AIP conference proceedings, Год журнала: 2023, Номер 2777, С. 020051 - 020051
Опубликована: Янв. 1, 2023
Язык: Английский
Plants, Год журнала: 2023, Номер 12(3), С. 577 - 577
Опубликована: Янв. 28, 2023
Botrytis cinerea is the most harmful postharvest disease of table grapes. Among strategies that can be envisaged for its control, use coatings based on natural products particularly promising. The study presented herein focuses assessment antagonistic capacity two Streptomyces species and their culture filtrates against B. cinerea. Firstly, secondary metabolites were characterized by gas chromatography-mass spectrometry, with N1-(4-hydroxybutyl)-N3-methylguanidine acetate 2R,3S-9-[1,3,4-trihydroxy-2-butoxymethyl]guanine as main compounds produced S. lavendofoliae DSM 40217; cyclo(leucyloprolyl) cyclo(phenylalanylprolyl) abundant chemical rochei 41729. Subsequently, 40217 41729 to inhibit growth pathogen was tested in dual plate assays, finding 85-90% inhibition. In agar dilution tests, resulted effective concentration values (EC90) 246-3013 μg·mL-1 range. Upon formation conjugate complexes chitosan oligomers (COS) improve solubility bioavailability, a synergistic behavior observed, resulting lower EC90 values, ranging from 201 953 μg·mL-1. Ex situ tests carried out 'Timpson' 'Red Globe' grapes using found maintain turgor delay appearance 10-15 days at concentrations 750-1000 µg·mL-1 Hence, COS selected spp. may put forward promising protection treatments sustainable control gray mold.
Язык: Английский
Процитировано
11
Polymers, Год журнала: 2024, Номер 17(1), С. 18 - 18
Опубликована: Дек. 25, 2024
The grapevine industry is confronted with challenges such as plant stress from environmental factors and microbial infections, alongside the need for sustainable waste management practices. Natural polymers offer promising solutions to these issues due their biocompatibility, biodegradability, functional versatility. This review explores dual role of natural in enhancing industry: protective agents against various stressors carriers delivery valuable compounds recovered wastes. We examine use chitosan, alginate, cellulose formulating bio-based coatings treatments that bolster resistance abiotic stress, pathogens, pests. Additionally, delves into innovative utilization residues, including skins, seeds, stems, sources polyphenols other bioactive compounds. These can be efficiently encapsulated polymer matrices applications agriculture, food, pharmaceuticals. Key topics include mechanisms action, benefits, limitations polymer-based interventions, well case studies demonstrating practical implementation vineyards. also addresses future research directions, emphasizing integrated approaches enhance sustainability economic viability industry.
Язык: Английский
Процитировано
3
Horticulturae, Год журнала: 2022, Номер 8(8), С. 672 - 672
Опубликована: Июль 23, 2022
Gray mold (Botrytis cinerea Pers.), crown and fruit rot (Phytophthora cactorum (Lebert Cohn) J.Schröt), verticillium wilt (Verticillium dahliae Kleb.) are among the main diseases that affect strawberry crop. In study presented herein, bark extract of Uncaria tomentosa (Willd. ex Schult.) DC, popularly known as “cat’s claw”, has been evaluated for its capability to act a sustainable control method. The bioactive compounds present in aqueous ammonia were characterized by gas chromatography–mass spectroscopy, antimicrobial activity extract—alone combination with chitosan oligomers (COS)—was assessed vitro coating postharvest treatment during storage. Octyl isobutyrate (30.7%), 19α methyl-2-oxoformosanan-16-carboxylate (9.3%), tetrahydro-2-methyl-thiophene (4.7%), α-methyl manofuranoside (4.4%) identified phytoconstituents. results growth inhibition tests showed that, upon conjugation COS, complete was reached at concentrations 39–93.75 μg∙mL−1 range, depending on pathogen. Concerning effect prolong storage life decay post-harvest storage, high protection observed concentration 1000 μg∙mL−1. Because this effectiveness, higher than attained conventional synthetic fungicides, extracts cat’s claw may hold promise crop protection.
