichroism (CD) and X-ray diffraction. Read More

Ecol Evol 2019 Feb 31;9(4):1750-1763. Epub 2019 Jan 31.

Herbario QCA, Laboratorio de Ecología de Plantas, Escuela de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales Pontificia Universidad Católica del Ecuador Quito Ecuador.

The conspecific negative density dependence hypothesis states that mortality of young trees (seedlings and saplings) is higher near conspecific adults due to mechanisms such as allelopathy, intraspecific competition, and pest facilitation, explaining why in the tropics, most of plant species tend to be rare and live dispersed. However, there are some tree species that defy this expectation and grow in large clusters of conspecific juveniles and adults. We hypothesize that conspecifics living in clusters show higher and/or more variable defensive profiles than conspecifics with dispersed distributions. Read More

Sci Total Environ 2019 Jun 19;667:412-418. Epub 2019 Feb 19.

Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, PR China.

Lakes represent an important source of drinking water resource for human beings. The presence of harmful algae blooms can pose a serious threat to lakes water quality. This study explored the feasibility of using eucalyptus plants and leaves extracts for controlling algae proliferation in an aquatic milieu. Read More

Tree Physiol 2019 Feb 28. Epub 2019 Feb 28.

Institute for Biological Research 'Siniša Stanković', University of Belgrade, Bulevar despota Stefana 142, Belgrade, Serbia.

Allelopathic plants exploit their chemical 'weapons' to prevail over the competition, suppress neighboring plants and consequently use the available resources more efficiently. However, the investigation of plant allelopathic interactions in rhizosphere is difficult to perform because of its high complexity due to interactions of biotic and abiotic factors. Thus, autonomous, aseptic root cultures of apple (Malus × domestica Borkh. Read More

Molecules 2019 Feb 19;24(4). Epub 2019 Feb 19.

Department of Chemistry, Faculty of Natural and Exact Sciences, Universidad del Valle, GIPNA, Cali 760032, Colombia.

A bio-guided study of leaf extracts allowed the isolation of two new macrobicyclic hydrolysable tannins, namely merianin A () and merianin B (), and oct-1-en-3-yl -xylopyranosyl-(1"-6')--glucopyranoside () from , in addition to 11 known compounds reported for the first time in the genus. The structures were elucidated by spectroscopic analyses including one- and two-dimensional NMR techniques and mass spectrometry. The bioactivities of the compounds were determined by measuring the DPPH radical scavenging activity and by carrying out antioxidant power assays (FRAP), etiolated wheat coleoptile assays and phytotoxicity assays on the standard target species W. Read More

PeerJ 2019 8;7:e6380. Epub 2019 Feb 8.

Department of Ecology, Leibniz Centre for Tropical Marine Research (ZMT), Bremen, Germany.

Observations of coral-algal competition can provide valuable information about the state of coral reef ecosystems. Here, we report contact rates and apparent competition states for six shallow lagoonal reefs in Fiji. A total of 81. Read More

Ecotoxicol Environ Saf 2019 May 14;173:203-213. Epub 2019 Feb 14.

Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.

According to the novel weapons hypothesis, root exudates are the inhibition factors for native species growth and development through invasive plants. It is hypothesized that antioxidant system (AOS) presents an effective role in plant defense system. The allelopathy indexes of P. Read More

Biochem Mol Biol Educ 2019 Feb 12. Epub 2019 Feb 12.

Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, 26505.

Allelopathy plays crucial roles in invasive plant viability and agricultural production systems. However, there is no well-established hands-on learning activity to teach the concept of allelopathy. Nor is there an activity which allows students to gain knowledge about glucosinolates and their corresponding enzyme, myrosinase, which are present in almost all Brassica crops. Read More

Plant Biol (Stuttg) 2019 Jan 28. Epub 2019 Jan 28.

Laboratory of Biology, State University of Mato Grosso do Sul, Coxim, Brazil.

