中文摘要：介体-病毒-植物间的交互作用具有重要的生态学和进化学意义。虽然三种之间的交互作用已经获得了些许关注，但对介体侵染是否会影响病毒的传播和侵染还知之甚少。通过对烟粉虱、菜豆金黄花叶病毒和烟草/番茄的研究发现，之前粉虱介体对植株的侵染减少了之后植株对病毒传播的敏感性。研究结果表明，介体和非介体昆虫对植物的取食可能会对随后病毒的传播和侵染产生很大的负面影响。
外文摘要：The interactions of vector-virus-plant have important ecological and evolutionary implications. While the tripartite interactions have received some attention, little is known about whether vector infestation affects subsequent viral transmission and infection. Working with the whitefly Bemisia tabaci, begomovirus and tobacco/tomato, we demonstrate that pre-infestation of plants by the whitefly vector reduced subsequent plant susceptibility to viral transmission. Pre-infestation by the cotton bollworm, a nonvector of the virus, likewise repressed subsequent viral transmission. The two types of insects, with piercing and chewing mouthparts, respectively, activated different plant signaling pathways in the interactions. Whitefly pre-infestation activated the salicylic acid (SA) signaling pathway, leading to deposition of callose that inhibited begomovirus replication/movement. Although cotton bollworm infestation elicited the jasmonic acid (JA) defense pathway and was beneficial to virus replication, the pre-infested plants repelled whiteflies from feeding and so decreased virus transmission. Experiments using a pharmaceutical approach with plant hormones or a genetic approach using hormone transgenic or mutant plants further showed that SA played a negative but JA played a positive role in begomovirus infection. These novel findings indicate that both vector and nonvector insect feeding of a plant may have substantial negative consequences for ensuing viral transmission and infection.
外文关键词：Begomovirus, Bemisia tabaci, induced plant defense, induced plant susceptibility, insect pre-infestation, insect–microbe–plant interaction, virus transmission, whitefly
作者：Ping Li, Yan-Ni Shu, Shuai Fu, 等
作者单位：浙江大学
期刊名称：New Phytologist
期刊影响因子：7.33
出版年份：2017
出版刊次：4
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