1,140,002 results match your criteria Plant Poisoning Alkaloids - Quinolizidine & Isoquinoline


Nitric oxide mediated alleviation of abiotic challenges in plants.

Authors:
Afsana Praveen

Nitric Oxide 2022 Aug 15. Epub 2022 Aug 15.

Department of Biotechnology & Microbiology, School of Sciences, Noida International University, Uttar Pradesh, 203201, India. Electronic address:

Agriculture and ecosystem are negatively influenced by the abiotic stresses which create solemn pressures on plants as they are sessile in nature leading to excessive losses in economy. For maintenance of sustainable agriculture and to fulfil the cumulative call of food for rapidly growing population worldwide, it becomes crucial to protects the crop plants from climate fluctuations. Plants fight back against these challenges by generation of redox molecules comprising reactive oxygen species (ROS) and reactive nitrogen species (RNS) and cause modulation at cellular, physiological and molecular levels. Read More

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BsTup1 is required for growth, conidiogenesis, stress response and pathogenicity of Bipolaris sorokiniana.

Int J Biol Macromol 2022 Aug 15. Epub 2022 Aug 15.

College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China. Electronic address:

Tup1, a conserved transcriptional repressor, plays a critical role in the growth and development of fungi. Here, we identified a BsTup1 gene from the plant pathogenic fungus Bipolaris sorokiniana. The expression of BsTup1 showed a more than three-fold increase during the conidial stage compared with mycelium stage. Read More

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Transcriptional response and functional analysis of ATP-binding cassette transporters to tannic acid in pea aphid, Acyrthosiphon pisum (Harris).

Int J Biol Macromol 2022 Aug 15. Epub 2022 Aug 15.

Biocontrol Engineering Laboratory of Crop Diseases and Pests of Gansu Province, College of Plant Protection, Gansu Agricultural University, No. 1 Yingmen Village, Anning District, Lanzhou 730070, Gansu Province, China. Electronic address:

Although tannins are widely distributed in broad beans and alfalfa, the pea aphid (Acyrthosiphon pisum) can still destroy them. The ATP binding cassette (ABC) transporters participate in the metabolism of plant secondary metabolites and pesticides in insects. However, whether ABC transporter genes play a role in the metabolism of tannins in the pea aphid is unclear. Read More

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Novel application of biodegradable chitosan in agriculture: Using green nanopesticides to control Solenopsis invicta.

Int J Biol Macromol 2022 Aug 15. Epub 2022 Aug 15.

Guangdong Biological Pesticide Engineering Technology Research Center, South China Agricultural University, Guangzhou, China. Electronic address:

Botanical pesticides are biological pesticides that are environment friendly. However, their instability and short persistence limit their application. In this study, pH sensitive chitosan based rotenone (Rot) nanoparticles (CS/CMCS/Rot-NPs) were prepared using chitosan and carboxymethyl chitosan to take advantage of the acidic nature of the red fire ant midgut. Read More

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Indole-diterpenes alkaloid profiles of native grasses involved in tremorgenic syndromes in the Argentine Patagonia.

Toxicon 2022 Aug 15. Epub 2022 Aug 15.

Grupo Salud Animal, INTA Bariloche, San Carlos de Bariloche, Argentina.

One of the main intoxications to livestock in the Patagonia region of Argentina is the tremorgenic disease "Mal de Huecú", attributed to the consumption of the native grasses Poa huecu and/or Festuca argentina. In this report, five outbreaks of spontaneous intoxications were investigated.Several indole-diterpene alkaloids were identified in Poa huecu and Festuca argentina including the known tremorgen terpendole C and are likely the cause of "Mal de Huecú" disease. Read More

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Effect of exogenous l-aspartate nano‑calcium on root growth, calcium forms and cell wall metabolism of Brassica napus L.

NanoImpact 2022 Aug 15:100415. Epub 2022 Aug 15.

Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei 430070, PR China; The Key Laboratory of Oasis Ecoagriculture, Xinjiang Production and Construction Corps, Shihezi University, Shihezi, Xinjiang 832000, PR China. Electronic address:

Currently, l-aspartate nano‑calcium (Ca(L-asp)-NPs) has been sued as a calcium supplement for humans, but its effects on plants are not well elucidated. This study aimed to investigate the effect of exogenous Ca(L-asp)-NPs on the growth of rapeseed (Brassica napus L.) for the first time. Read More

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The adsorption of arsenic on micro- and nano-plastics intensifies the toxic effect on submerged macrophytes.

