Effects of soil organisms on aboveground multitrophic interactions are consistent between plant genotypes mediating the interaction
Effects of soil organisms on aboveground multitrophic interactions are consistent between plant genotypes mediating the interaction
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DOI：
10.1111/j.1570-7458.2011.01123.x
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发表时间：
2011-06-01
影响因子：
1.9
通讯作者：
Biere, A.
中科院分区：
文献类型：
--
作者：
Kabouw, P.;Kos, M.;Biere, A.
地下群落可以影响植物和地上昆虫群落之间的相互作用。已知这种地下-地上相互作用取决于地下群落的组成以及介导这些相互作用的植物物种。然而，它在很大程度上是未知的，是否地下社区对地上植物-昆虫相互作用的影响也取决于介导相互作用的植物物种内的基因型变异。为了评估地下-地上互作的结果是否会受到植物基因型的影响，我们选择了两个白色甘蓝品种[甘蓝L.变种capitata（菊科）]。从以前的研究，它是已知的，这些品种在其化学和地下和地上的多营养相互作用不同。在地下，我们用线虫或微生物接种栽培品种的土壤，并包括灭菌土壤作为对照处理。在此基础上，对蚜虫[Brevicoryne brassicae（L.）（半翅目：蚜科）]种群发展和寄生蜂[Diaeretiella raismus（McIntosh）（膜翅目：茧蜂科）]适合度参数。保持最高蚜虫数量的品种也有最好的寄生性能。土壤处理影响蚜虫种群大小：微生物增加蚜虫种群增长。土壤处理不影响寄生蜂的性能。不同品种的氨基酸浓度，叶片相对生长速率，根，地上部和韧皮部硫代葡萄糖苷组成不同，但表现出类似的反应，这些性状的土壤处理。与此观察结果一致，没有发现品种和土壤处理蚜虫种群增长或寄生性能之间的相互作用。总体而言，地上群落受品种的影响更大，这是与硫代葡萄糖苷配置文件，比土壤群落。
Belowground communities can affect interactions between plants and aboveground insect communities. Such belowground-aboveground interactions are known to depend on the composition of belowground communities, as well as on the plant species that mediates these interactions. However, it is largely unknown whether the effect of belowground communities on aboveground plant-insect interactions also depends on genotypic variation within the plant species that mediates the interaction. To assess whether the outcome of belowground-aboveground interactions can be affected by plant genotype, we selected two white cabbage cultivars [Brassica oleracea L. var. capitata (Brassicaceae)]. From previous studies, it is known that these cultivars differ in their chemistry and belowground and aboveground multitrophic interactions. Belowground, we inoculated soils of the cultivars with either nematodes or microorganisms and included a sterilized soil as a control treatment. Aboveground, we quantified aphid [Brevicoryne brassicae (L.) (Hemiptera: Aphididae)] population development and parasitoid [Diaeretiella rapae (McIntosh) (Hymenoptera: Braconidae)] fitness parameters. The cultivar that sustained highest aphid numbers also had the best parasitoid performance. Soil treatment affected aphid population sizes: microorganisms increased aphid population growth. Soil treatments did not affect parasitoid performance. Cultivars differed in their amino acid concentration, leaf relative growth rate, and root, shoot, and phloem glucosinolate composition but showed similar responses of these traits to soil treatments. Consistent with this observation, no interactions were found between cultivar and soil treatment for aphid population growth or parasitoid performance. Overall, the aboveground community was more affected by cultivar, which was associated with glucosinolate profiles, than by soil community.