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J Agric Food Chem 2022 Jun 16. Epub 2022 Jun 16.

Université de Strasbourg, CNRS, IPHC UMR 7178, Chimie Analytique des Molécules BioActives et Pharmacognosie, F-67000 Strasbourg, France.

With the aim of evaluating the antigerminative activity of plant extracts, a miniaturized assay using 96-well plates (WP assay) was developed and compared to the long-established assay using Petri dishes (PD assay). The WP assay yielded results comparable to those of the PD assay using an ethanolic extract of the Himalayan balsam and lawsone as a standard. It also allowed the needed volume of the test solution to be cut by half and the number of required cress seeds to be cut by more than 1. Read More

Pest Manag Sci 2022 Jun 16. Epub 2022 Jun 16.

Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO) , Campus CEIA3, School of Science, University of Cadiz. C/ República Saharaui 7, 11510, Puerto Real (Cádiz), Spain.

Background: Natural products are a promising source for the development of new pesticides with alternative mechanisms of action. In this study, we evaluated the phytotoxic and antifungal activity of a novel family of natural C -sesquiterpenoids and performed a study of the effect caused by the elimination of the α-methylene-γ-butyrolactone system and its importance to their biological activity.

Results: Many tested compounds exhibited a strong, phytotoxic activity. Read More

An Acad Bras Cienc 2022 13;94(2):e20201661. Epub 2022 Jun 13.

School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.

This study aimed to estimate the allelopathic intensity of four Asteraceae invasive plant species (IPS), including Conyza canadensis (L.) Cronq., Erigeron annuus (L. Read More

RSC Adv 2022 May 18;12(23):14939-14944. Epub 2022 May 18.

Department of Resources and Environment, Anhui Science and Technology University Fengyang 233100 China

There are phenolic acids with allelopathy in the rhizosphere soil of plants. At present, the identification and quantification of phenolic acids in different matrix mixtures is usually analysed by high performance liquid chromatography, but the detection of phenolic acids in soil has rarely been studied. As well as, previous studies have evaluated a limited number of target compounds. Read More

Molecules 2022 May 26;27(11). Epub 2022 May 26.

Department of Hydrobiology, Faculty of Biology, Adam Mickiewicz University in Poznan, Uniwersytetu Poznanskiego 6, 61-614 Poznan, Poland.

Allelopathy is an interaction that releases allelochemicals (chemicals that act allelopathically) from plants into the environment that can limit or stimulate the development, reproduction, and survival of target organisms and alter the environment. L. contains chemicals that are allelopathic, such as phenolic acids. Read More

Mar Environ Res 2022 Jun 1;179:105671. Epub 2022 Jun 1.

Division of Marine Ecosystems Functioning, Institute of Oceanography, University of Gdańsk, Av. Piłsudskiego 46, 81-378, Gdynia, Poland.

Organisms from the Synechococcus genus constitute one of the major contributors to oceanic primary production, broadly distributed in waters with wide range of environmental conditions. This work investigated the influence of abiotic factors (temperature, irradiance, and salinity) on the strength of allelopathic interactions between different phenotypes of picoplanktonic cyanobacteria of the genus Synechococcus sp. (Type 1, Type 2, and Type 3a) employing mixed cultures and cell-free filtrate assays. Read More

J Environ Manage 2022 Aug 20;316:115241. Epub 2022 May 20.

Laboratorio Biología de Plantas, Universidad de Chile, Av. Santa Rosa #11315, La Pintana, Santiago, CP: 8820808, Chile. Electronic address:

The ecosystems of the Mediterranean regions are severely threatened by human activity, and although we have made progress in physical restoration measures, little is known about the interactions between the plants of these biomes. The objective of this study is to contribute to document interactions between seeds and seedlings of three woody species native to Chile (P. chilensis, Q. Read More

Toxins (Basel) 2022 04 28;14(5). Epub 2022 Apr 28.

