Insight into the population dynamics of pathogenic bacteria causing grapevine crown gall in snowfall areas: snow cover protects the proliferation of pathogenic bacteria

Frontiers in Plant Science

Plant Science

Manabu Nemoto¹  Sunao Ochi²  Yosuke Matsushita²  Tomoyuki Sato³  Teruo Sone³  Akira Kawaguchi⁴ 

[1] Hokkaido Agricultural Research Center (HARC), National Agriculture and Food Research Organization (NARO), Sapporo, Japan;Institute of Plant Protection, National Agriculture and Food Research Organization (NIPP), Tsukuba, Japan;Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan;Western Region Agricultural Research Center (WARC) (Kinki, Chugoku and Shikoku Regions), National Agriculture and Food Research Organization (NARO), Fukuyama, Japan;

关键词: grapevine crown gall;    under the snow;    Hierarchical Bayesian Model;    Bayesian changepoint detection;    vineyards and plant-insect relationship;   

DOI  :  10.3389/fpls.2023.1198710

 received in 2023-04-03, accepted in 2023-05-16,  发布年份 2023

来源: Frontiers

【 摘 要 】

Grapevine crown gall (GCG) is a significant bacterial disease caused by tumorigenic Allorhizobium vitis (TAV) and is prevalent worldwide. TAV infects grapevines through wounds such as freezing injuries. Although grapevines typically avoid being wounded under snow cover, GCG occurs in many commercial vineyards in snowy regions. This study investigated the TAV population in GCG gall tissues, grapevine skins, and snow on grapevine skins from six infected vineyards located in Hokkaido, Japan, an area known for heavy snowfall. TAV was isolated not only from gall tissues but also from skins and snow on skins throughout the year. Hierarchical Bayesian model (HBM) analysis revealed that the number of TAV cells in gall tissues was affected by cultivar and low temperature, while those in skins were affected by location and low temperature. Additionally, Bayesian changepoint detection (BCD) showed that the number of TAV cells in gall and skin tissues increased during winter, including the snowfall season. Furthermore, the TAV population in grapevine skins under the snow was significantly higher than those above the snow, indicating that TAV under the snow is protected by the snow and can survive well during the snowfall season. This study highlights the ability of TAV to overwinter on/in galls and skins under the snow and act as inoculum for the next season.

【 授权许可】

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Copyright © 2023 Kawaguchi, Nemoto, Ochi, Matsushita, Sato and Sone