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首页> 外文期刊>Plant Pathology >Survival of Curtobacterium flaccumfaciens pv. flaccumfaciens in weeds
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Survival of Curtobacterium flaccumfaciens pv. flaccumfaciens in weeds

机译：凝胶杆菌的存活率Flaccumfaciens PV。 杂草的Flaccumfaciens

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摘要

Weeds are important alternative hosts of pathogens, responsible for the survival and spread of phytopathogenic bacteria. Our study evaluated the potential of weeds as hosts of Curtobacterium flaccumfaciens pv. flaccumfaciens (Cff), causal agent of bacterial wilt, one of the main diseases of common beans. Cff survival was evaluated in the phyllosphere and in the rhizosphere of 21 weeds, in four experiments under field conditions, during the years 2018 and 2019. The aerial part of the plant was inoculated by spraying bacterial suspension (10(7) cfu/ml) of Cff, while the soil of the growing pots was infested with the same suspension. Cff survival was evaluated every 7 days, for 70 days. The identity of the bacterium was confirmed by PCR with the specific primers CffFOR2 and CffREV4, from strains recovered from all samples. Principal component analysis (PCA) showed that high temperatures and rainfall reduced Cff survival in the phyllosphere, while high temperatures reduced the survival of the bacterium in the rhizosphere. Our results demonstrated that Amaranthus viridis (family Amaranthaceae), Conyza bonariensis, Emilia fosbergii, Galinsoga parviflora, Gnaphalium purpureum (Asteraceae), Raphanus sativus, Lepidium virginicum (Brassicaceae), Commelina benghalensis (Commelinaceae), Ipomoea triloba (Convolvulaceae), Cyperus rotundus (Cyperaceae), Senna obtusifolia (Fabaceae), Digitaria insularis (Poaceae), Nicandra physalodes, and Solanum americanum (Solanaceae) are potential hosts for Cff. Their eradication in common bean fields is recommended, especially in fields with a history of bacterial wilt occurrence.
机译：杂草是重要的替代病原体，负责植物疗法细菌的生存和传播。我们的研究评估了杂草的潜力作为Flaccumfaciens PV的宿主。 Flaccumfaciens（CFF），细菌枯萎病的因果剂，普通豆的主要疾病之一。在Phyllophere和21次杂草的根际评估CF的生存期，在2018年和2019年的四个实验中，通过喷洒细菌悬浮液（10（7）CFU / ml）接种植物的空中部分。 CFF，而生长盆的土壤被相同的悬浮液感染。 CFF存活每7天评估每7天70天。通过PCR用特定引物CFFFR2和CFFREV4证实细菌的身份，来自所有样品中回收的菌株。主成分分析（PCA）表明，高温降雨量降低了近距离的CFF存活率，而高温降低了根际细菌的存活率。我们的结果表明，Amaranthus viridis（amanthaceae），Conyza Bonariensis，艾米利亚Fosbergii，Gnaphalium purpureum（Asteraceae），Raphanus sativus，Lepidium v​​irginicum（Brassicaceae），CommoMoea Triloba（Convolvulaceae），Cypetus rotundus（ Cyperaceae），塞纳·霍氏伞（Fabaceae），Digitaria Insularis（Poaceae），Nicandra Fheaporodes和Solanum Americanum（Solanaceae）是CFF的潜在主体。建议在共同豆类领域中的消除，特别是在具有细菌枯萎病史的领域。

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