Instituto de Ciencias Agrarias (ICA, CSIC), Consejo Superior de Investigaciones Científicas (CSIC), C/Serrano 115 Dpdo 28006 Madrid, Spain.
Sci Rep. 2017 Apr 3;7:45534. doi: 10.1038/srep45534.
Candidatus Liberibacter solanacearum (Lso) is bacterium transmitted by psyllids to Solanaceae and Apiaceae plants. So far, Lso is found in Europe affecting Apiaceae. In the Mediterranean region, Bactericera trigonica is the only known vector of Lso, but the leek-onion psyllid Bactericera tremblayi is another widespread psyllid and potential vector of Lso. Commonly, carrot, leek and potato are cultivated in the same zones and it is uncertain if these psyllid species are able to transmit Lso to potato plants. Here, we assessed the transmission of Lso by B. trigonica and B. tremblayi to potato plants. B. trigonica showed preference to ingest from the phloem, settle and oviposit on carrot and celery but not on potato. This was correlated with high Lso transmission rates to both carrot (80%) and celery (70%) but very low to potato (≤3%). B. tremblayi preferred leek over carrot and potato, the latter being the less preferred host. B. tremblayi readily ingested from the phloem of infected carrots but failed to transmit Lso from carrot to carrot. Our study shows that the risk of Lso transmission from Apiaceae to potato by B. trigonica is very low, and that B. tremblayi is not a likely vector of Lso.
甘蓝蚜枝原体（Lso）是一种由蚜虫传播给茄科和伞形科植物的细菌。到目前为止，Lso 仅在欧洲被发现，影响伞形科植物。在地中海地区，Bactericera trigonica 是唯一已知的 Lso 传播媒介，但葱蓟马 Bactericera tremblayi 是另一种广泛分布的蚜虫，也是 Lso 的潜在传播媒介。通常，胡萝卜、韭菜和土豆在同一地区种植，尚不确定这些蚜虫物种是否能够将 Lso 传播给土豆植株。在这里，我们评估了 B. trigonica 和 B. tremblayi 对土豆植株传播 Lso 的能力。B. trigonica 更喜欢从韧皮部取食，在胡萝卜和芹菜上定居和产卵，但不在土豆上。这与高 Lso 向胡萝卜（80%）和芹菜（70%）的传播率有关，但向土豆的传播率非常低（≤3%）。B. tremblayi 更喜欢韭菜而不是胡萝卜和土豆，土豆是最不受欢迎的宿主。B. tremblayi 很容易从感染的胡萝卜韧皮部取食，但未能将 Lso 从胡萝卜传播到胡萝卜。我们的研究表明，B. trigonica 从伞形科植物向土豆传播 Lso 的风险非常低，B. tremblayi 不太可能是 Lso 的传播媒介。
