4-Hydroxy-3-methyl-2(1H)-quinolone, originally discovered from a Brassicaceae plant, produced by a soil bacterium of the genus Burkholderia sp.: determination of a preferred tautomer and antioxidant activity

• Dandan Li,
• Naoya Oku,
• Yukiko Shinozaki,
• Yoichi Kurokawa and
• Yasuhiro Igarashi

Beilstein J. Org. Chem. 2020, 16, 1489–1494, doi:10.3762/bjoc.16.124

• Alternaria alternata [36], staphyloxanthin from a firmicute Staphylococcus aureus [37], vitamin B6 from fungi Cercospora nicotianae, [38] and Rhizoctonia solani [39], and a melanin-like pigment from Burkholderia cenocepacia [40]. The antioxidant activity of 1 was evaluated using the luminol chemiluminescence

Aspergiloid I, an unprecedented spirolactone norditerpenoid from the plant-derived endophytic fungus Aspergillus sp. YXf3

• Zhi Kai Guo,
• Rong Wang,
• Wei Huang,
• Xiao Nian Li,
• Rong Jiang,
• Ren Xiang Tan and
• Hui Ming Ge

Beilstein J. Org. Chem. 2014, 10, 2677–2682, doi:10.3762/bjoc.10.282

• avenae subsp. Citrulli, Erwinia amylovora, Pseudomonas syringae pv. Lachrymans, Clavibacter michiganense subsp. Sepedonicus, and Pectobacterium carotovorum subsp. carotovorum) and fungi (Rhizoctonia solani Kühn, Rhizotonia cerealis van der Hoeven, Phytophthora capsici Leonian, Fusarium moniliforme Sheld

• , Clavibacter michiganense subsp. Sepedonicus, and Pectobacterium carotovorum subsp. carotovorum) and fungi (Rhizoctonia solani Kühn, Rhizotonia cerealis van der Hoeven, Phytophthora capsici Leonian, Fusarium moniliforme Sheld, Alternaria solani Jones et Grout, Sclerotinia sclerotiorum de Bary, Fusarium

Encapsulation of biocides by cyclodextrins: toward synergistic effects against pathogens

• Véronique Nardello-Rataj and
• Loïc Leclercq

Beilstein J. Org. Chem. 2014, 10, 2603–2622, doi:10.3762/bjoc.10.273

• ingredient dose. The authors reported that when the inclusion complex is used directly with solid culture medium, a fungistatic activity against Alternaria tenuis, Rhizoctonia solani and Sclerotinia sclerotiorum is obtained between 0.1 and 20 µg/mL. The fungistatic effects manifest in the modification of

Cuevaenes C–E: Three new triene carboxylic derivatives from Streptomyces sp. LZ35ΔgdmAI

• Jing-Jing Deng,
• Chun-Hua Lu,
• Yao-Yao Li,
• Shan-Ren Li and
• Yue-Mao Shen

Beilstein J. Org. Chem. 2014, 10, 858–862, doi:10.3762/bjoc.10.82

• ., Bacillus subtilis strain ATCC 11060) and modest activity against fungi (e.g., Fusarium verticillioides strain S68 and Rhizoctonia solani strain GXE4). However, cuevaenes D (4) and E (5) showed no inhibitory activity against any of the tested microbes. Keywords: antibacterial activity; cuevaenes

• (diameters of inhibitory zones 11.5, 12.3 and 14.2 mm, respectively) at 30 μg/disc, and modest activity against fungi such as Fusarium verticillioides strain S68 and Rhizoctonia solani strain GXE4 at 30 μg/disc. Interestingly, cuevaenes D (4) and E (5) showed no inhibitory activity against all tested

• grown on LB agar. The fungus Fusarium verticillioides strain S68 and Rhizoctonia solani strain GXE4 were grown on potato dextrose agar. Test compounds were absorbed onto individual paper disks (6 mm diameter) at 30 μg/disc and placed on the surface of the agar. The assay plates were incubated at 28 °C

The myxocoumarins A and B from Stigmatella aurantiaca strain MYX-030

• Tobias A. M. Gulder,
• Snežana Neff,
• Traugott Schüz,
• Tammo Winkler,
• René Gees and
• Bettina Böhlendorf

Beilstein J. Org. Chem. 2013, 9, 2579–2585, doi:10.3762/bjoc.9.293

• P. nodorum (all at 2 mg/L), with no activity against Pythium ultimum and Rhizoctonia solani. So far, no insecticidal and herbicidal activities have been observed. Due to the problems arising from the lacking culturability of the producing strain S. aurantiaca, further tests with 7 were so far not

• (Pythium ultimum Trow; Rhizoctonia solani Kühn) or conidia of the fungus from cryogenic storage (B. cinerea; P. nodorum; P. grisea; Fusarium culmorum (Wm. G. Sm.) Sacc.) were directly mixed into PDB potato dextrose broth. 10 µL test solution in DMSO (2%) of different concentration of 7 was placed into

Volatile organic compounds produced by the phytopathogenic bacterium Xanthomonas campestris pv. vesicatoria 85-10

• Teresa Weise,
• Marco Kai,
• Anja Gummesson,
• Armin Troeger,
• Stephan von Reuß,
• Silvia Piepenborn,
• Francine Kosterka,
• Martin Sklorz,
• Ralf Zimmermann,
• Wittko Francke and
• Birgit Piechulla

Beilstein J. Org. Chem. 2012, 8, 579–596, doi:10.3762/bjoc.8.65

• , undecan-2-one, dodecan-2-one, and the newly synthesized 10-methylundecan-2-one in bi-partite Petri dish bioassays revealed growth promotions in low quantities (0.01 to 10 μmol), whereas decan-2-one at 100 μmol caused growth inhibitions of the fungus Rhizoctonia solani. Volatile emission profiles of the

• bacteria were different for growth on media (nutrient broth) with or without glucose. Keywords: Aspergillus nidulans; Fusarium solani; growth inhibition and promotion; methylketones; 10-methylundecan-2-one; Rhizoctonia solani; volatile organic compound (VOC); Xanthomonas campestris pv. vesicatoria

• other organisms, three fungi, Aspergillus nidulans, Fusarium solani and Rhizoctonia solani, were cocultivated with X. c. pv. vesicatoria 85-10 in compartmentalized Petri dishes (Figure 1). This ensures that only volatiles can diffuse between the compartments to act on the fungal test organisms. Since it

A facile synthesis and fungicidal activities of 2-(alkylamino)-5,6-dimethylthieno[2,3-d]pyrimidin- 4(3H)-ones

• Yang-Gen Hu,
• Ai-Hua Zheng,
• Xu-Zhi Ruan and
• Ming-Wu Ding

Beilstein J. Org. Chem. 2008, 4, No. 49, doi:10.3762/bjoc.4.49

• listed in Table 1. Fungicidal activity The fungicidal activities of compounds 6 and 8 were screened against six kinds of fungi, Fusarium oxysporum, Rhizoctonia solani, Botrytis cinerea, Gibberella zeae, Dothiorella gregaria, Colletotrichum gossypii at a concentration of 50 mg/L according to the reported