Язык: Английский
Процитировано
15
Plants, Год журнала: 2023, Номер 12(3), С. 635 - 635
Опубликована: Фев. 1, 2023
Oak powdery mildew caused by Erysiphe alphitoides (Griffon and Maubl.; U. Braun & S. Takam.) is a common disease in European forests. One of the most susceptible species pedunculate oak (Quercus robur L.). Presently, few methods are available to control mildew, e.g., use fungicides (e.g., based on citric acid), antagonistic fungi or bacteria, chemical treatments sulphur, potassium bicarbonate) genetic resistance. In our study, we aimed check effects using chitosan derivatives novel active substances inducing plants’ natural resistance: benzodiathiadiazole (both neutral salt form). 84 seedlings were subjected experiment three treatment variants (plus positive negative controls). The plants treated with inoculated E. alphitoides. Although symptoms appeared all variants, they manifested mainly mycelium form small spots. indicated that highest limitation was achieved applying N-methyl-N-methoxyamide-7-carboxybenzo(1,2,3)thiadiazole (BTHWA). application BTHWA reduced development 88.9% when compared other variants.
Язык: Английский
Процитировано
8
Plant Pathology, Год журнала: 2024, Номер 73(5), С. 1238 - 1246
Опубликована: Фев. 28, 2024
Abstract Plant resistance inducers (PRIs) are of increasing interest for disease control in sustainable viticulture, but their efficacy vineyards is still under investigation. We studied the effects four commercial PRIs, natural and microbial origin, on development powdery mildew (PM) grapevine leaves over a 3‐year period. Disease sporulation severity were evaluated following artificial inoculation PRI‐treated with Erysiphe necator conidia at 1, 3, 7 12 days after treatment (DAT). Laminarin (LAM) cos‐oga (COS) most effective reducing both (57.1% 49.5%, respectively) (85.3% 90.2%, severity; reduction PM provided by cerevisane (CER) was lower (27%), that Pythium oligandrum (PYT) intermediate (44.9%). LAM from 1 DAT, while COS PYT more when E . inoculated to DAT. These results open new perspectives how PRIs used as single, preventative interventions performed 3 before infection, depending product used. The effect colonies also suggests broader longer epidemics.
Язык: Английский
Процитировано
2
Journal of Cleaner Production, Год журнала: 2024, Номер 451, С. 142131 - 142131
Опубликована: Апрель 1, 2024
The persistent use of copper-based fungicides to control grapevine downy mildew (GDM) still represents risks both human health and the environment, especially in organic production. This heavy metal can affect wine quality due residues' presence on grape bunches. Implementing sustainable viticultural practices diseases is crucial for industry. work aimed evaluate chitosan effectiveness toward GDM a large scale, over period three years (2019–2021), distinct vineyards with different environmental conditions. Three management strategies were tested: application 0.5% individually; alternation copper; during last year, combination low rate copper, using conventional untreated plants as controls. Over consecutive seasons, treatments effectively reduced McKinney Index leaves bunches under On bunches, alone was less effective than when applied after copper had same effectiveness, combined more standard. In 2020 2021, analysis cooper amount detected berries two cultivars showed that all allowed decrease residue berries. or able reduce this control. scale investigation suggests alternative integrate eventually replace against GDM. Further studies validate these environments, disease pressure conditions cultivar are fundamental towards achieving green solutions strategies.
Язык: Английский
Процитировано
2
Materials, Год журнала: 2022, Номер 15(22), С. 8188 - 8188
Опубликована: Ноя. 18, 2022
Starting from the well-known antimicrobial properties of silver nanoparticles, goal this study is to evaluate influence two "green" recipes, namely an alcoholic extract Dryopteris filix-mas (L.) Schott and a dispersion nanoparticles phytosynthesized using on grapevine pathogens. The some parameters (pith/wood rapport, soluble sugars, starch, total water content, length young shoots, number grapes) in field experiments was also studied. conducted four clones (Feteasca alba 97 St., Feteasca neagra 6 regala 72 Cabernet Sauvignon 131 St.) located vegetation pots inside greenhouse. For phytosynthesis (AgNPs) we used scaled-up technology, allowing us obtain large quantities nanoparticles-containing solution. AgNPs analysis by X-ray diffraction transmission electron microscopy confirmed synthesis spherical quasi-spherical 17 nm average diameter 6.72 crystallite size. registered different responses treatment, both natural extracts Both recipes exhibited protective effect against Uncinula necator pathogen. treatment significant increases pith/wood ratio for white wine St. were observed. biochemical analyses revealed other sugars (red clones-Feteasca Sauvignon/second year), starch 2021 clones), content respectively. applied treatments led increase shoots grape numbers all as compared control (chemical pesticide), which would suggest potential biostimulant recipes.