Environ Pollut 2022 Aug 15;311:119896. Epub 2022 Aug 15.

Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan, 430074, China. Electronic address:

Currently little is known about the adsorption behaviors of metalloids on microplastics (MPs) and their complex toxic effects on aquatic plants. Herein, we investigated the adsorption behaviors of arsenic (As(III) and As(V)) on three types of MPs (polystyrene, polyvinyl chloride, and polyethylene) with four different particle sizes (100, 10, 1, and 0.1 μm). Read More

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Plant nitrogen-use strategies and their responses to the urban elevation of atmospheric nitrogen deposition in southwestern China.

Environ Pollut 2022 Aug 15:119969. Epub 2022 Aug 15.

School of Earth System Science, Tianjin University, Tianjin, 300072, China. Electronic address:

The elevation of nitrogen (N) deposition by urbanization profoundly impacts the structure and function of surrounding forest ecosystems. Plants are major biomass sinks of external N inputs into forests. Yet, the N-use strategies of forest plants in many areas remain unconstrained in city areas, so their responses and adapting mechanisms to the elevated N deposition are open questions. Read More

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Cesium-137 and Cs/Cs atom ratios in marine zooplankton off the east coast of Japan during 2012-2020 following the Fukushima Dai-ichi nuclear power plant accident.

Environ Pollut 2022 Aug 15:119962. Epub 2022 Aug 15.

Central Laboratory, Marine Ecology Research Institute, 300 Iwawada, Onjuku-machi, Isumi-gun, Chiba, 299-5105, Japan.

We measured the concentrations of cesium isotopes (Cs, Cs, and Cs) in zooplankton samples collected in waters off the east coast of Japan from May 2015 to June 2020. By combining these data with those obtained previously from May 2012 to February 2015, we evaluated the long-term impacts of the Fukushima Dai-ichi Nuclear Power Plant accident on marine zooplankton. Relatively high Cs concentrations in zooplankton, exceeding 10 Bq/kg-dry weight, were sporadically observed until June 2016, regardless of year or station. Read More

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Cadmium promotes the absorption of ammonium in hyperaccumulator Solanum nigrum L. mediated by ammonium transporters and aquaporins.

Chemosphere 2022 Aug 15:136031. Epub 2022 Aug 15.

Key Laboratory for Subtropical Wetland Ecosystem Research of MOE, College of the Environment and Ecology, Xiamen University, Xiamen, Fujian, 361005, PR China. Electronic address:

Cadmium (Cd) is a toxic heavy metal affecting the normal growth of plants. Nitrate (NO) and ammonium (NH) are the primary forms of inorganic nitrogen (N) absorbed by plants. However, the mechanism of N absorption and regulation under Cd stress remains unclear. Read More

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Effects of arbuscular mycorrhizal inoculation on the phytoremediation of PAH-contaminated soil: A meta-analysis.

Chemosphere 2022 Aug 15:136033. Epub 2022 Aug 15.

Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China. Electronic address:

Inoculation with arbuscular mycorrhizal (AM) fungi can accelerate the phytoremediation process by increasing plant biomass and improving soil physicochemical and biological characteristics. However, a quantitative, data-based conclusion is yet to be derived on the roles of AM fungi in remediating soils polluted by polycyclic aromatic hydrocarbons (PAHs), and the impact factors are unclear. To address these issues, we performed a meta-analysis of 45 articles to estimate the effects of AM inoculation on the phytoremediation of soils polluted by PAHs and to examine the influence of experimental conditions on these effects. Read More

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Effect of preconceptional, prenatal and postnatal exposure to home environmental factors on childhood pneumonia: A key role in early life exposure.

Environ Res 2022 Aug 15:114098. Epub 2022 Aug 15.

XiangYa School of Public Health, Central South University, Changsha, China.

Background: Increasing evidence have associated pneumonia with early exposure to ambient air pollution. However, the role of indoor environmental factors exposure in early life on childhood pneumonia remains unclear.