Seafood Research Center, Industry Academy Cooperation Foundation (IACF), Silla University, 606, Advanced Seafood Processing Complex, Wonyang-ro, Amnam-dong, Seo-gu, Busan 49277, Korea.

Phlorotannins have been proven to contain numerous bioactive compounds that have potential to be applied in variety industries, including cosmetics, functional foods, nutraceuticals, environmental management, and medicine. The larvicidal and growth-inhibiting properties of phlorotannins have been extensively studied in various organisms. However, the toxicity of the phloroglucinol oligomer of phlorotannin is unclear, especially in , , , and , which are commonly used in many bioassays. Read More

Toxins (Basel) 2022 04 28;14(5). Epub 2022 Apr 28.

Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy.

To cope with the rising food demand, modern agriculture practices are based on the indiscriminate use of agrochemicals. Although this strategy leads to a temporary solution, it also severely damages the environment, representing a risk to human health. A sustainable alternative to agrochemicals is the use of plant metabolites and plant-based pesticides, known to have minimal environmental impact compared to synthetic pesticides. Read More

Nat Prod Res 2022 May 26:1-7. Epub 2022 May 26.

Laboratorio de Química de Productos Naturales, Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile.

Despite its worldwide relevance as an invasive plant, there are few studies on (gorse) and its allelopathic activity is almost unexplored. The allelochemical profile of gorse was analysed through methanolic extract of pods and roots, and its phytotoxic effects on germination. The methanolic extract of pods had no effect in germination, while extract of roots resulted in a U-shaped dose-response curve: reducing the germination at concentration 0. Read More

Sci Total Environ 2022 Sep 19;838(Pt 2):156055. Epub 2022 May 19.

Zhejiang University, Ocean College, 1 Zheda Road, Zhoushan, Zhejiang 316000, China; Key Laboratory of Watershed Non-point Source Pollution Control and Water Eco-security of Ministry of Water Resources, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou 310058, China. Electronic address:

Harmful algal blooms (HAB) are a serious problem worldwide. Allelochemicals from natural plants were recently thought to be promising anti-algaecide in controlling harmful algae. However, the programmed cell death (PCD) process of algae under allelopathic pressure induced by 5,4'-dihydroxyflavone (5,4'-DHF) was poorly understood. Read More

Environ Sci Pollut Res Int 2022 May 19. Epub 2022 May 19.

College of Plant Science, Jilin University, Changchun, 130062, China.

In the Qinghai-Tibet Plateau, both the large daily temperature difference and soil salinization make plants susceptible to abiotic stresses such as freeze-thaw and salinity. Meanwhile, crops in this area can be affected by artemisinin, an antimalarial secondary metabolite produced in Artemisia. Under freeze-thaw and salinity stresses, artemisinin was induced as an allelopathy stress factor to explore the physiological response of highland barley, including the relative electrical conductivity (RC), soluble protein (SP) content, malondialdehyde (MDA) content, antioxidant enzyme activity, and water use efficiency (WUE). Read More

Methods Mol Biol 2022 ;2447:119-126

Department of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia.

Activity of proteases in tissues can be influenced by various intrinsic and extrinsic factors. One of the activities that is regularly monitored in organisms ranging from prokaryotes to metazoans is the -aspase-like activity: activity of proteases, which cleave their substrates after the negatively charged amino acid residues, especially the aspartic acid. This activity is also known as the caspase-like activity, since the caspases, metazoan cysteine proteases, are one of the best characterized proteases with Asp-directed activities. Read More

Front Plant Sci 2022 29;13:829421. Epub 2022 Apr 29.

College of Agriculture, South China Agricultural University, Guangzhou, China.

L. (milk vetch), one of the most widespread green manure species, is widely planted in the temperate zone. L. Read More

Plants (Basel) 2022 Apr 20;11(9). Epub 2022 Apr 20.

