Bacterial spot of Chinese taro (Alocasia cucullata) in Brazil induced by Pantoea agglomerans

A new leaf blight disease of oat (Avena sativa) was observed in many oat fields in Huan county, Gansu Province of China, during 2018–2019. Typical symptoms appeared as yellow necrotic and water‐soaked lesions. The lesions developed from tip to base of leaves and eventually resulted in leaf withering. Disease incidence on plants (leaves) was approximately 36%–100%. A gram‐negative bacterium was isolated from the necrotic lesions of all samples. Coupled with multigene sequence (16S rRNA and gyrB gene) analyses, Biolog Gen III MicroStation, morphological, physiological, and biochemical characterization identified the pathogen as Pantoea agglomerans. Pathogenicity tests by wounding and injection inoculations in the greenhouse established that P. agglomerans could induce typical symptoms as observed in the field. The infection rate in leaves was 44%–71% after 14 days. In addition, host range tests showed that P. agglomerans could infect other plant hosts, including Sorghum sudanense, Medicago sativa, Fagopyrum esculentum, Setaria italica, and Zea mays. This is the first report of P. agglomerans causing bacterial leaf blight disease (LBD) on oat in China. The current study can provide a foundation for the prevention of this disease in the future.

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“…cepa (Edens et al, 2006; Tho et al, 2015), A . cucullata (Romeiro et al, 2010), M . nana (He et al, 2011), V .…”

Section: Discussionmentioning

confidence: 99%

A new bacterial leaf blight disease of oat (Avena sativa) caused by Pantoea agglomerans in China

et al. 2021

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“…Pathogenic strains of P. agglomerans can cause disease in a wide range of plants, including sweetcorn [ 74 ], pea [ 75 ], sweet potato [ 76 ], sugarcane [ 77 ], bamboo [ 78 ], wheat [ 79 ], rice [ 80 ], cotton [ 74 ], beet [ 81 ], eucalyptus [ 82 , 83 ], and the ornamental plant Alocasia cucullata (popular Chinese taro) [ 84 ].…”

Section: Pathogenic Potential Of P Agglomerans And...mentioning

confidence: 99%

Opposite Sides of Pantoea agglomerans and Its Associated Commercial Outlook

et al. 2022

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Multifaceted microorganisms such as the bacterium Pantoea colonize a wide range of habitats and can exhibit both beneficial and harmful behaviors, which provide new insights into microbial ecology. In the agricultural context, several strains of Pantoea spp. can promote plant growth through direct or indirect mechanisms. Members of this genus contribute to plant growth mainly by increasing the supply of nitrogen, solubilizing ammonia and inorganic phosphate, and producing phytohormones (e.g., auxins). Several other studies have shown the potential of strains of Pantoea spp. to induce systemic resistance and protection against pests and pathogenic microorganisms in cultivated plants. Strains of the species Pantoea agglomerans deserve attention as a pest and phytopathogen control agent. Several of them also possess a biotechnological potential for therapeutic purposes (e.g., immunomodulators) and are implicated in human infections. Thus, the differentiation between the harmful and beneficial strains of P. agglomerans is mandatory to apply this bacterium safely as a biofertilizer or biocontroller. This review specifically evaluates the potential of the strain-associated features of P. agglomerans for bioprospecting and agricultural applications through its biological versatility as well as clarifying its potential animal and human health risks from a genomic point of view.