Senna occidentalis is an invasive plant producing a series of allelochemicals that might inhibit the development of other plants. The objective of this study was to assess the phytotoxic effect of S. occidentalis extracts on the germination, development and antioxidant defence of the native species Tabebuia chrysotricha, T. Read More

Microbiology 2019 Jan 28. Epub 2019 Jan 28.

School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.

Algal blooms have severe impacts on the utilization of water resources. The discovery of allelopathy provides a new dimension to solving this problem due to its high efficiency, safety and economy. Allelopathy can suppress the growth of microalgae by impairing the structure, photosynthesis and enzyme activity of algal cells. Read More

J Agric Food Chem 2019 Feb 11;67(7):1973-1981. Epub 2019 Feb 11.

Agronomy Graduate Program , University of Passo Fundo , Passo Fundo , Rio Grande do Sul 99052-900 , Brazil.

Eragrostis plana (Nees) is an allelopathic plant with invasive potential in South American pastures. To isolate and identify phytotoxic compounds from leaves and roots of E. plana, a bioassay-directed isolation of the bioactive constituents was performed. Read More

Pest Manag Sci 2019 Jan 25. Epub 2019 Jan 25.

Allelopathy Group, Department of Organic Chemistry, School of Sciences, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain.

Allelopathy is the biological phenomenon of chemical interactions between living organisms in the ecosystem, and must be taken into account in addressing pest and weed problems in future sustainable agriculture. Allelopathy is a multidisciplinary science, but in some cases, aspects of its chemistry are overlooked, despite the need for a deep knowledge of the chemical structural characteristics of allelochemicals to facilitate the design of new herbicides. This review is focused on the most important advances in allelopathy, paying particular attention to the design and development of phenolic compounds, terpenoids and alkaloids as herbicides. Read More

Molecules 2019 Jan 24;24(3). Epub 2019 Jan 24.

Institute of General Food Chemistry, Lodz University of Technology, Stefanowskiego 4/10 St., 90924 Łódź, Poland.

Spreading of the plant species in new areas is supported by the hypothesis in which chemicals produced by alien species are allopathic to native plants. A novel weapon hypothesis was tested by using essential oil of dangerous alien species in laboratory conditions. Aboveground plant material was collected in south-east part of Slovakia, dried and hydrodistilled for essential oil isolation. Read More

Ecology 2019 Apr 8;100(4):e02621. Epub 2019 Mar 8.

Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, United Kingdom.

Floral chemistry mediates plant interactions with herbivores, pathogens, and pollinators. The chemistry of floral nectar and pollen, the primary food rewards for pollinators, can affect both plant reproduction and pollinator health. Although the existence and functional significance of nectar and pollen secondary metabolites has long been known, comprehensive quantitative characterizations of secondary chemistry exist for only a few species. Read More

Protoplasma 2019 Jan 17. Epub 2019 Jan 17.

Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.

The stress induced by allelochemicals present in stem aqueous extract (SAE) of Nicotiana plumbaginifolia on alterations in growth, ultrastructure on Cassia tora L., and mitotic changes on Allium cepa L. were inspected. Read More

Toxins (Basel) 2019 Jan 15;11(1). Epub 2019 Jan 15.

School of Marine and Atmospheric Sciences, Stony Brook University, Southampton, NY 11968, USA.

Globally, eutrophication and warming of aquatic ecosystems has increased the frequency and intensity of cyanobacterial blooms and their associated toxins, with the simultaneous detection of multiple cyanotoxins often occurring. Despite the co-occurrence of cyanotoxins such as microcystins and anatoxin-a (ATX) in water bodies, their effects on phytoplankton communities are poorly understood. The individual and combined effects of microcystin-LR (MC-LR) and ATX on the cyanobacteria spp. Read More

Sci Total Environ 2019 Apr 7;660:269-276. Epub 2019 Jan 7.

Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 238 Songling Road, Qingdao 266100, China.

Allelopathy has been regarded as chemical weapons for marine phytoplankton that enhanced competition ability in stressful conditions, especially during blooms. In a previous study, Chaetoceros curvisetus achieved growth advantage to Skeletonema costatum by producing allelochemicals. However, C. Read More

Front Plant Sci 2018 18;9:1835. Epub 2018 Dec 18.

