Host Plant Affects Symbiont Abundance inBemisia tabaci(Hemiptera: Aleyrodidae)
Host Plant Affects Symbiont Abundance inBemisia tabaci(Hemiptera: Aleyrodidae)
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DOI：
10.3390/insects11080501
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发表时间：
2020-08-01
期刊：
影响因子：
3
通讯作者：
Liu, Tong-Xian
中科院分区：
文献类型：
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作者：
Liu, Yan-Hong;Shah, M. Mostafizur Rahman;Liu, Tong-Xian
共生体的营养贡献有助于植食性昆虫对植物的利用，促进昆虫对寄主植物的感染和传播。本研究从营养方面探讨了寄主植物对烟粉虱中东-小亚细亚1号（MEAM 1）共生菌的影响。我们发现，三个寄主植物适应粉虱种群窝藏相同的共生类群在不同的数量。在粉虱种群中，甚至在那些转移到不同寄主植物物种以满足粉虱营养需求的种群中，初级共生体Portieradecreased的量随着寄主植物必需氨基酸比例的增加而增加。然而，次级共生体的丰度在粉虱寄主植物转移一个世代后，寄主植物的必需氨基酸水平的相关性不大。说明寄主植物氮素营养主要是必需氨基酸，影响共生体的丰度，特别是Portiera，以满足粉虱的营养需求，粉虱通过寄主植物调控共生体的数量。多伙伴共生系统中的养分交换为害虫防治提供了新的思路。共生体提供养分，使昆虫以植物为食。烟粉虱中东-小亚细亚1（MEAM 1）是一种多食性害虫，依赖共生体提供饮食中缺乏的关键营养素。在这里，我们建立了三个烟粉虱种群茄子，黄瓜和番茄，并观察到，他们窝藏相同的共生类群在不同的数量。初级共生体Portiera的数量随着宿主植物必需氨基酸（EAAs）浓度的增加而减少。转移到不同植物物种的粉虱种群在前三代或四代表现出Portiera量的波动;当粉虱种群转移到具有较低EAAs比例的植物物种时，Portiera量增加。在次级共生体中，茄子烟粉虱种群比其他两个种群具有更低的Hamiltonella数量和更高的Rickettsia数量。烟粉虱迁移寄主植物后，两种共生体的丰度变化与寄主植物的比例关系不大。这些结果表明，寄主植物的氮营养，主要是在EAA的形式，影响共生体的丰度，特别是Portiera，以满足粉虱的营养需求。研究结果将为通过操纵昆虫共生体协会中的共生体来控制害虫的努力提供信息。
Simple Summary The nutritional contributions of symbionts facilitate herbivores' plant utilization, promoting insects infecting and spreading on host plants. In this study we investigated the effects of host plants on the symbionts ofBemisia tabaciMiddle East-Asia Minor 1 (MEAM1) from a nutritional aspect. We found that three host plant-adapted whitefly populations harbored the same symbiont taxa in different quantities. The amount of the primary symbiontPortieradecreased with increasing host-plant essential amino acid proportions in whitefly populations and even in those transferred to different host-plant species to meet the nutritional demands of whiteflies. However, the abundance of the secondary symbionts in whiteflies after host-plant-shifting for one generation showed little correlation with essential amino acid levels of host plants. It demonstrates that host-plant nitrogen nutrition-mainly, essential amino acids-influences the abundance of symbionts, especiallyPortiera, to meet whiteflies' nutritional demands, and whiteflies manipulate their symbionts' quantity governed by the host plant. The nutrient exchanges in symbioses involving multiple partners could provide new ideas for pest control. Symbionts contribute nutrients that allow insects to feed on plants. The whiteflyBemisia tabaciMiddle East-Asia Minor 1 (MEAM1) is a polyphagous pest that depends on symbionts to provide key nutrients that are deficient in the diet. Here, we established three whitefly populations on eggplants, cucumbers, and tomatoes and observed that they harbored the same symbiont taxa in different quantities. The amount of the primary symbiont,Portiera, decreased with increasing concentrations of host-plant essential amino acids (EAAs). Whitefly populations transferred to different plant species exhibited fluctuations inPortieraamounts in the first three or four generations; the amount ofPortieraincreased when whitefly populations were transferred to plant species with lower EAAs proportions. As for the secondary symbionts, the whitefly population of eggplants exhibited lower quantities ofHamiltonellaand higher quantities ofRickettsiathan the other two populations. The changes of both symbionts' abundance in whitefly populations after host-plant-shifting for one generation showed little correlation with the EAAs' proportions of host plants. These findings suggest that host-plant nitrogen nutrition, mainly in the form of EAAs, influences the abundance of symbionts, especiallyPortiera, to meet the nutritional demands of whiteflies. The results will inform efforts to control pests through manipulating symbionts in insect-symbiont associations.