Ecological functions of volatiles produced by plant growth-promoting micro-organisms

Zhou, Jiayu; Dai, Chuan-chao; Chen, Yan; Yang, Teng

doi:10.3724/sp.j.1011.2013.00141

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“…These characteristics give them the advantages over other secondary metabolites of microbial nature, being able to travel long distances to mediate interactions between organisms that are not in direct contact and to be perceived at low concentrations. Therefore, VOCs are now widely used in the prevention and treatment of plant diseases [ 12 ]. Xie et al [ 13 ] found that Bacillus subtilis DZSY21 strongly inhibited the growth of Curvularia lunata by producing VOCs and that 2-methylbutyric acid, 2-heptanone, and isoamyl acetate in the VOCs of strain DZSY21 were detected to inhibit mycelial growth and conidiophore formation in C. lunata .…”

Section: Introductionmentioning

confidence: 99%

Effects of Volatile Organic Compounds Produced by Pseudomonas aurantiaca ST-TJ4 against Verticillium dahliae

Kong

2022

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Verticillium dahliae is one of the most destructive fungal pathogens, causing substantial economic losses in agriculture and forestry. The use of plant growth-promoting rhizobacteria (PGPR) is an effective and environmentally friendly strategy for controlling diseases caused by V. dahliae. In this study, 90 mm in diameter Petri plates were used to test the effect of volatile organic compounds (VOCs) produced by different concentrations of Pseudomonas aurantiaca ST-TJ4 cells suspension on V. dahliae mycelia radial growth and biomass. The mycelial morphology was observed by using scanning electron microscopy. The conidia germination and microsclerotia formation of V. dahliae were evaluated. The VOCs with antifungal activity were collected by headspace solid-phase microextraction (SPME), and their components were analyzed by gas chromatography-mass spectrometry (GC-MS). The VOCs produced by strain ST-TJ4 significantly inhibited the growth of mycelium of V. dahliae. The morphology of the hyphae was rough and wrinkled when exposed to VOCs. The VOCs of strain ST-TJ4 have a significant inhibitory effect on V. dahliae conidia germination and microsclerotia formation. At the same time, the VOCs also reduce the expression of genes related to melanin synthesis in V. dahliae. In particular, the expression of the hydrophobin gene (VDAG-02273) was down-regulated the most, about 67-fold. The VOCs effectively alleviate the severity of cotton root disease. In the volatile profile of strain ST-TJ4, 2-undecanone and 1-nonanol assayed in the range 10–200 µL per plate revealed a significant inhibitory effect on V. dahliae mycelial radial growth. These compounds may be useful to devise new control strategies for control of Verticillium wilt disease caused by V. dahliae.

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Section: Introductionmentioning

confidence: 99%

Effects of Volatile Organic Compounds Produced by Pseudomonas aurantiaca ST-TJ4 against Verticillium dahliae

Kong

2022

JoF

View full text Add to dashboard Cite

show abstract

Ecological functions of volatiles produced by plant growth-promoting micro-organisms

Cited by 1 publication

References 0 publications

Effects of Volatile Organic Compounds Produced by Pseudomonas aurantiaca ST-TJ4 against Verticillium dahliae

Effects of Volatile Organic Compounds Produced by Pseudomonas aurantiaca ST-TJ4 against Verticillium dahliae

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