Objective: To examine the association between indoor environmental factors exposure during different timing windows and childhood pneumonia, and to identify the key indoor factor(s) in different critical window(s). Read More

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Can aged microplastics be transport vectors for organic micropollutants? - Sorption and phytotoxicity tests.

Sci Total Environ 2022 Aug 15:158073. Epub 2022 Aug 15.

LSRE-LCM - Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal. Electronic address:

Microplastics have been investigated over the last decade as potential transport vectors for other pollutants. However, the specific role of plastic aging, in which plastics change their characteristics over time when exposed to environmental agents, has been overlooked. Therefore, sorption experiments were herein conducted using virgin and aged (by ozone treatment or rooftop weathering) microplastic particles of LDPE - low-density polyethylene, PET - poly(ethylene terephthalate), or uPVC - unplasticized poly(vinyl chloride). Read More

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Responses of crop productivity and reactive nitrogen losses to the application of animal manure to China's main crops: A meta-analysis.

Sci Total Environ 2022 Aug 15:158064. Epub 2022 Aug 15.

College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions of MOE, China Agricultural University, Beijing 100193, China. Electronic address:

The effective utilization of manure in cropland systems is essential to sustain yields and reduce reactive nitrogen (Nr) losses. However, there are still uncertainties regarding the substitution of mineral N fertilizer with manure in terms of its effects on crop yield and Nr losses. We conducted a comprehensive meta-analysis of wheat, maize, and rice applications in China and discovered that substituting mineral N fertilizer with manure increased wheat and maize yields by 4. Read More

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Co-incorporation of Chinese milk vetch (Astragalus sinicus L.), rice straw, and biochar strengthens the mitigation of Cd uptake by rice (Oryza sativa L.).

Sci Total Environ 2022 Aug 15:158060. Epub 2022 Aug 15.

Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China. Electronic address:

Soil cadmium (Cd) contamination is becoming a widespread concern because of its threat to global ecosystem health and food security. Co-incorporation of Chinese milk vetch (MV) and rice straw (RS) is a common agricultural practice in Southern China; however, the effects of combining these two materials with biochar on Cd bioavailability remain unclear. This study investigated the effects of MV, RS, rape straw biochar (RB), iron-modified biochar (FB), and their combinations on Cd uptake by rice through incubation and field experiments. Read More

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Deposition and eviction of histone variants define functional chromatin states in plants.

Authors:
Aline V Probst

Curr Opin Plant Biol 2022 Aug 15;69:102266. Epub 2022 Aug 15.

iGReD, CNRS, Inserm, Université Clermont Auvergne, 63000 Clermont-Ferrand, France. Electronic address:

The organization of DNA with histone proteins into chromatin is fundamental for the regulation of gene expression. Incorporation of different histone variants into the nucleosome together with post-translational modifications of these histone variants allows modulating chromatin accessibility and contributes to the establishment of functional chromatin states either permissive or repressive for transcription. This review highlights emerging mechanisms required to deposit or evict histone variants in a timely and locus-specific manner. Read More

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An electrochemical system for the rapid and accurate quantitation of microbial exoelectrogenic ability.

Biosens Bioelectron 2022 Jul 30;215:114584. Epub 2022 Jul 30.

CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China. Electronic address:

Microbial extracellular electron transfer (EET) plays a vital role in globally important environmental phenomena, including bioremediation, bioenergy generation, and biofuel production. The quantitation of microbial exoelectrogenic ability is fundamental to studying the process of EET. However, there is no accurate and time-saving protocol to directly evaluate EET ability, hindering our understanding and application of EET. Read More

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HvGST4 enhances tolerance to multiple abiotic stresses in barley: Evidence from integrated meta-analysis to functional verification.

Plant Physiol Biochem 2022 Aug 4;188:47-59. Epub 2022 Aug 4.

