Data_Sheet_6_Enhanced Age-Related Resistance to Tomato Yellow Leaf Curl Virus in Tomato Is Associated With Higher Basal Resistance.XLSX

Tomato yellow leaf curl virus (TYLCV) is one of the most notorious plant pathogens affecting the production of tomato worldwide. While the occurrence of age-related resistance (ARR) against TYLCV has been reported, the factors impacting its development remain unknown. We conducted a series of experiments with three tomato cultivars that vary in basal resistance to TYLCV to explore factors involved in the development of ARR. Our data indicate that ARR is more pronounced in tomato cultivars with higher basal resistance. Additionally, increased plant biomass in older plants does not contribute to ARR. Virus source plants with a younger age at initial inoculation facilitates virus acquisition by whiteflies. Finally, an analysis on plant hormones suggests that salicylic acid (SA) may play a major role in the development of ARR in tomato against TYLCV. These findings provide new insights into the developmental resistance in tomato against TYLCV as well as clues for the deployment of ARR in the management of diseases caused by TYLCV.

番茄黄化曲叶病毒（Tomato yellow leaf curl virus，TYLCV）是全球范围内危害番茄生产的最具破坏性的植物病原物之一。尽管已有研究报道番茄对TYLCV存在年龄相关抗性（age-related resistance，ARR）现象，但其形成的调控因子仍未明确。本研究选取3份对TYLCV基础抗性存在差异的番茄栽培品种，开展了一系列实验以探究ARR形成的相关调控因子。实验结果表明，基础抗性越强的番茄栽培品种，其ARR的表现越显著。此外，成熟植株生物量的提升并未促进ARR的形成。初始接种时病毒源植株的株龄越小，烟粉虱越易获取其中的病毒。最后，植物激素分析结果显示，水杨酸（salicylic acid，SA）可能在番茄抗TYLCV的ARR形成过程中发挥关键作用。本研究结果不仅为解析番茄抗TYLCV的发育抗性机制提供了新的见解，也为利用ARR防控TYLCV引发的植物病害提供了理论线索。