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Prevalence of groundnut dry root rot (Macrophomina phaseolina (Tassi) Goid.) and its pathogenic variability in Southern India

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Relation http://oar.icrisat.org/12516/
https://www.frontiersin.org/articles/10.3389/ffunb.2023.1189043/full
https://doi.org/10.3389/ffunb.2023.1189043
 
Title Prevalence of groundnut dry root rot (Macrophomina phaseolina (Tassi) Goid.) and its pathogenic variability in Southern India
 
Creator Pamala, P J
Jayalakshmi, R S
Vemana, K
Naidu, G M
Varshney, R K
Sudini, H K
 
Subject Molecular Biology
Groundnut
Plant Pathology
 
Description Macrophomina phaseolina is the most devastating and emerging threat to groundnut production in India. An increase in average temperature and inconsistent rainfalls resulting from changing climatic conditions are strongly believed to aggravate the disease and cause severe yield losses. The present study aims to conduct a holistic survey to assess the prevalence and incidence of dry root rot of groundnut in major groundnut growing regions of Southern India, viz., Andhra Pradesh, Telangana, Karnataka, and Tamil Nadu. Furthermore, the pathogenic variability was determined using different assays such as morphological, cultural, pathogenic, and molecular assays. Results indicate that disease incidence in surveyed locations ranged from 8.06 to 20.61%. Both temperature and rainfall played a major role in increasing the disease incidence. The pathogenic variability of M. phaseolina isolates differed significantly, based
on the percent disease incidence induced on cultivars of JL-24 groundnut and K-6 groundnut. Morphological variations in terms of growth pattern, culture color, sclerotia number, and sclerotia size were observed. The molecular characterization of M. phaseolina isolates done by ITS rDNA region using ITS1 and ITS4 primers yielded approximately 600 bp PCR amplicons, sequenced and deposited in GenBank (NCBI). Molecular variability analysis using SSR primers indicated the genetic variation among the isolates collected from different states. The present investigation revealed significant variations in pathogenic variability among isolates of M. phaseolina and these may be considered important in disease management and the development of resistant cultivars against groundnut dry root rot disease.
 
Publisher Frontiers Media
 
Date 2023-12-04
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights cc_by
 
Identifier http://oar.icrisat.org/12516/1/Frontiers%20in%20Fungal%20Biology_4-01-16_2023.pdf
Pamala, P J and Jayalakshmi, R S and Vemana, K and Naidu, G M and Varshney, R K and Sudini, H K (2023) Prevalence of groundnut dry root rot (Macrophomina phaseolina (Tassi) Goid.) and its pathogenic variability in Southern India. Frontiers in Fungal Biology, 4. 01-16. ISSN 2673-6128