ECOBIO, UMR 6553 CNRS, Université de Rennes 1, Rennes, France.

The release of allelochemicals by plants can affect the performance of other organisms positively or negatively. We tested the effects of aqueous extracts and leachates derived from the leaves and roots of the invasive water primrose () on one submerged native species - , and two exotic species - the submerged and the emergent growth form of . The effect of the aqueous extracts and leachates of on photosynthetic yield, growth (i. Read More

Environ Sci Pollut Res Int 2019 Feb 8;26(6):5357-5371. Epub 2019 Jan 8.

The Centre for Crop Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Gatton, QLD, 4343, Australia.

Chenopodium album and C. murale are cosmopolitan, annual weed species of notable economic importance. Their unique biological features, including high reproductive capacity, seed dormancy, high persistence in the soil seed bank, the ability to germinate and grow under a wide range of environmental conditions and abiotic stress tolerance, help these species to infest diverse cropping systems. Read More

Nat Prod Rep 2019 Jan 8. Epub 2019 Jan 8.

School of Biological Sciences, Aquatic Chemical Ecology Center, Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA. and School of Chemistry and Biochemistry, Aquatic Chemical Ecology Center, Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332-0230, USA.

Covering: January 2015 through December 2017This review focuses on recent studies on the chemical ecology of planktonic marine ecosystems, with the objective of presenting a comprehensive overview of new findings in the field in the time period covered. In order to highlight the role of chemically mediated interactions in the marine plankton this review has been organized by ecological concepts starting with intraspecific communication, followed by interspecific interactions (including facilitation and mutualism, host-parasite, allelopathy, and predator-prey), and finally the effects of plankton secondary metabolites on community and ecosystem-wide interactions. Read More

Int J Biol Macromol 2019 Apr 29;126:776-785. Epub 2018 Dec 29.

Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province, College of Chemistry and Chemical Engineering, Institute of Environmental and Analytical Sciences, Pharmaceutical College, Henan University, Kaifeng 475004, China. Electronic address:

This study compared the characterisations of polysaccharides from Chinese yam (Dioscorea opposita Thunb.) growing in sandy soil (SSCY), loessial soil (LSCY) and second-year continuous cropping (CCCY). SSCY contained the highest total polysaccharides (36. Read More

Appl Environ Microbiol 2019 Mar 20;85(5). Epub 2019 Feb 20.

School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA

Many plants produce allelopathic chemicals, such as stilbenes, to inhibit pathogenic fungi. The degradation of allelopathic compounds by bacteria associated with the plants would limit their effectiveness, but little is known about the extent of biodegradation or the bacteria involved. Screening of tissues and rhizosphere of peanut () plants revealed substantial enrichment of bacteria able to grow on resveratrol and pterostilbene, the most common stilbenes produced by the plants. Read More

Ecotoxicol Environ Saf 2019 Apr 13;170:461-467. Epub 2018 Dec 13.

Laboratório de Microbiologia e Biologia Molecular, Universidade Regional do Cariri, Rua Cel. Antonio Luis 1161, Pimenta, 63105-000 Crato, CE, Brazil. Electronic address:

The objective of this work was to evaluate the antioxidant, metal chelating and cytoprotective activity of the Eugenia jambolana Lam. extract, as well as of its flavonoid and tannic fractions, against the action of Mercury Chloride (HgCl). Flavonoids were quantified and an LC-MS chromatographic analysis was performed to identify secondary metabolites. Read More

Ecol Evol 2018 Nov 18;8(22):10847-10856. Epub 2018 Oct 18.

Department of Biology Indiana University Bloomington Indiana.

Mutualistic symbionts can provide diverse benefits to their hosts and often supply key trait variation for host adaptation. The bacterial symbionts of entomopathogenic nematodes play a crucial role in successful colonization of and reproduction in the insect host. Additionally, these symbionts can produce a diverse array of antimicrobial compounds to deter within-host competitors. Read More

Saudi J Biol Sci 2018 Nov 12;25(7):1339-1347. Epub 2016 Feb 12.

