rhizobium spp. isolates as biocontrol agents of bean damping-off, caused by rhizoctonia solani

Authors

سمانه سماوات

دانش آموخته کارشناسی ارشد پردیس کشاورزی و منابع طبیعی دانشگاه تهران و عضو باشگاه پژوهشگران جوان، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران مسعود احمدزاده

دانشیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج کیوان بهبودی

استادیار، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج

abstract

the antagonistic effects of rhizobium spp. isolates against rhizoctonia solani (ag-4), the causal agent of bean damping-off were compared with each other in either of the in vitro and in vivo conditions. also their potential to produce such secondary antifungal metabolites as hcn, siderophore and protease were evaluated. the results indicated that, isolate rh3 reduced mycelial growth of r. solani more than the others did in vitro conditions. isolates rh4, (rh6, rh3) and rh6 produced the highest siderophore, protease and hcn, respectively. under greenhouse conditions, strilized soil was used to evaluate the effect of seed coatings with bacterial isolates on disease incidence, percentage of disease control and as well on growth factors. isolates rh5 and rh4 indicated the highest level of plant dry weight in the presence of pathogen. although none of the bacterial isolates could suppress the disease completely under greenhouse conditions, rh3 isolate could control the disease to an extent more than 80%. the obtained results indicated that the biocontrol potential of rhizobium isolates not only led to an alleviation of the disease but also promoted plant growth. then such bacterial isolates can be successfully applied in sustainable agricultural production systems.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Interactions Between Vascular Arbuscular Mycorrhizal Fungi And Streptomyces As Biocontrol Agent For Tomato Damping-Off Disease Caused By Rhizoctonia SolaniKuhn

The most popular and important plant Lycopersicon esculentum Mill or Tomato was attacked by several fungal pathogens and several biocontrol agents can be used. Mycorrhizal fungi are mutuality associated with many plant rootswhile actinomycete isolates of the genus Streptomyces enhanced plant growth and decreased plant pathogen development. Thus, interaction between Mycorrhizae and Streptomyces ...

full text

Liquid culture production of microsclerotia and submerged conidia by Trichoderma harzianum active against damping-off disease caused by Rhizoctonia solani.

Media and culturing protocols were identified that supported the formation of submerged conidia and microsclerotia (MS) by Trichoderma harzianum Rifai strain T-22 using liquid culture fermentation. Liquid media with a higher carbon concentration (36 g L(-1)) promoted MS formation at all C:N ratios tested. Hyphae aggregated to form MS after 2 d growth and after 7 d MS were fully melanized. This ...

full text

a survey on biocontrol of rhizoctonia solani kuhn damping-off of tomato with bacillus subtilis

in this research, the antagonistic effects of bacillus subtilis isolates against the causal agent of tomato damping-off, rhizoctonia solani were surveyed under laboratory and greenhouse conditions. isolates b4 and b18 showed the most inhibition ratio in the volatile and non-volatile metabolites tests which were 50.3% and 58.6% respectively. the six out of 25 isolates studied more and their anta...

full text

Biological Control of Damping - Off Caused by Pythium ultimum and Rhizoctonia solani with Gliocladium virens in Soilless Mix

Lumsden, R. D., and Locke, J. C. 1989. Biological control of damping-off caused by Pythium ultimum and Rhizoctonia solani with Gliocladium virens in soilless mix. Phytopathology 79:361-366. Gliocladium virens controlled damping-off of zinnia, cotton, and Disease control efficacy lasted for at least 2 mo when G. virens was cabbage caused by Pythium ultimum or Rhizoctonia solani in nonsterile int...

full text

In vitro Evaluation of Biocontrol Agents Against Damping Off Disease Caused by Pythium debaryanum on Tomato

Damping-off diseases incited by different species of Pythium are a persistent problem worldwide, often resulting in reduced yields and occasionally resulting in major crop damage. There have been increasing restrictions on the use of chemical fungicides, and the development of disease-suppressive biocontrol agents has become a major goal of horticulture crops. An experiment was conducted with t...

full text

Screening of bioagents against root rot of mung bean caused by Rhizoctonia solani.

A laboratory and green house experiment was carried out on the comparative antagonistic performance of four different bioagents (Aspergillus sp., Gliocladium virens, Trichoderma harzianum and T. viride) isolated from soil against Rhizoctonia solani. Under laboratory conditions, T. harzianum exhibited maximum (75.55%) mycelial growth inhibition of R. solani This was followed by T. viride, which ...

full text

My Resources

Save resource for easier access later


Journal title:
دانش گیاه پزشکی ایران

جلد ۴۳، شماره ۲، صفحات ۲۹۵-۳۰۱

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023