All over the world, from America to the Mediterranean Sea, the plant pathogen Xylella fastidiosa represents one of the most difficult challenges with many implications at ecological, agricultural, and economic levels. X. fastidiosa is a rod-shaped Gram-negative bacterium belonging to the family of Xanthomonadaceae. It grows at very low rates and infects a wide range of plants thanks to different vectors. Insects, through their stylets, suck a sap rich in nutrients and inject bacteria into xylem vessels. Since, until now, no antimicrobial treatment has been successfully applied to kill X. fastidiosa and/or prevent its diffusion, in this study, antimicrobial blue light (aBL) was explored as a potential anti-Xylella tool. Xylella fastidiosa subsp. pauca Salento-1, chosen as a model strain, showed a certain degree of sensitivity to light at 410 nm. The killing effect was light dose dependent and bacterial concentration dependent. These preliminary results support the potential of blue light in decontamination of agricultural equipment and/or plant surface; however, further investigations are needed for in vivo applications.

在世界各地，从美洲到地中海，植物病原体苛养木杆菌是最困难的挑战之一，对生态、农业和经济层面具有多种影响。X. fastidiosa是属于黄单胞菌科的杆状革兰氏阴性细菌。由于不同的载体，它的生长速度非常低并感染多种植物。昆虫通过其管心针吸取富含营养物质的汁液，并将细菌注入木质部血管中。由于迄今为止，还没有成功地应用抗菌治疗来杀死苛养木杆菌和/或防止其扩散，因此在本研究中，抗菌蓝光（aBL）被探索作为一种潜在的抗木聚糖工具。苛养木杆菌亚种pauca Salento-1被选为模型菌株，对410 nm的光表现出一定程度的敏感性。杀灭效果是光剂量依赖性和细菌浓度依赖性的。这些初步结果支持蓝光在农业设备和/或植物表面净化方面的潜力；然而，体内应用还需要进一步研究。