Research Center of Crop Stresses Resistance Technologies, Yangtze University, Jingzhou, 434025, China. Electronic address:

Extreme weather events have become more frequent, increasing crop yield fluctuations in many regions and thus the risk to global food security. Breeding crop cultivars with improved tolerance to a combination of abiotic stresses is an effective solution to counter the adverse impact of climate change. The ever-increasing genomic data and analytical tools provide unprecedented opportunities to mine genes with tolerance to multiple abiotic stresses through bioinformatics analysis. Read More

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Differential expression of ethylene biosynthetic and receptor genes in pollination-induced senescence of Dendrobium flowers.

Plant Physiol Biochem 2022 Aug 7;188:38-46. Epub 2022 Aug 7.

Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand; Academy of Science, The Royal Society of Thailand, Dusit, Bangkok, 10300, Thailand. Electronic address:

Following successful pollination, Dendrobium orchid flowers rapidly undergo senescence. In Dendrobium cv. Khao Chaimongkol, compatible pollination resulted in faster ethylene production and more rapid development of senescence symptoms, such as drooping, epinasty, venation and yellowing, compared with non-pollinated controls or pollination with incompatible pollinia. Read More

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Poly(2,3-Dihydrofuran): A Strong, Biorenewable, and Degradable Thermoplastic Synthesized via Room Temperature Cationic Polymerization.

J Am Chem Soc 2022 Aug 18. Epub 2022 Aug 18.

Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States.

Creation of strong and tough plastics from sustainable and biorenewable resources is a significant challenge in polymer science. This challenge is further complicated when attempting to make these materials using an economically viable process, which is often hindered by the production and availability of chemical feedstocks and the efficiency of the monomer synthesis. Herein, we report the synthesis and characterization of a strong thermoplastic made from 2,3-dihydrofuran (DHF), a monomer made in one step from 1,4-butanediol, a bioalcohol already produced on the plant scale. Read More

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Whole genome sequencing of mesorhizobia isolated from northern Canada.

Can J Microbiol 2022 Aug 18. Epub 2022 Aug 18.

Queen's University, Department of Biology, Kingston, Ontario, Canada;

Rhizobia are soil-dwelling bacteria that can form N2-fixing symbioses with legume plant species (Fabaceae). These bacteria are globally distributed; however, few studies have examined the genomics of rhizobia that live in cold environments. Here, we isolated and characterized three Mesorhizobium strains from legume nodules collected at a pair of distant low Arctic tundra and boreal forest sites in northern Canada. Read More

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Lunularin Producers versus Non-producers: Novel Human Metabotypes Associated with the Metabolism of Resveratrol by the Gut Microbiota.

J Agric Food Chem 2022 Aug 18. Epub 2022 Aug 18.

Laboratory of Food & Health, Research Group on Quality, Safety, and Bioactivity of Plant Foods, CEBAS-CSIC, Campus de Espinardo, Murcia 30100, Spain.

We describe here for the first time the consistent observation of two metabotypes associated with resveratrol metabolism by the human gut microbiota, that is, lunularin (LUNU)-producers and LUNU non-producers. In healthy volunteers ( = 195), resveratrol was reduced to dihydroresveratrol, which only in the LUNU-producer metabotype was sequentially dehydroxylated at the 5-position to yield LUNU and the 3-position to produce 4-hydroxydibenzyl. These metabolites (also 3,4'-dihydroxy--stilbene in some LUNU-producers) were detected in the urine and (or) feces of 74% of volunteers after consuming resveratrol, while 26% lacked these dehydroxylase activities. Read More

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Maillard Reaction Products with Anti-Tobacco Mosaic Virus Activities Generated in Processed R. Br. Seed Extract.

J Org Chem 2022 Aug 18. Epub 2022 Aug 18.

State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, PR China.

Six novel Maillard reaction products (MRPs) (-) were isolated from the processed R. Br. seed extract, along with one biogenetically related intermediate (). Read More

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GC-MS-based Fingerprinting Reveals Two Chemotypes in the Leaf Essential Oils from Magnolia grandiflora Trees within The Urban Forestry of a Colombian Andean Plateau.

Chem Biodivers 2022 Aug 18. Epub 2022 Aug 18.

Universidad Militar Nueva Granada, Departamento de Química, Campus Nueva Granada, Cajicá, COLOMBIA.

