Barley yellow dwarf virus, wheat, and Sitobion avenae:: a case of trilateral interactions
Barley yellow dwarf virus, wheat, and Sitobion avenae:: a case of trilateral interactions
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DOI：
10.1111/j.0013-8703.2004.00115.x
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发表时间：
2004-01-01
影响因子：
1.9
通讯作者：
Borgemeister, C
中科院分区：
文献类型：
--
作者：
Fiebig, M;Poehling, HM;Borgemeister, C
我们分析了两种大麦黄矮病毒（BYDV）毒株（MAV和PAV）与小麦(cv。特别是是否被病毒感染可能会改变寄主植物的适宜性，从而有利于病媒的发展。通过对小麦病株和非病株韧皮部汁液中氨基酸和糖含量的测定，我们发现病株的氨基酸总量浓度显著降低。蜜汁的定性和定量分析以及蜜汁的排泄表明，绿脉霉对侵染植株韧皮部汁液的利用效率较低。此外，avenae在感染植株上分泌的蜜露也较少。两种BYDV菌株通过降低内在自然增长率显著影响蚜虫的发育。因此，就蚜虫种群生长潜力而言，受病毒感染降低了寄主对bydv感染植物的适宜性。然而，在病毒感染的植物上产生了更多的alate变种。这些发现与S. avenae的种群动态以及BYDV的传播有关。
We analysed interactions in the system of two Barley Yellow Dwarf Virus (BYDV) strains (MAV and PAV), and wheat (cv. Tinos) as host plant for the virus, and the cereal aphid Sitobion avenae (F.) as vector, in particular whether or not infection by the virus might alter host plant suitability in favour of vector development. By measuring the amino acid and sugar content in the phloem sap of infected and non-infected wheat plants we found a significant reduction in the concentration of the total amount of amino acids on BYDV-infected plants. Qualitative and quantitative analysis of honeydew and honeydew excretion indicated a lower efficiency of phloem sap utilisation by S. avenae on infected plants. In addition, S. avenae excreted less honeydew on infected plants. Both BYDV strains significantly affected aphid development by a reduction in the intrinsic rate of natural increase. Hence, infection by the virus reduced the host suitability in terms of aphid population growth potential on BYDV-infected plants. However, more alate morphs developed on virus-infected plants. These findings are discussed in relation to the population dynamics of S. avenae, and, as a consequence, the spread of BYDV.