Impact of the “Flavescence dorée” phytoplasma on xylem growth and phloem anomalies in trunks of ‘Chardonnay’ grapevines (Vitis vinifera)

Dataset collected from dendroecological study on trunks of grapevines ('Chardonnay' cv.) infected by the "Flavescence dorée" phytoplasma (FDp) in Origlio (southern Switzerland) in 2019-2020. Ring widths were measured with cellSens (Olympus Corporation). Calculations and analysis were conducted within R.
The Flavescence dorée phytoplasma (FDp) causes a severe grapevine (Vitis vinifera) disease. Anatomical modification due to FDp infections are known to occur but research so far focused on stems and leaf tissues and, in particular, on their phloem structure. In this paper, we applied dendrochronological techniques on wood rings and analysed the anatomical structures of the trunk of the susceptible grapevine cultivar ‘Chardonnay’ in order to verify their response to FDp infections.
In this study, we tested the impact of FDp and drought stress on xylem ring width and also described phloem anomalies inside the trunk of grapevines. We concluded that drought and FDp infection both have a significant effect on ring width reductions and that FDp supersedes the effect of drought conditions (calculated after the SPEI index) in infected specimens.

本数据集采集自2019至2020年瑞士南部奥里利戈（Origlio）地区感染"Flavescence dorée"植原体（Flavescence dorée phytoplasma, FDp）的霞多丽（'Chardonnay' cv.）葡萄树干的树木生态学研究。年轮宽度通过奥林巴斯（Olympus Corporation）的cellSens软件测量，所有计算与分析均在R环境中完成。
金黄化病植原体（FDp）可引发严重的葡萄（Vitis vinifera）病害。现有研究已证实FDp感染会导致植株解剖结构发生改变，但此前的相关研究多聚焦于茎秆与叶片组织，尤其是其韧皮部结构。本研究采用树木年代学技术对木质部年轮展开分析，并探究易感品种‘霞多丽’葡萄树干的解剖结构，以验证植株对FDp感染的响应情况。
本研究评估了FDp感染与干旱胁迫对木质部年轮宽度的影响，并描述了葡萄树干内部的韧皮部异常特征。研究结果表明，干旱与FDp感染均会显著降低年轮宽度，且在感染植株中，FDp的影响会超过基于标准化降水蒸散指数（SPEI）计算得到的干旱胁迫效应。