Exploring sp. M21F004 for Biocontrol of Bacterial and Fungal Phytopathogens.

This study explores the biocontrol potential of sp. M21F004, a lactic acid bacteria (LAB) isolated from marine environments, against several bacterial and fungal phytopathogens. Out of 50 marine bacterial isolates, sp.

Biocontrol potential of natamycin-producing Streptomyces lydicus JCK-6019 against soil-borne fungal diseases of cucumber and characterization of its biocontrol mechanism.

Background: Fusarium oxysporum f. sp. cucumerinum and Rhizoctonia solani AG-4 are the two most important fungal pathogens causing soil-borne fungal diseases of cucumber; they are difficult to control and cause serious economic losses.

Eco-friendly biocontrol of pine wilt disease: Enhancing tree defense with Bacillus subtilis JCK-1398 for sustainable forest management.

Pine wilt disease (PWD), caused by pinewood nematodes (Bursaphelenchus xylophilus), poses a significant threat to forestry worldwide. This study introduces a novel biocontrol strategy using Bacillus subtilis JCK-1398, which was selected and identified for its resistance-induction potential after extensive screening of microbial strains from pine tissues. The bacterium was found to biostimulate resistance in Pinus densiflora.

Biocontrol of head blight in rice using JCK-7158.

head blight (FHB) is a destructive disease caused by several species of , such as and . FHB affects cereal crops, including wheat, barley, and rice, worldwide. -infected kernels not only cause reduced yields but also cause quality loss by producing mycotoxins, such as trichothecenes and zearalenone, which are toxic to animals and humans.

Transcriptomic Insights into Abies koreana Drought Tolerance Conferred by Aureobasidium pullulans AK10.

The conservation of the endangered Korean fir, Abies koreana, is of critical ecological importance. In our previous study, a yeast-like fungus identified as Aureobasidium pullulans AK10, was isolated and shown to enhance drought tolerance in A. koreana seedlings.

Exploration of a multifunctional biocontrol agent Streptomyces sp. JCK-8055 for the management of apple fire blight.

Apple fire blight, caused by the bacterium Erwinia amylovora, is a devastating disease of apple and pear trees. Biological control methods have attracted much attention from researchers to manage plant diseases as they are eco-friendly and viable alternatives to synthetic pesticides. Herein, we isolated Streptomyces sp.

Treatment Mitigates Drought Stress in via Rhizosphere Microbiome Modulation.

The Korean fir tree , an endangered species in Korea, faces threats primarily from climate change-induced stress and drought. This study proposed a sustainable method to enhance drought tolerance using a black yeast-like fungus identified as (AK10). The 16S/ITS metabarcoding analysis assessed the impact of drought and AK10 treatment on the seedlings' rhizosphere microbiome.

Elucidation of the nematicidal mode of action of grammicin on Caenorhabditis elegans.

Grammicin (Gra) is derived from the endophytic fungus Xylaria grammica EL000614 and shows nematicidal activity against the devastating root-knot nematode Meloidogyne incognita in-vitro, in planta, and in-field experiments. However, the mechanism of the nematicidal action of Gra remains unclear. In this study, Gra exposure to the model genetic organism Caenorhabditis elegans affected its L1, L2/3, L4, and young adult stages.

Biological Control Efficacy and Action Mechanism of JCK-2201 Producing Meso-2,3-Butanediol Against Tomato Bacterial Wilt.

Bacterial wilt caused by is a fatal disease that affects the production of tomatoes and many other crops worldwide. As an effective strategy to manage bacterial wilt, biological control agents using plant growth-promoting rhizobacteria (PGPR) are being developed. In this study, we screened 2,3-butanediol (BDO)-producing PGPR to control tomato bacterial wilt and investigated the action mechanism of the disease control agent.

Root-Knot Nematode () Control Using a Combination of WiKim0090 and Copper Sulfate.

Lactic acid bacteria (LAB) exert antagonistic activity against root-knot nematodes, mainly by producing organic acids via carbohydrate fermentation. However, they have not yet been used for root-knot nematode () control owing to a lack of economic feasibility and effectiveness. In this study, we aimed to isolate organic acid-producing LAB from kimchi (Korean traditional fermented cabbage) and evaluated their nematicidal activity.

Enhancement of Disease Control Efficacy of Chemical Fungicides Combined with Plant Resistance Inducer 2,3-Butanediol against Turfgrass Fungal Diseases.

Turfgrass, the most widely grown ornamental crop, is severely affected by fungal pathogens including Sclerotinia homoeocarpa, Rhizoctonia solani, and Magnaporthe poae. At present, turfgrass fungal disease management predominantly relies on synthetic fungicide treatments. However, the extensive application of fungicides to the soil increases residual detection frequency, raising concerns for the environment and human health.

Exogenous Bio-Based 2,3-Butanediols Enhanced Abiotic Stress Tolerance of Tomato and Turfgrass under Drought or Chilling Stress.

Among abiotic stresses in plants, drought and chilling stresses reduce the supply of moisture to plant tissues, inhibit photosynthesis, and severely reduce plant growth and yield. Thus, the application of water stress-tolerant agents can be a useful strategy to maintain plant growth under abiotic stresses. This study assessed the effect of exogenous bio-based 2,3-butanediol (BDO) application on drought and chilling response in tomato and turfgrass, and expression levels of several plant signaling pathway-related gene transcripts.

sp. AN090126 as a Biocontrol Agent against Bacterial and Fungal Plant Diseases.

Bacteria and fungi are major phytopathogens which substantially affect global agricultural productivity. In the present study, sp. AN090126, isolated from agricultural suppressive soil in Korea, showed broad-spectrum antagonistic activity against various phytopathogenic bacteria and fungi.

