Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 Jun 26:23:e00354.
doi: 10.1016/j.btre.2019.e00354. eCollection 2019 Sep.

Bioprospecting from plant waste composting: Actinobacteria against phytopathogens producing damping-off

M M Jurado  1 , F Suárez-Estrella  1 , M J López  1 , J A López-González  1 , J Moreno  1
Affiliations

Bioprospecting from plant waste composting: Actinobacteria against phytopathogens producing damping-off

M M Jurado et al. Biotechnol Rep (Amst). .

Erratum in

Abstract

Strains isolated during composting processes of plant waste, and identified as Actinobacteria, proved to be significant producers of compounds that actively participate in the control of phytopathogens, such as those that cause Damping-off disease. Although most of the actinomycetes analyzed showed to be antagonistic strains against common phytopathogens, only some 30% proved to be capable of producing bioactive substances, such as siderophores, salicylic acid, chitinase enzymes or cyanide, so that antibiosis could be considered the most probable antagonistic mechanism for a high proportion of the strains investigated. 6% of the microorganisms identified in this work, were selected as potential strains to be investigated in depth, since they further stimulated plant growth (germination index tests greater than 100%). Microbacteriaceae was one of the most prominent families.

Keywords: Actinobacteria; Biological control; Composting; Damping-off; Plant growth promoting microorganisms.

PubMed Disclaimer

Figures

Fig. 1
Fig. 1
Dispersion graphs of the biocontrol ability of 220 actinobacterial strains 2 grouped by family, against phytopathogens tested (PU, FOM, RS, PCAP). Some 3 representative strains with Inhibition Indices above 50% are labeled in the graphs. All 4 results are means (n = 4 repetitions).
Fig. 2
Fig. 2
Number of positive strains for the production of bioactive substances, 6 grouped by family. SID (a); SAL (b); CHIT (c), and HCN (d). The size of the bubbles 7 represents the number of positive strains related to the total number of strains within 8 each family. All results are means (n = 3 repetitions).
See this image and copyright information in PMC

References

    1. Gravel V., Martinez C., Antoun H., Tweddell R.J. Antagonist microorganisms with the ability to control Pythium damping-off of tomato seeds in rockwool. Biocontrol. 2005;50:771–786.
    1. Mehta C.M., Palni U., Franke-Whittle I.H., Sharma A.K. Compost: its role, mechanism and impact on reducing soil-borne plant diseases. Waste. Manage. 2014;34:607–622. - PubMed
    1. Hwangbo H., Kim K., Choi H. Effects of biocontrol agents on suppression of damping-off in Cucumis sativus L. caused by Rhizoctonia solani. Hortic. Environ. Biote. 2016;57(2):191–196.
    1. Jurado M.M., Suárez-Estrella F., Vargas-García M.C., López M.J., López-González J.A., Moreno J. Evolution of enzymatic activities and carbon fractions throughout composting of plant waste. J. Environ. Manage. 2014;133:355–364. - PubMed
    1. López-González J.A., Suárez-Estrella F., Vargas-García M.C., López M.J., Jurado M.M., Moreno J. Dynamics of bacterial microbiota during lignocellulosic waste composting: studies upon its structure, functionality and biodiversity. Bioresour. Technol. 2015;175:406–416. - PubMed

LinkOut - more resources