Department of Plant Biology and Soil Science, Faculty of Biology, University of Vigo, 36310 Vigo, Spain.

The introduction of allelopathic cover crops for green manuring or mulching is a regular practice in Integrated Weed Management. In this context, the alternative use of the abundant phytotoxic residues of allelopathic plants from the agroecosystem, e.g. Read More

Int J Mol Sci 2022 Apr 21;23(9). Epub 2022 Apr 21.

Department of Biological Sciences, Royal Holloway University of London, Egham TW20 0EX, UK.

Molecular responses of plants to natural phytotoxins comprise more general and compound-specific mechanisms. How phytotoxic chalcones and other flavonoids inhibit seedling growth was widely studied, but how they interfere with seed germination is largely unknown. The dihydrochalcone and putative allelochemical myrigalone A (MyA) inhibits seed germination and seedling growth. Read More

Zhongguo Zhong Yao Za Zhi 2022 May;47(9):2309-2314

Guizhou University of Traditional Chinese Medicine Guiyang 550025, China.

This study aims to explore the resource utilization of used fungus-growing materials produced in the cultivation of Gastrodia elata. To be specific, based on the production practice, this study investigated the recycling mechanism of used fungus-growing materials of G. elata by Phallus inpudicus. Read More

Sci Rep 2022 04 22;12(1):6661. Epub 2022 Apr 22.

Zhejiang Provincial Key Laboratory of Bamboo Research, Northwest Zhejiang Bamboo Forest Ecological Station, Zhejiang Academy of Forestry, Hangzhou, 310023, China.

The objectives of this study were to investigate the allelopathic effects of sesame extracts of on seed germination of moso bamboo, and to isolate and identify the potential allelochemicals. A factorial design with three organs (root, stem and leaf) and five concentrations (0, 25, 50, 75 and 100 mg mL) was carried out. Seeds of moso bamboo were soaked in sesame extracts to investigate their germination and growth. Read More

Plants (Basel) 2022 Apr 8;11(8). Epub 2022 Apr 8.

Department of Agriculture, Food and Environment (Di3A), University of Catania, 95123 Catania, Italy.

Durum wheat is one of the largest cultivated crops across Mediterranean areas. The high demand for sustainable crop productions, especially concerning weed management, is driving the return to local landraces. In the present work, the in vitro allelopathic effects of the extracts of three durum wheat landraces ('Timilia', 'Russello' and 'Perciasacchi') and a modern variety ('Mongibello'), obtained from three different plant parts (ears, stems and roots), were tested on seed germination (G) and mean germination time (MGT) of L. Read More

Plants (Basel) 2022 Apr 7;11(8). Epub 2022 Apr 7.

Department of Smart Farm Science, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea.

With allelopathic composts, potential merits for preventing initial weed infestations have been observed in crop transplantation. However, previous studies have rarely investigated whether high temperatures, generated during composting, decrease allelopathic ability. This study evaluated the thermal allelopathic effect of two coniferous plants ( and ) on germination and seedling growth using their characterized allelochemical destinations. Read More

Protoplasma 2022 Apr 20. Epub 2022 Apr 20.

Department of Botany, Panjab University, Chandigarh, 160 014, India.

Allelopathy has been proposed as an efficient mechanism of invasion by plant species via growth inhibition and suppression of the resident plant community. Verbesina encelioides (Cav.) Benth. Read More

Plants (Basel) 2022 Mar 29;11(7). Epub 2022 Mar 29.

Plant Production Group, Faculty of Environmental and Agricultural Sciences, Universidad de Salamanca, 37007 Salamanca, Spain.

The allelopathic effect of pistachios was analyzed by field and laboratory tests. The parameters analyzed in the field trials were the biomass, weed density, weed diversity, and specific richness of the weed community. The studies were carried out in the area under the canopy and in the area beyond the influence of the pistachio tree, and the results obtained were compared. Read More

Plant Signal Behav 2022 12;17(1):2058256

College of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, Henan, China.

