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Vector-mediated viral exchange between crops and weedy plants

文献类型： 外文期刊

作者： Shi, Xiao-bin 1 ; Zhang, Zhuo 1 ; Li, Fan 2 ; Preisser, Evan L. 3 ; Huang, Li-ping 1 ; Zhang, De-yong 1 ; Zhang, Zhan-hong 1 ; Zhang, Song-bai 1 ; Zhou, Xu-guo 4 ; Zhang, An-sheng 5 ; Liu, Hui 6 ; Wu, Yuan-hua 7 ; Cheng, Xiao-fei 8 ; He, Zi-fu 9 ; Liu, Yong 1 ;

作者机构： 1.Hunan Acad Agr Sci, Changsha 410125, Peoples R China

2.Yunnan Agr Univ, Kunming 650201, Peoples R China

3.Univ Rhode Isl, Dept Biol Sci, Kingston, RI 02881 USA

4.Univ Kentucky, Dept Entomol, Lexington, KY 40546 USA

5.Shandong Acad Agr Sci, Inst Plant Protect, Jinan 250100, Peoples R China

6.Natl Agr Technol Extens Ctr, Beijing 100026, Peoples R China

7.Shenyang Agr Univ, Acad Plant Protect, Shenyang 110866, Peoples R China

8.Northeast Agr Univ, Acad Agr, Haerbin 150038, Peoples R China

9.Guangdong Acad Agr Sci, Inst Plant Protect, Guangzhou 510640, Peoples R China

关键词： Weeds; Alternative host; Bemisia tabaci; Tomato chlorosis virus; Transmission

期刊名称：JOURNAL OF PEST SCIENCE （ 影响因子：4.8； 五年影响因子：5.0 ）

ISSN： 1612-4758

年卷期： 2023 年

页码：

收录情况： SCI

摘要： While virus-vector-crop interactions have received considerable attention, free-living plants growing in cultivated areas ('weeds') can also serve as viral reservoirs. Although weed-to-crop transmission is well documented, less is known about crop-to-weed transmission and how the interplay between the two plant groups affects disease dynamics. We explored reciprocal viral transmission of Tomato chlorosis virus (ToCV) between tomatoes and ToCV-susceptible weeds by Bemisia tabaci MED. A field survey assessed Bemisia density and ToCV titer in virus-susceptible weeds; a parallel experiment demonstrated that their removal reduced ToCV infection in tomatoes. Weeds growing far from greenhouses had lower rates of ToCV infection than greenhouse-adjacent ones, suggesting reciprocal crop-weed viral exchange. While Bemisia preferred tomato over weeds, vector density and viral infection of near-greenhouse populations of the dominant weed Amaranthus retroflexus increased following tomato harvest. ToCV infection altered volatile production in A. retroflexus; the Bemisia-attractant compound neophytadiene increased 26-fold in infected plants. Because temperatures increase over the growing season, we also explored the relationship between temperature, neophytadiene levels, and whitefly preference: plants grown at higher temperatures produced more neophytadiene and were preferred by whiteflies. We also assessed volatile production and jasmonic acid levels in control A. retroflexus versus those previously fed upon by either virus-free or viruliferous Bemisia. The largest shifts occurred in plants fed upon by viruliferous whiteflies, demonstrating that ToCV rather than Bemisia feeding explained the observed changes. Our results suggest that post-harvest viral transfer from crops to weeds may play an important role in driving disease outbreaks the following season and identify some simple but effective ways of reducing transmission into weedy plant species.

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