Herbicidal Secondary Metabolites from Actinomycetes: Structure Diversity, Modes of Action, and Their Roles in the Development of Herbicides

Shi, Liqiao; Wu, Zhimin; Zhang, Yani; Zhang, Zhigang; Fang, Wei; Wang, Yueying; Wan, Zhongyi; Wang, Kaimei; Ke, Shaoyong

doi:10.1021/acs.jafc.9b06126

Cited by 31 publications

(18 citation statements)

References 165 publications

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“…Studies have already demonstrated actinomycetes metabolites active against bacteria (27), fungi (28), viruses (29), nematodes (30), and insects (31), as well as compounds with antitumor (32) and herbicide (33) activities. Some species can also produce enzymes of industrial interest, such as chitinases, cellulases, and amylases (34), and enzymes involved in plant growth promotion, like phosphatases and nitrogenases (35).…”

Section: Actinomycetes: a Rich Source Of Bioactive Compoundsmentioning

confidence: 99%

The Potential Use of Actinomycetes as Microbial Inoculants and Biopesticides in Agriculture

et al. 2022

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The use of fertilizers and chemical pesticides promotes significant improvements in crop development, but some problems and risks associated with them limit their application. An alternative is using biological inputs based on microorganisms, increasing production while combining efficiency and sustainability. Actinomycetes are a group of bacteria belonging to the phylum Actinobacteria, recently re-named Actinobacteriota. They represent important microbial communities in the soils with increasing agricultural applications, especially in the biological control of insect-pest and plant disease and in plant growth promotion. Studies report their promising use as microbiological inoculants by exploring mechanisms to improve plant development, such as biological nitrogen fixation, phosphate solubilization, production of phytohormones, and other biocompounds. In addition, many species produce metabolic pathways that generate high-value antibiotics, extracellular enzymes and secondary metabolites other than antimicrobials, with potential in the control of phytopathogenic fungi, insects, and nematodes. These actinomycetes could be used to formulate novel bioinoculants composed of spores and/or mycelium. Considering that the research in this field is up-and-coming, with significant economic and environmental impacts in the future, this review aims to group the most relevant works that explore the biodiversity of actinomycetes, helping to develop inoculants and biodefensives for more productive and conscious agriculture.

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Section: Actinomycetes: a Rich Source Of Bioactive Compoundsmentioning

confidence: 99%

The Potential Use of Actinomycetes as Microbial Inoculants and Biopesticides in Agriculture

et al. 2022

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“…rbES331 (Table 2) that also showed antifungal activity through diffusible compounds. Actinobacteria produce diverse secondary metabolites that inhibit different biological pathways in microorganisms and plants [64]. For example, the non-proteinogenic amino acid 4-Chlorothreonine, isolated from Streptomyces sp.…”

Section: Discussionmentioning

confidence: 99%

Rhizobacteria Associated with a Native Solanaceae Promote Plant Growth and Decrease the Effects of Fusariumoxysporum in Tomato

2021

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Plant growth-promoting rhizobacteria are often utilized to improve crop health and productivity. Nevertheless, their positive effects can be hindered if they fail to withstand the environmental and ecological conditions of the regions where they are applied. An alternative approach to circumvent this problem is a tailored selection of bacteria for specific agricultural systems. In this work, we evaluated the plant growth promoting and pathogen inhibition activity of rhizobacteria obtained from the rhizosphere of Mariola (Solanum hindsianum), an endemic shrub from Baja California. Eight strains were capable of inhibiting Fusarium oxysporum in vitro, and thirteen strains were found to possess three or more plant-growth-promotion traits. Molecular identification of these strains, using 16 s rRNA partial sequences, identified them as belonging to the genera Arthrobacter, Bacillus, Paenibacillus, Pseudomonas, and Streptomyces. Finally, the effect of selected plant growth-promoting rhizobacteria (PGPR) strains on the growth and suppression of Fusarium wilt in tomato was evaluated. Results showed that these strains improved tomato plants growth under greenhouse conditions and reduced Fusarium wilt effects, as reflected in several variables such as length and weight of roots and stem. This work highlights the potential of native plants related to regionally important crops as a valuable source of beneficial bacteria.

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“…Therefore, there is an urgent need for expansion of crop production. However, weeds have always affected the growth and development of crops by the competition for light, space, nutrients, and water, leading to severe reductions in global crop yields . Synthetic herbicides have played a pivotal role in weed management by increasing both crop quality and yield and reducing labor costs .…”

Section: Introductionmentioning

confidence: 99%

Ethylidene-Tethered Chromene–Pyrone Hybrids as Potential Plant-Growth Regulators from an Endolichenic Phaeosphaeria Species

Zhai

Zhang

Gao

et al. 2023

J. Agric. Food Chem.

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Phaeosphaeria sp., a lichen-associated fungus, produced six skeletally new dimeric spiciferones (1–6) and four known metabolites (7–10). The new structures were elucidated by spectroscopic analysis, and their absolute configurations were determined by electronic circular dichroism calculations. Compounds 1 and 3–6 represent the first examples of ethylidene-bridged dimers from the building blocks 4H-chromene-4,7(8H)-dione and α-pyrone, and 2 is a unique homodimer of spiciferone. Compounds 1, 2, and 5–9 significantly inhibited the growth of weed-like dicot Arabidopsis thaliana at 100.0 μM. Notably, 8 showed the strongest inhibitory activity against the fresh weight and root elongation of A. thaliana with the IC50 values of 32.04 and 26.78 μM, respectively, whereas 1, 8, and 9 stimulated the growth of A. thaliana at lower concentrations. Meanwhile, compounds 2 and 6 exhibited weak inhibitory effects on the root elongation of monocot rice, while 1 and 8 exhibited growth-promoting effects on the shoot and root elongation of rice in a roughly dose-dependent manner.

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Herbicidal Secondary Metabolites from Actinomycetes: Structure Diversity, Modes of Action, and Their Roles in the Development of Herbicides

Cited by 31 publications

References 165 publications

The Potential Use of Actinomycetes as Microbial Inoculants and Biopesticides in Agriculture

The Potential Use of Actinomycetes as Microbial Inoculants and Biopesticides in Agriculture

Rhizobacteria Associated with a Native Solanaceae Promote Plant Growth and Decrease the Effects of Fusariumoxysporum in Tomato

Ethylidene-Tethered Chromene–Pyrone Hybrids as Potential Plant-Growth Regulators from an Endolichenic Phaeosphaeria Species

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