Unravelling the potential of effective seed bacterial endophyte in groundnut for stem rot disease (Sclerotium rolfsii) management: Unravelling the potential of effective seed bacterial endophyte in groundnut for stem rot disease (Sclerotium rolfsii) management

T ARCHANA; L RAJENDRAN; S K MANORANJITHAM; V P SANTHANA KRISHNAN; G KARTHIKEYAN

doi:10.56739/rjyddq55

Authors

T ARCHANA Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu
L RAJENDRAN Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu
S K MANORANJITHAM Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu
V P SANTHANA KRISHNAN Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu
G KARTHIKEYAN Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu

https://doi.org/10.56739/rjyddq55

Keywords:

Antagonistic activity, Stem rot, Seed bacterial endophytes, Thermostable and pot culture study

Abstract

Groundnut (Arachis hypogaea L.) is known as “King of oilseeds” which is grown extensively in both Kharif and Rabi/Summer seasons.Several among the several pathogens, Stem rot caused by Sclerotium rolfsii Sacc. causes the yield loss up to 80 per cent during favourable conditions. Hence, an attempt has been made to isolate bacterial endophytes for biocontrol management from peanut seeds as an alternative approach. Sixteen isolates (EGN1- EGN16) isolated from peanut were tested against Sclerotium rolfsii under in vitro. Further, the effective isolates were further analyzed for the presence of thermo stable compounds, profiling of secondary metabolites through GC-MS analysis, growth promotion test (rhizo scanner) and pot culture experiment. The results showed that talc formulation of effective isolate EGN 1 (Pseudomonas sp.) significantly increased the vigour index (4902.81), germination rate (91.3per cent), root length (28.1 cm) and shoot length (25.6 cm) along with the simultaneous reduction in disease incidence of 5.54 %.

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References

Nisa, S., Shoukat, M., Bibi, Y., Al Ayoubi, S., Shah, W., Masood, S., and Qayyum, A. (2022). Therapeutic prospects of endophytic Bacillus species from Berberis lycium against oxidative stress and microbial pathogens. Saudi Journal of Biological Sciences, 29(1), 287-295. DOI: https://doi.org/10.1016/j.sjbs.2021.08.099

Dhar Purkayastha, Gargee, Preeti Mangar, Aniruddha Saha, and Dipanwita Saha. 2018. "Evaluation of the biocontrol efficacy of a Serratia marcescens strain indigenous to tea rhizosphere for the management of root rot disease in tea." PloS one,13 (2):1-27. DOI: https://doi.org/10.1371/journal.pone.0191761

Unravelling the potential of effective seed bacterial endophyte in groundnut for stem rot disease (Sclerotium rolfsii) management