VARIABILITY AMONG ISOLATES OF Fusarium oxysporum f. Sp. UDUM CAUSING PIGEONPEA WILT

SANTRAM SAHU¹*, KAMALNARAYAN KOSHALE², R.K.S. TIWARI^3
1Department of Plant Pathology, Indira Gandhi Agricultural University, Raipur, Chhattisgarh, 492012, India
²Department of Plant Pathology, Indira Gandhi Agricultural University, Raipur, Chhattisgarh, 492012, India
³Department of Plant Pathology, Indira Gandhi Agricultural University, Raipur, Chhattisgarh, 492012, India
* Corresponding Author : santramsahu73@gmail.com

Received : 24-01-2017     Accepted : 04-02-2017     Published : 28-02-2017
Volume : 9     Issue : 2       Pages : 850 - 853
Int J Microbiol Res 9.2 (2017):850-853

Keywords : Chlamydospores, Colony, Fusarium, Macroconidia
Academic Editor : Sunil Mandi, S Diengngan, Prajapat Pravin
Conflict of Interest : None declared
Acknowledgements/Funding : Department of Plant Pathology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhatisgarh, India
Author Contribution : All author equally contributed

Cultural and morphological variability were determined among the eight isolates of Fusarium oxysporum f.sp. udum. The colony diameter ranged from 80.00 to 90 mm after nine days of incubation at 28 ± 1ºC. The size of macroconidia ranged from 16.5 to 20.6 μm (18.47 μm) × 2.1 to 4.1 μm (2.98 μm) in RFU to 24.0 to 37.0 μm (30.24 μm) × 2.6 to 4.0 μm (3.52 μm) in BeFU. The size of microconidia varied from 4.9 to 11.8 μm (8.10 μm) × 2.2 to 4.0 μm (2.98 μm) in BeFU to 8.3 to 17.4 μm (12.94 μm) × 2.5 to 5.8 μm (4.0 μm) in RFU. The macro conidia were 1 to 4 septate, fusaroid to sickle shaped. The shape of chlamydospores varied from round in KoFU, RFU, RjFU and BeFU isolates to oval in isolate RgFU and long oval in KFU, MFU and DFU. The size of round chlamydospores ranged from 3.8 to 4.7 μm in RFU to 6.4 to 8.7 μm in diameter in RjFU and long oval chlamydospores were 11 to 13 × 3 to 4 μm in MFU to 19 to 21 × 4 to 5 μm (Length × Breadth) in DFU.