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Modification of non-vector aphid feeding behavior on virus-infected host plant.

Hu Z, Zhao H, Thieme T - J. Insect Sci. (2013)

Bottom Line: Electrical penetration graph recordings were performed.However, the electrical penetration graph parameters described above showed no significant differences in aphid feeding behavior on virus-free and vector pre-infested plants and the control barley plants during S. avenae feeding.Based on these results, the reasons and trends among the virus-infected host plants' effects on the feeding behavior of non-vector aphids are discussed.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Crop Stress Biology in Arid Areas, college of plant protection, Northwest A&F University, Yangling, 712100 Shaanxi, China.

ABSTRACT
Virus-infected host plants can have positive, neutral or negative effects on vector aphids. Even though the proportion of non-vector aphids associated with a plant far exceeds that of vector species, little is known about the effect of virus-infected plants on non-vector aphids. In the present study, the English grain aphid Sitobion avenae (Fabricius) (Hemiptera: Aphididae), a non-vector of Wheat dwarf virus (WDV) and Cereal yellow dwarf virus-RPV (CYDV-RPV), was monitored on, virus-infected, virus-free and leafhopper/aphid-infested, and virus- and insect-free (control) barley, Hordeum vulgare L. (Poales: Poaceae), plants. Electrical penetration graph recordings were performed. Compared with the control plants, S. avenae on infected plants exhibited reduced non-probing and pathway phase, and increased phloem sap ingestion phase, and more aphids reached sustained phloem ingestion. However, the electrical penetration graph parameters described above showed no significant differences in aphid feeding behavior on virus-free and vector pre-infested plants and the control barley plants during S. avenae feeding. The results suggest that WDV/CYDV-RPV-infected host plants positively affected the feeding behavior of the non-vector aphid S. avenae. Based on these results, the reasons and trends among the virus-infected host plants' effects on the feeding behavior of non-vector aphids are discussed.

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Percentage of different phases in relation to the complete probing of Sitobion avenae fed on different barley treatments during the 8 hr electrical penetration graph experiment. A) Control; B) P. alienus pre-infested; C) R. padi pre-infested; D) WDV-infected; E) CYDV-RPV-infected. Control: barley infected neither with virus nor vector; WDV: Wheat dwarf virus; CYDV-RPV: Cereal yellow dwarf virus-RPV. High quality figures are available online.
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f01_01: Percentage of different phases in relation to the complete probing of Sitobion avenae fed on different barley treatments during the 8 hr electrical penetration graph experiment. A) Control; B) P. alienus pre-infested; C) R. padi pre-infested; D) WDV-infected; E) CYDV-RPV-infected. Control: barley infected neither with virus nor vector; WDV: Wheat dwarf virus; CYDV-RPV: Cereal yellow dwarf virus-RPV. High quality figures are available online.

Mentions: The percentage of different phases in relation to the complete probing of S. avenae on different barley treatments is shown in Figure 1. After 3 hr of monitoring, the proportion of S.avenae that reached phloem phase was 20.2% on WDV-infected plants and 23.5% on CYDV-RPV-infected plants, both of which were higher than on control plants (8.3%) (WDV-infected: χ2 = 5.025, p = 0.025; CYDV-RPV-infected: χ2 = 7.482, p = 0.004). At 4 hr of monitoring, the proportion was 24.6% and 26.4% on WDV/CYDV-RPV-infected plants respectively, both of which were higher than on control plants (11.6%) (WDV-infected: χ2 = 4.775, p = 0.029; CYDV-RPV-infected: χ2 = 5.491, p = 0.019). Furthermore, after 7 hr of monitoring, a higher percentage of aphids showed sustained phloem ingestion phase on the WDV/CYDV-RPV-infected plants (WDV-infected: χ2 = 4.007, p = 0.047; CYDV-RPV-infected: χ2 = 5.822, p = 0.016) (Figure 2). However, in the whole course of this experiment, the proportion of aphids reaching phloem and sustained ingestion phases were similar on vector pre-infested and control plants (Figure 1, 2).


