珍珠米-克雷伯氏菌病原系统中珍珠米茎腐病的发病率、症状、病害周期、病害量表和病原特征。

IF 1.8 3区 农林科学 Q2 PLANT SCIENCES Plant Pathology Journal Pub Date : 2024-02-01 DOI:10.5423/PPJ.OA.09.2023.0126
Vinod Kumar Malik, Pooja Sangwan, Manjeet Singh, Pavitra Kumari, Niharika Shoeran, Navjeet Ahalawat, Mukesh Kumar, Harsh Deep, Kamla Malik, Preety Verma, Pankaj Yadav, Sheetal Kumari, Aakash, Sambandh Dhal
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引用次数: 0

摘要

最古老、最广泛栽培的小米是珍珠粟(Pennisetum glaucum (L.) R. Br. Syn.Pennisetum americanum (L.) Leeke),在亚洲和非洲国家的种植面积达 312.00 万公顷。印度被认为是珍珠粟多样性的重要热点地区。在种植珍珠粟的印度哈里亚纳邦,2018 年秋季首次观察到一种由产气性克雷伯氏菌(原肠杆菌)引发的新型灾难性细菌性病害,即珍珠粟茎腐病。病害表现为叶片上出现小到长的条纹,茎干上出现病斑,茎干出现粘稠的腐烂外观。根据 16S rDNA 和 gyrA 基因核苷酸序列进行的分子评估证实,相关细菌与产气克雷伯氏菌非常相似。根据生化检测,分离物也被确定为产气克雷伯氏菌,其中克雷伯氏菌分离物在 D-三卤糖和琥珀酸碱化试验中存在差异。2021-2023 年秋季,该病已蔓延到该州所有珍珠粟种植区,受影响田块的发病率高达 70%。该病造成谷物和饲料损失。拟议的量表由六个等级(0-5)组成,其中 0、1、2、3、4 和 5 分分别代表高度抗病、抗病、中度抗病、中度易感病、易感病和高度易感病。此外,还对病害周期、病原体存活率和可能造成的损失进行了研究,以了解病害的其他特征。
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Stem Rot of Pearl Millet Prevalence, Symptomatology, Disease Cycle, Disease Rating Scale and Pathogen Characterization in Pearl Millet-Klebsiella Pathosystem.

The oldest and most extensively cultivated form of millet, known as pearl millet (Pennisetum glaucum (L.) R. Br. Syn. Pennisetum americanum (L.) Leeke), is raised over 312.00 lakh hectares in Asian and African countries. India is regarded as the significant hotspot for pearl millet diversity. In the Indian state of Haryana, where pearl millet is grown, a new and catastrophic bacterial disease known as stem rot of pearl millet spurred by the bacterium Klebsiella aerogenes (formerly Enterobacter) was first observed during fall 2018. The disease appears in form of small to long streaks on leaves, lesions on stem, and slimy rot appearance of stem. The associated bacterium showed close resemblance to Klebsiella aerogenes that was confirmed by a molecular evaluation based on 16S rDNA and gyrA gene nucleotide sequences. The isolates were also identified to be Klebsiella aerogenes based on biochemical assays, where Klebsiella isolates differed in D-trehalose and succinate alkalisation tests. During fall 2021-2023, the disease has spread all the pearl millet-growing districts of the state, extending up to 70% disease incidence in the affected fields. The disease is causing considering grain as well as fodder losses. The proposed scale, consisting of six levels (0-5), is developed where scores 0, 1, 2, 3, 4, and 5 have been categorized as highly resistant, resistant, moderately resistant, moderately susceptible, susceptible, and highly susceptible disease reaction, respectively. The disease cycle, survival of pathogen, and possible losses have also been studied to understand other features of the disease.

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来源期刊
Plant Pathology Journal
Plant Pathology Journal 生物-植物科学
CiteScore
4.90
自引率
4.30%
发文量
71
审稿时长
12 months
期刊介绍: Information not localized
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