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Interactions among cereal cyst nematode Heterodera filipjevi, dryland crown rot Fusarium culmorum, and drought on grain yield components and disease severity in bread wheat

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Title Interactions among cereal cyst nematode Heterodera filipjevi, dryland crown rot Fusarium culmorum, and drought on grain yield components and disease severity in bread wheat
 
Creator Ahmadi, Mahin
Mirakhorli, Neda
Erginbas-Orakci, Gul
Ansari, Omid
Braun, Hans-Joachim
Paulitz, Timothy C.
Dababat, Abdelfattah A.
 
Subject fusarium
heterodera
drought stress
wheat
 
Description The cereal cyst nematode (CCN) Heterodera and crown rot caused by Fusarium species limit cereal production and yield potential. Losses increase when CCN and crown rot occur together, especially under water stress conditions. The objective of this study was to investigate the interactions among Heterodera filipjevi, Fusarium culmorum, and drought on a set of wheat germplasm with differing levels of resistance/tolerance to CCN, crown rot and drought. Plant emergence was significantly reduced (56% seedling death) when seeds were planted in a water stress environment where F. culmorum and H. filipjevi were present. Crown rot was more severe under water stress compared with Fusarium inoculation alone. The number of cysts fell significantly when H. filipjevi was co-inoculated with F. culmorum, revealing an antagonistic interaction between the nematode and fungus. The highest number of cysts was found on the susceptible accession ‘Seri’ under water stress conditions. Water stress caused a significant reduction in plant height, while F. culmorum inoculation did not, unless combined with water stress. Yield components were significantly reduced by each of the single stresses and losses were greater when plants were exposed to double or triple stresses. Water stress and F. culmorum inoculation caused a significant reduction in spike weight and seeds per spike. The chlorophyll content of wheat leaves was negatively affected by water stress and inoculation by both nematode and fungus. In conclusion, water stress exacerbates the damage caused by CCN and crown rot, and planting drought-resistant varieties would be an ideal solution to reduce losses.
 
Date 2022-05-04
2023-02-28T08:59:57Z
2023-02-28T08:59:57Z
 
Type Journal Article
 
Identifier Ahmadi, M., Mirakhorli, N., Erginbas-Orakci, G., Ansari, O., Braun, H.-J., Paulitz, T. and Dababat, A.A. 2022. Interactions among cereal cyst nematode Heterodera filipjevi , dryland crown rot Fusarium culmorum, and drought on grain yield components and disease severity in bread wheat. Canadian Journal of Plant Pathology 44(3):415–431.
1715-2992
https://hdl.handle.net/10568/129092
https://doi.org/10.1080/07060661.2021.2013947
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Format p. 415-431
 
Publisher Informa UK Limited
 
Source Canadian Journal of Plant Pathology