Modification of non-vector aphid feeding behavior on virus-infected host plant.

Hu Z, Zhao H, Thieme T - J. Insect Sci. (2013)

Percentage of different phases in relation to the complete probing of Sitobion avenae fed on different barley treatments during the 8 hr electrical penetration graph experiment. A) Control; B) P. alienus pre-infested; C) R. padi pre-infested; D) WDV-infected; E) CYDV-RPV-infected. Control: barley infected neither with virus nor vector; WDV: Wheat dwarf virus; CYDV-RPV: Cereal yellow dwarf virus-RPV. High quality figures are available online.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3735108&req=5

f01_01: Percentage of different phases in relation to the complete probing of Sitobion avenae fed on different barley treatments during the 8 hr electrical penetration graph experiment. A) Control; B) P. alienus pre-infested; C) R. padi pre-infested; D) WDV-infected; E) CYDV-RPV-infected. Control: barley infected neither with virus nor vector; WDV: Wheat dwarf virus; CYDV-RPV: Cereal yellow dwarf virus-RPV. High quality figures are available online.
Mentions: The percentage of different phases in relation to the complete probing of S. avenae on different barley treatments is shown in Figure 1. After 3 hr of monitoring, the proportion of S.avenae that reached phloem phase was 20.2% on WDV-infected plants and 23.5% on CYDV-RPV-infected plants, both of which were higher than on control plants (8.3%) (WDV-infected: χ2 = 5.025, p = 0.025; CYDV-RPV-infected: χ2 = 7.482, p = 0.004). At 4 hr of monitoring, the proportion was 24.6% and 26.4% on WDV/CYDV-RPV-infected plants respectively, both of which were higher than on control plants (11.6%) (WDV-infected: χ2 = 4.775, p = 0.029; CYDV-RPV-infected: χ2 = 5.491, p = 0.019). Furthermore, after 7 hr of monitoring, a higher percentage of aphids showed sustained phloem ingestion phase on the WDV/CYDV-RPV-infected plants (WDV-infected: χ2 = 4.007, p = 0.047; CYDV-RPV-infected: χ2 = 5.822, p = 0.016) (Figure 2). However, in the whole course of this experiment, the proportion of aphids reaching phloem and sustained ingestion phases were similar on vector pre-infested and control plants (Figure 1, 2).

Bottom Line: Electrical penetration graph recordings were performed.However, the electrical penetration graph parameters described above showed no significant differences in aphid feeding behavior on virus-free and vector pre-infested plants and the control barley plants during S. avenae feeding.Based on these results, the reasons and trends among the virus-infected host plants' effects on the feeding behavior of non-vector aphids are discussed.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Crop Stress Biology in Arid Areas, college of plant protection, Northwest A&F University, Yangling, 712100 Shaanxi, China.

ABSTRACT
Virus-infected host plants can have positive, neutral or negative effects on vector aphids. Even though the proportion of non-vector aphids associated with a plant far exceeds that of vector species, little is known about the effect of virus-infected plants on non-vector aphids. In the present study, the English grain aphid Sitobion avenae (Fabricius) (Hemiptera: Aphididae), a non-vector of Wheat dwarf virus (WDV) and Cereal yellow dwarf virus-RPV (CYDV-RPV), was monitored on, virus-infected, virus-free and leafhopper/aphid-infested, and virus- and insect-free (control) barley, Hordeum vulgare L. (Poales: Poaceae), plants. Electrical penetration graph recordings were performed. Compared with the control plants, S. avenae on infected plants exhibited reduced non-probing and pathway phase, and increased phloem sap ingestion phase, and more aphids reached sustained phloem ingestion. However, the electrical penetration graph parameters described above showed no significant differences in aphid feeding behavior on virus-free and vector pre-infested plants and the control barley plants during S. avenae feeding. The results suggest that WDV/CYDV-RPV-infected host plants positively affected the feeding behavior of the non-vector aphid S. avenae. Based on these results, the reasons and trends among the virus-infected host plants' effects on the feeding behavior of non-vector aphids are discussed.

Show MeSH
Related in: MedlinePlus