Tripartite interactions of Barley yellow dwarf virus, Sitobion avenae and wheat varieties

Xiao-Feng Liu; Xiang-Shun Hu; Mike A Keller; Hui-Yan Zhao; Yun-Feng Wu; Tong-Xian Liu

doi:10.1371/journal.pone.0106639

Tripartite interactions of Barley yellow dwarf virus, Sitobion avenae and wheat varieties

PLoS One. 2014 Sep 3;9(9):e106639. doi: 10.1371/journal.pone.0106639. eCollection 2014.

Authors

Xiao-Feng Liu¹, Xiang-Shun Hu¹, Mike A Keller², Hui-Yan Zhao¹, Yun-Feng Wu¹, Tong-Xian Liu¹

Affiliations

¹ State Key Laboratory for Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, Shaanxi, China; Key Laboratory of Crop Pest Management on the Northwest Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, China.
² Key Laboratory of Crop Pest Management on the Northwest Loess Plateau, Ministry of Agriculture, Northwest A&F University, Yangling, Shaanxi, China; School of Agriculture, Food and Wine, Waite Campus, the University of Adelaide, Adelaide, Australia.

Abstract

The tripartite interactions in a pathosystem involving wheat (Triticum aestivum L.), the Barley yellow dwarf virus (BYDV), and the BYDV vector aphid Sitobion avenae were studied under field conditions to determine the impact of these interactions on aphid populations, virus pathology and grain yield. Wheat varietal resistance to BYDV and aphids varied among the three wheat varieties studied over two consecutive years. The results demonstrated that (1) aphid peak number (APN) in the aphid + BYDV (viruliferous aphid) treatment was greater and occurred earlier than that in the non-viruliferous aphid treatment. The APN and the area under the curve of population dynamics (AUC) on a S. avenae-resistant variety 98-10-30 was significantly lower than on two aphid-susceptible varieties Tam200(13)G and Xiaoyan6. (2) The production of alatae (PA) was greater on the variety 98-10-30 than on the other varieties, and PA was greater in the aphid + BYDV treatment on 98-10-30 than in the non-viruliferous aphid treatment, but this trend was reversed on Tam200(13)G and Xiaoyan6. (3) The BYDV disease incidence (DIC) on the variety 98-10-30 was greater than that on the other two varieties in 2012, and the disease index (DID) on Tam200(13)G was lower than on the other varieties in the aphid + BYDV and BYDV treatments in 2012, but not in 2011 when aphid vector numbers were generally lower. (4) Yield loss in the aphid + BYDV treatment tended to be greater than that in the aphid or BYDV alone treatments across varieties and years. We suggested that aphid population development and BYDV transmission tend to promote each other under field conditions. The aphids + BYDV treatment caused greater yield reductions than non-viruliferous aphids or virus treatment. Wheat varietal resistance in 98-10-30 affects the aphid dispersal, virus transmission and wheat yield loss though inhibits aphid populations from increasing.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Aphids / virology*
Host-Pathogen Interactions / physiology*
Luteovirus / physiology*
Plant Diseases* / parasitology
Plant Diseases* / virology
Triticum* / parasitology
Triticum* / virology

Grants and funding

This study was financially supported by The Youth Foundation (080807, 08080252), the Basic Research Foundation of Northwest A&F University (Z111020915, Z109021122), the National Department Public Benefit Research Foundation of China (grant no. nyhyzx201303021), and the 111 Project from the Education Ministry of China (grant no. B07049). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.