Reaction of Wheat Varieties to Infection by Pythium
arrhenomanes or its Toxic Metabolite (s)

Mojdehi, H.; Singleton, L. L.

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Tarbiat Modares University Press

Journal of Agricultural Science and Technology

Volume 2, Issue 1 (2000) JAST 2000, 2(1): 33-39 | Back to browse issues page

‎ 20.1001.1.16807073.2000.2.1.2.8

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Mojdehi H, Singleton L L. Reaction of Wheat Varieties to Infection by Pythium arrhenomanes or its Toxic Metabolite (s). JAST 2000; 2 (1) :33-39
URL: http://jast.modares.ac.ir/article-23-1786-en.html

Reaction of Wheat Varieties to Infection by Pythium arrhenomanes or its Toxic Metabolite (s)

H. Mojdehi ^*

¹, L. L. Singleton²

1- Islamic Azad University, Tehran, Islamic Republic of Iran.
2- Departement of Plant Pathology, Oklahoma State University, Stillwater, Ok. 74078, U.S.A.

Abstract: (5913 Views)

Eight wheat varieties some of which were earlier reported to be resistant to Pythium arrhennmanes, were inoculated with P. arrhenomanes. Inoculation was performed by placing 2-day-old seedlings on the edge of a P. arrhenomanes culture on corn meal agar for 3 h at 25°C. Infected seedlings were then transferred to test tubes (9 mm dia.) containing glass beads and 1 ml of sterile water, and incubated for 4 days at 25°O Non-inoculated seedlings were exposed to the toxic metabolite(s) from P. arrhenomanes by placing them in test tubes containing 1 ml of a 25-day-old culture filtrate of P. arrhenomanes. Non-inoculated seedlings grown in test tubes containing sterile water served as controls. Measurements were taken on root and shoot length, as well as fresh and dry root and shoot weights. There was an indication that it may be possible to use the toxic metabolite(s) in screening for resistance to P. arrhenomanes. Although all of the varieties appeared to be susceptible, there were some differences among them in their reaction to fungal infection or exposure to the toxic metabolite(s).

Keywords: Wheat, Resistance, Pythium arrhenomanes, Toxic metaholite(s)

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Received: 2010/03/15 | Accepted: 2010/03/15 | Published: 2010/03/15

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