在修剪患有角斑叶病的草莓繁殖植株的叶片时空中散播黄单胞菌 fragariae

IF 1.7 3区 农林科学 Q2 AGRONOMY European Journal of Plant Pathology Pub Date : 2024-09-18 DOI:10.1007/s10658-024-02950-w
P. Kastelein, A. Evenhuis, M. C. Krijger, J. M. van der Wolf
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引用次数: 0

摘要

草莓角斑叶病(ALS)的病原菌是黄单胞菌(Xanthomonas fragariae),它是欧洲(EPPO A2)植物繁殖材料非检疫性有害生物。我们进行了田间试验,以探索在修剪患有角斑叶斑病的草莓干叶或湿叶时,X. fragariae 是否会通过空气传播。修剪叶片会导致叶片碎片散布到附近的环境中。研究发现,在草莓植株下风向的前 5 米距离内,叶片碎片的数量急剧下降。此外,空气质量监测仪显示,在修剪过程中,0.5 - 10 μm 大小的颗粒被喷射到空气中,导致距离地面 45 厘米的短时间内颗粒密度增加,在下风向至少 50 米处可以检测到。在这一高度,通过空气采样器,在距离 ALS 病株 25 米的下风处检测到了 X. fragariae。结果发现,在距离病源植物最初 10 米的范围内,X. fragariae 菌落形成单位(cfu)的密度急剧下降。X. fragariae cfu 的密度与颗粒密度密切相关。结果表明,在对患有 ALS 病株的草莓繁殖作物修剪叶片时,空气中的 X. fragariae 接种体很有可能会沉积在附近的苗床上。本文讨论了这种空气传播的接种体是否会导致感染。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Aerial dispersion of Xanthomonas fragariae during trimming leaves of angular leaf spot diseased strawberry propagation plants

The bacterium Xanthomonas fragariae is the causative agent of angular leaf spot (ALS) of strawberry, a Regulated Non-Quarantine Pest in Europe (EPPO A2) for plant propagation material. Field experiments were conducted to explore if X. fragariae is dispersed through the air during trimming ALS-diseased strawberry plants with dry or wetted leaves. Trimming the leaves led to dissemination of leaf fragments to the nearby surroundings. A sharp decrease in the amount of leaf fragments within the first 5 m distance downwind from the strawberry plants was found. Furthermore, air quality monitors demonstrated that during trimming 0.5 – 10 μm sized particles were ejected into the air, resulting in short periods with increased particle densities 45 cm above ground level, which could be detected at least 50 m downwind. At this height X. fragariae was detected by means of air samplers, as evidenced with a combination of dilution-plating and TaqMan assays, at 25 m distance downwind from ALS-diseased plants. A sharp decrease in the density of X. fragariae colony forming units (cfu) within the first 10 m distance from the source plants was found. The densities of X. fragariae cfu were strongly associated with the particle densities. Results indicate that during trimming leaves of strawberry propagation crops with ALS-diseased plants there is a considerable risk of deposition of airborne X. fragariae inoculum on nearby nursery beds. Whether this airborne inoculum can result in infections is discussed.

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来源期刊
European Journal of Plant Pathology
European Journal of Plant Pathology 农林科学-农艺学
CiteScore
4.20
自引率
5.60%
发文量
183
审稿时长
3 months
期刊介绍: The European Journal of Plant Pathology is an international journal publishing original articles in English dealing with fundamental and applied aspects of plant pathology; considering disease in agricultural and horticultural crops, forestry, and in natural plant populations. The types of articles published are :Original Research at the molecular, physiological, whole-plant and population levels; Mini-reviews on topics which are timely and of global rather than national or regional significance; Short Communications for important research findings that can be presented in an abbreviated format; and Letters-to-the-Editor, where these raise issues related to articles previously published in the journal. Submissions relating to disease vector biology and integrated crop protection are welcome. However, routine screenings of plant protection products, varietal trials for disease resistance, and biological control agents are not published in the journal unless framed in the context of strategic approaches to disease management.
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