Department of Botany and Microbiology, Faculty of Science, Alexandria University, Alexandria, Egypt.

Germination bioassay was carried out to test the biological activity of L. (ASAE), Del. (AMAE), L. Read More

J Plankton Res 2018 Nov 26;40(6):655-666. Epub 2018 Sep 26.

Department of Marine Sciences, Skidaway Institute of Oceanography, University of Georgia, Savannah, GA, USA.

In aquatic environments, phytoplankton represent a major source of reactive oxygen species (ROS) such as superoxide and hydrogen peroxide. Many phytoplankton taxa also produce extracellular ROS under optimal growth conditions in culture. However, the physiological purpose of extracellular ROS production by phytoplankton and its wider significance to ecosystem-scale trophic interactions and biogeochemistry remain unclear. Read More

Toxins (Basel) 2018 Nov 26;10(12). Epub 2018 Nov 26.

United Graduate School, Tokyo University of Agriculture and Technology, 3-5-8 Saiwaicho, Fuchu, Tokyo 183-8509, Japan.

Weeds are rapidly developing resistance to synthetic herbicides, and this can pose a threat to the ecosystem. Exploring allelopathic species as an alternative weed control measure can help minimize the ecological threat posed by herbicide-resistant weeds. In this study, we aimed to evaluate the contribution of some polyphenols to the allelopathy of rosemary ( L. Read More

Bull Environ Contam Toxicol 2019 Jan 27;102(1):115-121. Epub 2018 Nov 27.

Eco-Environmental Protection Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201403, China.

Cyperus alternifolius (C. alternifolius) and Canna generalis (C. generalis) are widely used as artificial floating-bed (AFB) plants for water pollution control. Read More

Chem Biodivers 2019 Feb 18;16(2):e1800420. Epub 2019 Jan 18.

Laboratory of Herbology, Institute of Pesticides and Environmental Protection, Banatska 31b, 11080, Belgrade-Zemun, Serbia.

Total phenolic (TPC) and flavonoid (TFC) content, individual phenolic compounds and antioxidant activities of methanol extracts of wheat and corn straw were determined. Germination bioassay was conducted with Abutilon theophrasti Medik., Asclepias syriaca L. Read More

Nat Prod Res 2018 Nov 20:1-5. Epub 2018 Nov 20.

a Escola de Artes, Ciências e Humanidades , USP - Universidade de São Paulo , São Paulo-SP , Brazil.

The analysis by HPLC-PDA of the hydroalcoholic extract of the leaves of M. eriocarpum together with the injection of the fractions containing the already identified metabolites allowed the detection of at least 5 flavonoids, of which two are derived from apigenin and three from luteolin. After isolating larger amounts of isovitexin (I), assays were performed to evaluate the allelopathic activity together with the crude extract. Read More

New Phytol 2019 Apr 11;222(1):91-96. Epub 2018 Dec 11.

Department of Biology, University of British Columbia, Okanagan Campus, Kelowna, BC, V1V 1V7, Canada.

Contents Summary 91 I. Introduction 91 II. Primary PSF mechanisms 91 III. Read More

Nat Prod Res 2018 Nov 17:1-5. Epub 2018 Nov 17.

a Department of Natural Medicine and Pharmacognosy , School of Pharmacy, Qingdao University , Qingdao , China.

One new capsaicinoid, N-vanillyl-4E,6E-dien-8-methylnonanamide (4), along with nine known capsaicinoids, capsaicin (1), dihydrocapsaicin (2), N-vanillyloctanamide (3), nordihydrocapsaicin (5), N-vanillyldecanamide (6), homocapsaicin (7), N-vanillyl-4,8-dimethylnonanamide (8), homodihydrocapsaicin II (9), and homodihydrocapsaicin I (10) were isolated from the fruits of Capsicum annuum using semi-preparative high-performance liquid chromatography. The structural characterizations of the isolated compounds were elucidated by spectroscopic data and comparison with the literatures. Bioassays showed that the isolated capsaicinoids significantly reduced the radical length of Lactuca sativa seedling, this inhibition being dose-dependent. Read More

Bioorg Chem 2019 Feb 30;82:378-384. Epub 2018 Oct 30.

