REPORT OF A NEW RACE OF PLASMOPARA HALSTEDII, THE CAUSAL AGENT OF SUNFLOWER DOWNY MILDEW FROM IRAN

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ALI ZADEH A.; RAHMANPOUR S.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: IRANIAN JOURNAL OF PLANT PATHOLOGY Year:2005 | Volume:41 | Issue:1 Page(s): 19-37

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Title

REPORT OF A NEW RACE OF PLASMOPARA HALSTEDII, THE CAUSAL AGENT OF SUNFLOWER DOWNY MILDEW FROM IRAN

Author(s)

ALI ZADEH A. | RAHMANPOUR S. | Issue Writer Certificate

Keywords

SUNFLOWERQ2

DOWNY MILDEWQ3

PLASMOPARA HALSTEDIIQ4

RACEQ4

Abstract

Downy mildew of SUNFLOWER is considered to be one of the important diseases of this crop in Iran. To determine physiological RACEs of the pathogen and its distribution in the country, 253 diseased samples were collected from 100 SUNFLOWER growing regions including: Golestan, Mazandaran East and West Azarbaijan, Ardabil, Hamadan, Lorestan, Kordestan, Kermanshah, Central and Tehran Provinces during 1995- 1997. Spore suspension was prepared from sporulating samples and inoculated on a susceptible cultivar (Record) immediately after transferring specimens to the laboratory. However, those specimens lacking sporulation due to unfavorable conditions in the regions were first induced to form spores and then used.One-hundred and one representative isolates from 57 regions of the country were selected for RACE determination using differential lines obtained from Canada (DM-2, RHA-274, RHA-266, HA-300, RHA-340, PHA-325, DM3) and France (HA-335, HA-25). Three-day old seedlings were inoculated for three hr- with spore suspension (2x 104 spores/ml) using the whole seedling immersion (WSI) inoculation method. The inoculated seedlings were then planted in the pots containing sand-perlite (2: 3 V/V) and transferred to a greenhouse at 20-24 °C. Reaction of the lines was recorded 2 weeks after inoculation on the basis of sporulation and /or lack of sporulation on cotytodon and true leaves. The majority of isolates caused similar reaction on differential lines, indicating the presence of only a single RACE dominantly exists in most SUNFLOWER growing regions of the country. This RACE is different from previously recorded RACEs of the fungus (Gulya et al. 1998) and is being reported for the first time from Iran. In addition, two more pathotypes, were identified one with a low frequency existing in most affected areas and the other, collected only from three regions. The precise nature of these pathotypes needs further investigation.

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APA: Copy

ALI ZADEH, A., & RAHMANPOUR, S.. (2005). REPORT OF A NEW RACE OF PLASMOPARA HALSTEDII, THE CAUSAL AGENT OF SUNFLOWER DOWNY MILDEW FROM IRAN. IRANIAN JOURNAL OF PLANT PATHOLOGY, 41(1), 19-37. SID. https://sid.ir/paper/48150/en

Vancouver: Copy

ALI ZADEH A., RAHMANPOUR S.. REPORT OF A NEW RACE OF PLASMOPARA HALSTEDII, THE CAUSAL AGENT OF SUNFLOWER DOWNY MILDEW FROM IRAN. IRANIAN JOURNAL OF PLANT PATHOLOGY[Internet]. 2005;41(1):19-37. Available from: https://sid.ir/paper/48150/en

IEEE: Copy

A. ALI ZADEH, and S. RAHMANPOUR, “REPORT OF A NEW RACE OF PLASMOPARA HALSTEDII, THE CAUSAL AGENT OF SUNFLOWER DOWNY MILDEW FROM IRAN,” IRANIAN JOURNAL OF PLANT PATHOLOGY, vol. 41, no. 1, pp. 19–37, 2005, [Online]. Available: https://sid.ir/paper/48150/en

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