Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, Hangzhou, China.
Department of Horticulture, Zhejiang University, Hangzhou, China.
Pest Manag Sci. 2021 Oct;77(10):4313-4320. doi: 10.1002/ps.6460. Epub 2021 May 20.
While plant glucosinolates are known to impart resistance to many insects, their role in the interactions between plants and many phloem-feeding insects such as whiteflies are poorly understood. The whitefly Bemisia tabaci complex comprises many cryptic species that differ in the ability to utilize Brassica plants. However, whether Brassica plants-specific traits such as glucosinolates determine differences of whiteflies in colonizing Brassica plants remains in question.
We first observed performance of two whitefly species MEAM1 and Asia II 3, which differ obviously in their ability to colonize Brassica plants, on four cultivars of three Brassica species that vary in glucosinolate profile. We found that the life history characteristics of each of the two whitefly species seems to be only marginally affected by cultivar. We next used wild-type Arabidopsis plants and mutants defective in glucosinolate biosynthesis or hydrolysis to explore the effects of glucosinolates on the whitefly. We found that fecundity and development of immature stages of neither of the two whitefly species differ significantly between wild-type and mutants.
The data suggest that glucosinolates may have little effect on the oviposition by adults and the survival and development of immature stages of MEAM1 and Asia II 3 whiteflies. The marked differences in colonizing Brassica crops between the two whitefly species are likely due to plant traits other than glucosinolates. © 2021 Society of Chemical Industry.
尽管植物中的硫代葡萄糖苷已被证实能使许多昆虫产生抗药性，但人们对其在植物与许多吸食韧皮部汁液的昆虫（如粉虱）之间相互作用中的作用知之甚少。粉虱烟粉虱复合种包含许多在利用芸薹属植物方面能力不同的隐种。然而，是否芸薹属植物特有的性状，如硫代葡萄糖苷，决定了粉虱在定植芸薹属植物方面的差异，这仍然是个问题。
我们首先观察了两个在定植芸薹属植物方面能力明显不同的粉虱物种 MEAM1 和亚洲 II 3 在四个芸薹属三个物种的品种上的表现，这些品种在硫代葡萄糖苷图谱上存在差异。我们发现，这两个粉虱物种的生活史特征似乎只受到品种的轻微影响。接下来，我们使用野生型拟南芥植物和硫代葡萄糖苷生物合成或水解缺陷的突变体来探索硫代葡萄糖苷对粉虱的影响。我们发现，这两个粉虱物种的成虫产卵量和幼期的发育都没有明显差异。
这些数据表明，硫代葡萄糖苷可能对 MEAM1 和亚洲 II 3 粉虱成虫的产卵以及幼期的存活和发育几乎没有影响。这两个粉虱物种在定植芸薹属作物方面的显著差异可能是由于除硫代葡萄糖苷以外的植物性状所致。© 2021 化学工业协会。