Institute of Pharmaceutical Sciences, Department of Pharmacognosy, University of Graz, Universitaetsplatz 4, 8010 Graz, Austria. Electronic address:

Capsaicinoids are reported to have a bunch of promising pharmacological activities, among them antibacterial effects against various strains of bacteria. In this study the effect on efflux pumps of mycobacteria was investigated. The importance of efflux pumps, and the inhibition of these, is rising due to their involvement in antibiotic resistance development. Read More

PLoS One 2018 7;13(11):e0205843. Epub 2018 Nov 7.

Department of Animal Ecology 1, BayCEER (Bayreuth Center for Ecology and Environmental Research), University of Bayreuth, Bayreuth, Germany.

Background: Impacts of invasive species on native communities are often difficult to assess, because they depend on a range of factors, such as species identity and traits. Such context-dependencies are poorly understood yet, but knowledge is required to predict the impact of invasions.

Materials And Methods: We assessed species- and developmental stage-specificity of competitive and allelopathic effects of the invasive plant Impatiens glandulifera on different developmental stages of four native plant species. Read More

J Ind Microbiol Biotechnol 2019 Jan 3;46(1):91-99. Epub 2018 Nov 3.

Department of Biological Sciences, University of Calgary, Calgary, AB, T2N 1N4, Canada.

Since the 1930s, parabens have been employed widely as preservatives in food, pharmaceutical, and personal care products. These alkyl esters of benzoic acid occur naturally in a broad range of plant species, where they are thought to enhance overall fitness through disease resistance and allelopathy. Current manufacture of parabens relies on chemical synthesis and the processing of 4-hydroxybenzoate as a precursor. Read More

Chemosphere 2019 Feb 26;216:785-793. Epub 2018 Oct 26.

Microbiology and Molecular Biology Laboratory, Regional University of Cariri, Crato, CE, Brazil. Electronic address:

The present study had as its objective to verify the Psidium guajava var. Pomifera L. chelating, antioxidant and cytoprotective effects against mercury and aluminum. Read More

Molecules 2018 Nov 1;23(11). Epub 2018 Nov 1.

Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China.

The aim of this study was to identify bioactive compounds from leaves of the invasive plant and assess their phytotoxic activity. Activity-guided fractionation led to the isolation of 6 bioactive compounds: xanthatin (), 1α,5α-epoxyxanthatin (), 4-epiisoxanthanol (), 4-epixanthanol (), loliolide () and dehydrovomifoliol (). Of them, compounds ⁻ were isolated from the for the first time. Read More

Toxins (Basel) 2018 Oct 29;10(11). Epub 2018 Oct 29.

Department of Marine Ecology, College of Marine Life Science, Ocean University of China, Qingdao 266003, China.

The toxic effects of the typically noxious bloom-forming dinoflagellate were studied using the allelopathic experimental system under controlled laboratory conditions. The potency of intact cell suspensions with whole cells, cell-free culture filtrate in different growth phases, and lysed cells with ultrasonication were compared, and the growth and reproduction of the marine rotifer were used as endpoints to evaluate toxic differences. The intact cell suspension resulted the most significant growth inhibition, including lethality, on the growth of ( < 0. Read More

Environ Sci Pollut Res Int 2018 Dec 28;25(36):36403-36411. Epub 2018 Oct 28.

Division of Marine Biology and Ecology, Institute of Oceanography, University of Gdańsk, Av. Piłsudskiego 46, 81-378, Gdynia, Poland.

The role of macroalgal allelopathy in aquatic systems has received increasing attention as a potential means of controlling cyanobacterial blooms. However, the allelopathic activity of Chara sp. on coexisting and bloom-forming picocyanobacteria is still largely unknown. Read More