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“…Also in this case, the pathogens were transmitted by insect vectors, namely the onion thrips (Thrips tabaci; Thysanoptera: Thripidae) [81]. P. agglomerans was also shown to cause diseases of other plants, such as: • bacterial damage to the various organs of grass species, including pest species called couch grass (Elytrigia repens), and cultivable grass called onion couch (Arrhenatherum elatius) [82]; • black spot necrosis of the leaves of beach pea (Lathyrus maritimus) growing on the shorelines of Newfoundland, Canada [83]; • bacterial spot disease of Chinese taro (Alocasia cucullata), an ornamental species commonly cultivated in Brazil [84]; • reduction of the growth of bamboo (Guadua angustifolia) shoots cultured in vitro [85]; • brown apical necrosis of walnut (Juglans regia) in China [86]; • leaf blight and vascular wilt in maize (Zea mays) and sorghum (Sorghum bicolor) in Mexico [87]; • leaf blight in rice (Oryza sativa) in Korea [88]. P. agglomerans has been originally described by Kim et al [89] as a cause of the brown discoloration of the inner glume (palea) of rice; however, subsequent investigations [90,91] showed that the true disease agent was Pantoea ananatis, a related species.…”

Section: Plant and Mushroom Pathogenmentioning

confidence: 99%

Pantoea agglomerans: a mysterious bacterium of evil and good. Part III. Deleterious effects: infections of humans, animals and plants

Dutkiewicz¹,

Maćkiewicz²,

Lemieszek³

et al. 2016

Ann Agric Environ Med.

182

122

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Pantoea agglomerans, a bacterium associated with plants, is not an obligate infectious agent in humans. However, it could be a cause of opportunistic human infections, mostly by wound infection with plant material, or as a hospital-acquired infection, mostly in immunocompromised individuals. Wound infection with P. agglomerans usually follow piercing or laceration of skin with a plant thorn, wooden splinter or other plant material and subsequent inoculation of the plant-residing bacteria, mostly during performing of agricultural occupations and gardening, or children playing. Septic arthritis or synovitis appears as a common clinical outcome of exogenous infection with P. agglomerans, others include endophthalmitis, periostitis, endocarditis and osteomyelitis. Another major reason for clinical infection with P. agglomerans is exposure of hospitalized, often immunodeficient individuals to medical equipment or fluids contaminated with this bacterium. Epidemics of nosocomial septicemia with fatal cases have been described in several countries, both in adult and paediatric patients. In most cases, however, the clinical course of the hospital-acquired disease was mild and application of the proper antibiotic treatment led to full recovery. Compared to humans, there are only few reports on infectious diseases caused by Pantoea agglomerans in vertebrate animals. This species has been identified as a possible cause of equine abortion and placentitis and a haemorrhagic disease in dolphin fish (Coryphaena hippurus). P. agglomerans strains occur commonly, usually as symbionts, in insects and other arthropods. Pantoea agglomerans usually occurs in plants as an epi-or endophytic symbiont, often as mutualist. Nevertheless, this species has also also been identified as a cause of diseases in a range of cultivable plants, such as cotton, sweet onion, rice, maize, sorghum, bamboo, walnut, an ornamental plant called Chinese taro (Alocasia cucullata), and a grass called onion couch (Arrhenatherum elatius). Some plant-pathogenic strains of P. agglomerans are tumourigenic, inducing gall formation on table beet, an ornamental plant gypsophila (Gypsophila paniculata), wisteria, Douglas-fir and cranberry. Recently, a Pantoea species closely related to P. agglomerans has been identified as a cause of bacterial blight disease in the edible mushroom Pleurotus eryngii cultivated in China. The genetically governed determinants of plant pathogenicity in Pantoea agglomerans include such mechanisms as the hypersensitive response and pathogenicity (hrp) system, phytohormones, the quorum-sensing (QS) feedback system and type III secretion system (T3SS) injecting the effector proteins into the cytosol of a plant cell.

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Bacterial spot of Chinese taro (Alocasia cucullata) in Brazil induced by Pantoea agglomerans

Cited by 9 publications

References 1 publication

A new bacterial leaf blight disease of oat (Avena sativa) caused by Pantoea agglomerans in China

A new bacterial leaf blight disease of oat (Avena sativa) caused by Pantoea agglomerans in China

Opposite Sides of Pantoea agglomerans and Its Associated Commercial Outlook

<i>Pantoea agglomerans</i>: a mysterious bacterium of evil and good. Part III. Deleterious effects: infections of humans, animals and plants

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