Язык: Английский
Процитировано
10
Horticulturae, Год журнала: 2023, Номер 9(6), С. 652 - 652
Опубликована: Июнь 1, 2023
The Euphorbia genus is the third-largest group of blooming plants, features a rich morphological variability, has near-cosmopolitan distribution, and diverse medicinal uses. Nonetheless, phytochemical information about serrata L. extracts not available. objective this research was to examine constituents hydromethanolic extract its aerial parts propose valorization pathways. results gas chromatography-mass spectroscopy (GC−MS) demonstrated that 3-methylbutyl formate, quinic acid, N1-(4-hydroxybutyl)-N3-methylguanidine acetate, 2,3-dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one were main phytocompounds, which have antimicrobial activity. Such activity assayed against Pseudomonas cichorii, Botrytis cinerea, Fusarium oxysporum, Sclerotinia sclerotiorum, four most destructive diseases borage (Borago officinalis L.) crops, obtaining minimum inhibitory concentrations (MICs) 750 1000 μg·mL−1 bacterium three fungal taxa, respectively, in vitro tests. Conjugation with chitosan oligomers (COS) enhanced activity, leading MIC values 187.5, 750, 500, 500 for P. B. F. S. respectively. Additional vivo assays two pathogens confirmed protective action COS–E. conjugate complexes on artificially inoculated plants at dose 375 cichorii These findings suggest plant species can be source biorationals prospective use crop protection.
Язык: Английский
Процитировано
5
Notulae Botanicae Horti Agrobotanici Cluj-Napoca, Год журнала: 2023, Номер 51(1), С. 12920 - 12920
Опубликована: Фев. 23, 2023
The objective of this study was to determine the influence chitosan treatments, applied in vineyard for plan protection, on phenolic quality grapes. conducted two consecutive years (2020-2021) wine center Murfatlar, Romania, ‘Fetească neagră’, an ancient but well-known indigenous Romanian grape variety red wines. Chitosan is meant offer alternative classic treatment with Bordeaux mixture (BM), which represented control variant. A combination half dose and BM also evaluated. Chemical composition at harvest time evaluated by measuring content sugar, total acidity, pH, anthocyanin potential (ApH1), anthocyanins extractable pH (ApH3.2), polyphenol index, skin tannins, seed tannins seeds maturity. In wines colour parameters were determined spectrophotometry individual compounds UHPLC-HRMS. grapes, accumulation increased vineyard, higher values 2020 when temperatures rainfall typical region. Accumulation skins followed a similar trend. wine, significant 72% increase intensity 2020. Among phenols gallic acid predominant, rainier year (2021) increases (especially 2021 it 97% as compared treatment). Catechin epicatechin recorded important less favourable (2021), confirmed both elicited chitosan. Quercetin myricetin not influenced treatment, their correlated inversely amount rainfall. Trans-resveratrol ranged between 4.3-8.0 mg L-1 5.0-6.5 2021, (89%
Язык: Английский
Процитировано
4
Plants, Год журнала: 2023, Номер 12(9), С. 1846 - 1846
Опубликована: Апрель 29, 2023
Halophytes are gaining considerable attention due to their applications in saline agriculture, phytoremediation, medicine, and secondary metabolite production. This study investigated the bioactive components present Silene uniflora (sea campion) hydromethanolic extract, antimicrobial activity was evaluated both vitro ex situ against two strawberry phytopathogens, namely Botrytis cinerea (grey mold) Colletotrichum nymphaeae (anthracnose fruit rot). The main identified phytochemicals were mome inositol, saturated fatty acid esters, cyclotetracosane. In tests demonstrated complete inhibition of growth B. C. at extract concentrations 1000 1500 μg·mL-1, respectively, with an comparable that fosetyl-Al substantially higher than azoxystrobin. improved upon conjugation chitosan oligomers (COS), yielding values 750 μg·mL-1. COS-S. conjugate complexes then tested as protective treatments for postharvest storage fruit, resulting high protection artificially inoculated doses 3750 5000 respectively. reported results open door valorization this halophyte a source biorationals protection.
Язык: Английский
Процитировано
4