To study the allelopathic effect of the extracts of , the changes of cell density of were measured. The anti-algae allelopathic effect of different organic solvent extracts of was evaluated, and the physiological, biochemical indexes were determined to discuss the mechanism of algal inhibition. The results showed that the petroleum ether, dichloromethane and ethyl acetate extracts showed various inhibitory effects on . Read More

Plants (Basel) 2022 Mar 8;11(6). Epub 2022 Mar 8.

Department of Agronomy, Bahauddin Zakariya University, Multan 60800, Pakistan.

Weeds are among the major issues responsible for reduction in yield and profit in any crop production system. Herbicides are the easiest and quickest solution of weeds; however, their frequent use exert negative consequences on environment, human health, and results in the evolution of herbicide-resistant weed species. Due to these reasons, alternative weed management methods that are less harmful to environment and human health are needed. Read More

J Agric Food Chem 2022 Mar 15;70(12):3644-3653. Epub 2022 Mar 15.

Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), School of Science, University of Cádiz, Campus CEIA3, C/ República Saharaui, 7, Puerto Real, Cádiz 11510, Spain.

The encapsulation of bioactive natural products has emerged as a relevant tool for modifying the poor physicochemical properties often exhibited by agrochemicals. In this regard, natural guaiane-type sesquiterpene lactones isolated from L. have been encapsulated in a core/shell [email protected] system. Read More

Plant Divers 2022 Jan 12;44(1):11-19. Epub 2021 Jul 12.

Florida Museum of Natural History, University of Florida, Gainesville, FL, 32611, USA.

Predictive studies play a crucial role in the study of biological invasions of terrestrial plants under possible climate change scenarios. Invasive species are recognized for their ability to modify soil microbial communities and influence ecosystem dynamics. Here, we focused on six species of allelopathic flowering plants-, , ssp. Read More

Chemosphere 2022 Jul 9;298:134245. Epub 2022 Mar 9.

College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.

The unique and efficient characteristics of allelopathy in submerged plants make it an environmentally friendly method to control harmful algal blooms. Increased research focus has been placed on the improved allelochemical extraction methods of submerged plants because of their cost-utility relationships. In this study, the growth inhibition effect of Vallisneria extract on Microcystis aeruginosa (M. Read More

Plants (Basel) 2022 Feb 11;11(4). Epub 2022 Feb 11.

College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China.

Allelopathy is an important process in plant communities. The effects of allelopathy on seed germination and seedling development have been extensively investigated. However, the influences of extract soaking time and concentration on the foregoing parameters are poorly understood. Read More

Biomolecules 2022 02 12;12(2). Epub 2022 Feb 12.

Department of Biology, University of Bari Aldo Moro, Via E. Orabona 4, 70125 Bari, Italy.

Allelochemicals are considered an environment-friendly and promising alternative for weed management, although much effort is still needed for understanding their mode of action and then promoting their use in plant allelopathy management practices. Here, we report that Inuloxin A (InA), an allelochemical isolated from , inhibited root elongation and growth of seedlings of and at the highest concentrations tested. InA-induced antioxidant responses in the seedlings were investigated by analysing the contents of glutathione (GSH) and ascorbate (ASC), and their oxidized forms, dehydroascorbate (DHA), and glutathione disulphide (GSSG), as well as the redox state of thiol-containing proteins. Read More

Chem Biodivers 2022 Apr 8;19(4):e202100973. Epub 2022 Mar 8.

School of Plant Protection, Hainan University, Haikou, 570228, China.

Finding agriculturally active compounds from nature or finding active lead compounds from natural products, artificial synthesis and structural modification are the main ways to create new agrochemical. In order to explore the agricultural activities of Chonemorpha splendens Chun et Tsiang (C. splendens), an important medicinal plant, the antioxidant activities and allelopathic potential were investigated. Read More