Skip to main content
ARS Home » Plains Area » Lincoln, Nebraska » Wheat, Sorghum and Forage Research » Research » Publications at this Location » Publication #315982
Title: Effect of temperature on wheat streak mosaic virus replication and movement in resistant and susceptible wheat cultivars

Author
item WOSULA, E - University Of Nebraska
item Tatineni, Satyanarayana - Ts
item WEGULO, S - University Of Nebraska
item HEIN, G - University Of Nebraska

Submitted to: American Phytopathological Society Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 5/7/2015
Publication Date: 7/25/2015
Publication URL: http://www.apsnet.org/meetings/Documents/2015_meeting_abstracts/aps2015abP489.htm
Citation: Wosula, E.N., Tatineni, S., Wegulo, S.N., Hein, G.L. 2015. Effect of temperature on wheat streak mosaic virus replication and movement in resistant and susceptible wheat cultivars. American Phytopathological Society Annual Meeting. 117-P.

Interpretive Summary:

Technical Abstract: Wheat streak mosaic virus (WSMV) is an economically important virus causing annual average yield losses of ~2-3% in winter wheat across the Great Plains. Temperature is one of the most important environmental factors that influences disease development and severity. The objective of this study was to determine the extent of WSMV replication and movement in a resistant (‘Mace’) and susceptible (‘Tomahawk’) wheat cultivars at 10, 15, 20 and 25'C. The average number of days to WSMV expression at the point of inoculation increased as temperatures decreased in the range of 4 days (25'C) to 18 days (10'C), but did not differ between the two cultivars. Plants held at 10'C failed to move systemically at 21 days post inoculation, while those at 25'C were systemically infected within 10 days. When plants were moved to 27'C for 14 days, systemic infection in Mace (50 – 85%) was slightly lower than in Tomahawk (90 – 100%). In addition, Mace plants did not display symptoms, while Tomahawk plants had typical WSMV symptoms. Regrowth from cut back plants previously held at 10 and 15'C with no systemic infection expressed WSMV in 20–85% of the plants within 14 days at 27 'C. This study demonstrates that WSMV moves at undetectable levels under suboptimal temperatures, but rapidly begins to replicate and induce symptoms in wheat plants under optimal temperatures. This helps explain the pattern of infection and the development of symptoms under suboptimal field conditions through the fall and early spring.