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2012 (Vol. 4, Issue: 3)
Article Information:

Identification of Resistance to Pythium ultimum in Sunflower Seedlings

Mohammad R. Asgharipour
Corresponding Author:  Mohammad R. Asgharipour 

Key words:  Germination, resistance, seed, suspension, zoospore, ,
Vol. 4 , (3): 273-274
Submitted Accepted Published
December 23, 2011 January 21, 2012 April 05, 2012

In order to evaluate Pythium-mediated damping-off a laboratory experiment was conducted at Biotech Research Center of the University of Zabol, in 2010. The experimental design was a completely randomized with seven genotypes, together with seven replicates. The seeds were inoculated in oospore suspension of fungi (105 mg/mL) for 1 min. After 5 days, seedlings were evaluated with an aim to counting non-germinated seeds, abnormal seedlings and healthy seedlings. Then the healthy seedlings were planted in pots after infecting seedlings through a piece of paper towels contaminated with fungal suspension, and normal seedlings were counted after 12 days. The result showed that there were significant differences among the genotypes for all evaluated traits. The greatest non-germinated seeds were observed in Azargol with 38% and followed by Record and Allstar. Azargol also had the highest abnormal seedlings (86%) and the minimum abnormal seedlings were observed in Xaria with 72%. Regarding normal seedlings at pot, Golshid and Hysun- 33 were superior with 60 and 49%, respectively. These findings suggest that all genotypes had a high susceptibility to P. ultimum. Also, results obtained from the paper towel experiment were different to the results of the soil.
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  Cite this Reference:
Mohammad R. Asgharipour, 2012. Identification of Resistance to Pythium ultimum in Sunflower Seedlings.  Current Research Journal of Biological Sciences, 4(3): 273-274.
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ISSN (Online):  2041-0778
ISSN (Print):   2041-076X
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