Dysbiosis in the Rhizosphere Microbiome of Standing Dead Korean Fir ().

The Korean fir a native coniferous tree species mainly found on Mt. Halla in Jeju, South Korea, is suffering from continuous population decline and has been declared an endangered species. Research efforts have focused on the possible abiotic causes behind this worrying decline.

Systemic Acquired Resistance-Mediated Control of Pine Wilt Disease by Foliar Application With Methyl Salicylate.

Pine wilt disease (PWD), caused by the pinewood nematode, is the most destructive disease in pine forest ecosystems worldwide. Extensive research has been done on PWD, but effective disease management is yet to be devised. Generally, plants can resist pathogen attack via a combination of constitutive and inducible defenses.

Optimization of -Mediated Transformation of EL000614, an Endolichenic Fungus Producing Grammicin.

An endolichenic fungus EL000614 produces grammicin, a potent nematicidal pyrone derivative that can serve as a new control option for root-knot nematodes. We optimized an -mediated transformation (ATMT) protocol for to support genetic studies. Transformants were successfully generated after co-cultivation of homogenized young mycelia of with strain AGL-1 carrying a binary vector that contains the bacterial hygromycin B phosphotransferase () gene and the gene in T-DNA.

Inhibition of Oomycetes by the Mixture of Maleic Acid and Copper Sulfate.

Since the protective activity of the Bordeaux mixture against plant disease caused by oomycetes was discovered, copper compounds have been used for more than a century as an effective plant protection strategy. However, the application of excessive copper can cause adverse effects through long-term heavy metal accumulation in soils. Therefore, it is necessary to develop new strategies to reduce or replace copper in pesticides based on organic and low-input farming systems.

sp. JCK-6131 Protects Plants Against Bacterial and Fungal Diseases via Two Mechanisms.

Plant bacterial and fungal diseases cause significant agricultural losses and need to be controlled. Beneficial bacteria are promising candidates for controlling these diseases. In this study, sp.

Nematicidal Activity of Grammicin Biosynthesis Pathway Intermediates in KCTC 13121BP against .

Grammicin, a polyketide metabolite produced by the endolichenic fungus KCTC 13121BP, shows strong nematicidal activity against This study was performed to elucidate the grammicin biosynthesis pathway of KCTC 13121BP and to examine the nematicidal activity of the biosynthesis intermediates and derivatives against . Two grammicin biosynthesis intermediates were isolated from a T-DNA insertion transformant (strain TR-74) of KCTC 13121BP and identified as 2-(hydroxymethyl)cyclohexa-2,5-diene-1,4-dione (compound ) and 2,5-dihydroxybenzaldehyde (compound ), which were also reported to be intermediates in the biosynthesis pathway of patulin, an isomer of grammicin. This indicates that the grammicin biosynthesis pathway overlaps almost with that of patulin, except for the last few steps.

Draft Genome Sequence of EL000614, a Strain Producing Grammicin, a Potent Nematicidal Compound.

An endolichenic fungus, strain EL000614, showed strong nematicidal effects against plant pathogenic nematode, by producing grammicin. We report genome assembly of EL000614 comprised of 25 scaffolds with a total length of 54.73 Mb, N50 of 4.

First Report of Shot-Hole on Flowering Cherry Caused by and pv. .

Shot-hole disease (SH) is one of the most common and important diseases affecting flowering cherry (FC; Matsumura; Somei-yoshino) trees in South Korea every year, resulting in premature defoliation and reduced flowering in the following year. However, pathogens associated with the disease remain unknown, which has rendered disease management challenging. Here, the pathogens associated with SH, their biochemical characteristics, and their host range were elucidated.

Deciphering the Relationship Between Cycloheximides Structures and Their Different Biological Activities.

species are the most important sources of antibacterial, antifungal, and phytotoxic metabolites. In this study, cycloheximide (CH) and acetoxycycloheximide (ACH) were isolated from the fermentation broth of sp. JCK-6092.

Response of Pine Rhizosphere Microbiota to Foliar Treatment with Resistance-Inducing Bacteria against Pine Wilt Disease.

In this study, two bacterial strains, IRP7 and IRP8, were selected to induce resistance against pine wilt disease (PWD). Foliar application with these strains to nematode-inoculated pine seedlings significantly reduced PWD severity. The effect of nematode inoculation and bacterial treatment on the rhizosphere bacterial community was investigated.

Comparative Transcriptome Analysis of Pine Trees Treated with Resistance-Inducing Substances against the Nematode .

The pinewood nematode (PWN) causes pine wilt disease, which results in substantial economic and environmental losses across pine forests worldwide. Although systemic acquired resistance (SAR) is effective in controlling PWN, the detailed mechanisms underlying the resistance to PWN are unclear. Here, we treated pine samples with two SAR elicitors, acibenzolar--methyl (ASM) and methyl salicylic acid (MeSA) and constructed an in vivo transcriptome of PWN-infected pines under SAR conditions.

Greenness, civil environment, and pregnancy outcomes: perspectives with a systematic review and meta-analysis.

Background: Various maternal conditions, especially in utero conditions and prenatal exposure to environments with air pollution and greenness, have been reviewed to address the enhancement and prevention of susceptibility to health risks, including low birthweight, preterm delivery, and preeclampsia. This study aimed to qualitatively and quantitatively investigate the associations between pregnancy outcomes and the characteristics of surrounding living environment, including greenness, air pollution, and civilization.

Methods: A secondary search of the MEDLINE, EMBASE, Cochrane Library, K-eArticles, and CINAHL databases was conducted without language restrictions to identify the relevant publications from the time of inception of the databases to April 2019.