Morphological and Pathogenic Variability among Isolates of Xanthomonas oryzae pv. oryzae, Causal Agent of Bacterial Leaf Blight of Rice from Godavari Zone of Andhra Pradesh
Shanmuki Shirisha P1*, Ramabhadra Raju M2, Madhusudhan P3, Sandhya Rani C4, Srinivas T5, Bhuvaneswari V6 and Deepthi Priya B7
1 Department of Plant Pathology, Agricultural College, Bapatla (ANGRAU), Andhra Pradesh
2,7 Department of Plant Pathology, ARS, Peddapuram (ANGRAU), Andhra Pradesh
3 Department of Plant Pathology, ARS, Nellore
4 Department of Entomology, Agriculture College, Bapatla
5 Department of Genetics and Plant Breeding RARS, Maruteru
6 Department of Plant Pathology RARS, Maruteru
*Corresponding author Email: sirishapasam038@gmail.com
Volume 18-(2), 2025 ; https://doi.org/10.58297/PBZA1175 Click here for Pdf
Abstract
Bacterial leaf blight (BLB) of rice, caused by Xanthomonas oryzae pv. oryzae (Xoo), is a major biotic constraint in rice cultivation and is widespread across India. Present study was undertaken to assess morphological, biochemical and pathogenic variability among the twenty isolates of Xanthomonas oryzae pv. oryzae collected from major rice growing areas of Godavari zone of Andhra Pradesh. Variation in colony size, colour, margin, appearance, texture and pigmentation were observed among the isolates. However, all the isolates were gram negative and tested positive for KOH test, catalase test, and starch hydrolysis test while, tested negative for oxidase test. In the pot study, Xoo isolates varied in their pathogenic ability in terms on lesion development post artificial inoculation (leaf clip method) on the three rice cultivars viz., BPT-5204, TN-1, and MTU 7029 under study. Xoo isolates from Konaseema district were found more virulent followed by isolates from Kakinada, West Godavari, Eluru and East Godavari districts.
→Next
- Variability and Interrelationships for Yield and Yield Related Traits in Land Races of Rice (Oryza sativa
L.) - Diversity Analysis of Red Rice (Oryza sativa L.) Genotypes for Yield and Grain Zinc, Iron and Protein
Content - Studies on Genetic Variability, Heritability and Genetic Advance for Quantitative Traits in Red Rice
(Oryza sativa L.) Mutant Lines. - Dithizone Screening Protocol to Select Promising Rice with High Grain Zinc Content
- Comparison of Different Establishment Methods of Rice for above Ground Dry Matter Accumulation
as Influenced by Microbial Consortia and Zinc Fertilization - Effect of Brown Manuring and Herbicide Application on Yield Attributes and Soil Status of Aerobic Rice
under Varying Planting Geometry - Integrated Evaluation of ‘Geoxol.com’ and Organic Manures on Soil Health and Rice Productivity
Under Irrigated Conditions - Histopathological Studies of Fusarium moniliforme in Basmati Rice Varieties
- Response of Seedling Root Dip Treatments against Yellow Stem Borer, Scirpophaga incertulas (Walker)
Infesting Rice Crop - Evaluation of Insecticide Botanical Modules against Scirpophaga incertulas and Cnaphalocrocis medinalis
in Rice - Possible Detection of the Rice Gall Midge (Orseolia oryzae) Resistance Genes in Rice Genotypes Using
Relevant Markers - JGL 35085 (IET 29142) – A Short Duration and High Yielding Variety Suitable for Bihar and West
Bengal of Zone III - KAU Punya (MO 25): A High Yielding Red Kernelled Rice Variety for Kuttanad
- KAU Aadhya (MO 24): A High Yielding White Kernelled Rice Variety for Kerala
- BPT Rice 2841- A Lysine Rich Black Rice Variety Suitable for Raw Rice