Magnolia grandiflora is an aromatic plant widely distributed around the world. In Colombia, and more specifically in Bogotá, M. grandiflora has been introduced as part of urban forestry programs, and their specimens are therefore subjected to several environments. Read More

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Decoding molecular recognition of inhibitors targeting HDAC2 via molecular dynamics simulations and configurational entropy estimation.

PLoS One 2022 18;17(8):e0273265. Epub 2022 Aug 18.

Division of Biochemistry and Biochemical Innovation, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand.

Molecular recognition by enzymes is a complicated process involving thermodynamic energies governing protein-ligand interactions. In order to aid the estimation of inhibitory activity of compounds targeting an enzyme, several computational methods can be employed to dissect this intermolecular contact. Herein, we report a structural dynamics investigation of an epigenetic enzyme HDAC2 in differentiating its binding to various inhibitors within the sub-sites of its active site. Read More

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Control of division in Chlamydomonas by cyclin B/CDKB1 and the anaphase-promoting complex.

PLoS Genet 2022 Aug 18;18(8):e1009997. Epub 2022 Aug 18.

The Rockefeller University, New York, New York, United States of America.

In yeast and animals, cyclin B binds and activates the cyclin-dependent kinase ('CDK') CDK1 to drive entry into mitosis. We show that CYCB1, the sole cyclin B in Chlamydomonas, activates the plant-specific CDKB1 rather than the CDK1 ortholog CDKA1, confirming and extending previous results. Time-lapse microscopy shows that CYCB1 is synthesized before each division in the multiple fission cycle, then is rapidly degraded 3-5 minutes before division occurs. Read More

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Soybean photosynthesis and crop yield are improved by accelerating recovery from photoprotection.

Science 2022 Aug 18;377(6608):851-854. Epub 2022 Aug 18.

Carl R Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.

Crop leaves in full sunlight dissipate damaging excess absorbed light energy as heat. This protective dissipation continues after the leaf transitions to shade, reducing crop photosynthesis. A bioengineered acceleration of this adjustment increased photosynthetic efficiency and biomass in tobacco in the field. Read More

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Habitat loss exacerbates pathogen spread: An Agent-based model of avian influenza infection in migratory waterfowl.

PLoS Comput Biol 2022 Aug 18;18(8):e1009577. Epub 2022 Aug 18.

Wildlife Ecology and Conservation Group, Wageningen University, Wageningen, The Netherlands.

Habitat availability determines the distribution of migratory waterfowl along their flyway, which further influences the transmission and spatial spread of avian influenza viruses (AIVs). The extensive habitat loss in the East Asian-Australasian Flyway (EAAF) may have potentially altered the virus spread and transmission, but those consequences are rarely studied. We constructed 6 fall migration networks that differed in their level of habitat loss, wherein an increase in habitat loss resulted in smaller networks with fewer sites and links. Read More

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Novel findings in context of molecular diversity and abundance of bacteriophages in wastewater environments of Riyadh, Saudi Arabia.

PLoS One 2022 18;17(8):e0273343. Epub 2022 Aug 18.

Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.

The diversity among bacteriophages depends on different factors like ecology, temperature conditions and genetic pool. Current study focused on isolation, identification and diversity of phages from 34 sewage water samples collected from two different wastewater treatment plants (WWTPs), King Saud University wastewater treatment plants (KSU-WWTP) and Manfoha wastewater treatment plants (MN-WWTP) in Riyadh, Saudi Arabia. Samples were analyzed by PCR and Next Generation Sequencing (NGS). Read More

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Intraspecies variation of the mitochondrial genome: An evaluation for phylogenetic approaches based on the conventional choices of genes and segments on mitogenome.

PLoS One 2022 18;17(8):e0273330. Epub 2022 Aug 18.

Institute of Plant Science and Resources, Okayama University, Kurashiki city, Okayama, Japan.

Intraspecies nucleotide sequence variation is a key to understanding the evolutionary history of a species, such as the geographic distribution and population structure. To date, numerous phylogenetic and population genetics studies have been conducted based on the sequences of a gene or an intergenic region on the mitochondrial genome (mtDNA), such as cytochrome c oxidase subunits or the D-loop. To evaluate the credibility of the usage of such 'classic' markers, we compared the phylogenetic inferences based on the analyses of the partial and entire mtDNA sequences. Read More

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