Bacterial Diseases of Crop Plants

Borkar, S. G.; Yumlembam, Rupert Anand

doi:10.1201/9781315367972

Cited by 23 publications

(17 citation statements)

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“…The bacterial plant pathogens which infect the plant root to cause wilting are generally localized and infectious in vascular tissues. 2 The presence of these bacteria in vascular tissues is shown by string test. 1 However in pomegranate wilt the bacterial pathogen Klebsiella pneumoniae infect the root bark comprising of epidermal tissues and cortex and incite the root bark necrosis symptoms.…”

Section: Discussionmentioning

confidence: 99%

Histopathology of Klebsiella pneumoniae strain Borkar inciting root bark necrosis and wilt in pomegranate

Sg¹,

Ts²

2018

JABB

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Histopathology of root bark necrosis and wilt in pomegranate incited by Klebsiella pneumoniae strain Borkar revealed that the bacterial infection was non-vascular in nature. The bacteria infect the epidermal layer and cortex of the bark tissues which are easily peeled off. Due to absence of root bark, the absorption of water and food material is hindered which results in wilting of the pomegranate plant. All other plant pathogenic bacteria inducing wilting in other plants infect the vascular system of the plant which finally leads to plant death, however the Klebsiella pneumoniae strain Borkar inciting root bark necrosis and wilt in pomegranate differed from other plant pathogenic bacteria by infecting only the cortex and epidermal cells of root bark to induce wilting in infected pomegranate plants.

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Section: Discussionmentioning

confidence: 99%

Histopathology of Klebsiella pneumoniae strain Borkar inciting root bark necrosis and wilt in pomegranate

Sg¹,

Ts²

2018

JABB

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“…Agricultural ecosystems are impacted by numerous bacterial plant pathogens, for instance Pectobacterium carotovorum responsible for soft rot on various hosts such as potatoes or Chinese cabbages (110,111), Erwinia amylovora responsible for fire blight (112,113), or A. tumefaciens causing crown gall disease (114,115). These and other diseases have a significant economic impact on agriculture and on the quantity and quality of food (116,117), hence the interest of the QQ approach to control diseases caused by bacterial plant pathogens.…”

Section: Agriculturementioning

confidence: 99%

Engineering acyl-homoserine lactone-interfering enzymes toward bacterial control

Billot

Plener

Jacquet

et al. 2020

Journal of Biological Chemistry

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Enzymes able to degrade or modify acyl-homoserine lactones (AHL) have drawn considerable interest for their ability to interfere with the bacterial communication process referred to as Quorum Sensing (QS). Many proteobacteria use AHL to coordinate virulence and biofilm formation in a cell density-dependent manner, thus AHL-interfering enzymes constitute new promising antimicrobial candidates. Among these, lactonases and acylases, have been particularly studied. These enzymes have been isolated from various bacterial, archaeal or eukaryotic organisms and have been evaluated for their ability to control several pathogens. Engineering studies on these enzymes were carried out and successfully modulated their capacity to interact with specific AHL, increase their catalytic activity and stability or enhance their biotechnological potential. In this review, special attention is paid to the screening, engineering and applications of AHL-modifying enzymes. Prospects and future opportunities are also discussed with view to developing potent candidates for bacterial control.

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“…The bacterium was isolated by following the routine method of plant pathogenic bacterial isolation then identified. 3…”

Section: The Bacterium Klebsiella Pneumoniaementioning

confidence: 99%

Pathogenic potentiality of the bacterium of Klebsiella pneumoniae strain Borkar on different plants

Sg¹,

Ts²

2018

JABB

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Klebsiella pneumoniae causes a fatal disease in human being. The pathogen is associated with respiratory tract and lung infection responsible for respiratory mechanism. K. pneumoniae strain Borkar was also found to affect the respiratory mechanism of plant root system in Solanaceous plants. The bacterium blocks the root respiration, producing anaerobic condition and alcohol emitting foul smell in the root surrounding, which results in wilting and death of the plants (plant mortality). The symptoms of plant mortality include the wilting of affected plant seedlings and foul smell of the root system. The association of the bacterium was observed on all over the root surface but not in the root tissues. There were no changes in the root morphology or its discolouration occurred. The bacterium K.pneumoniae in human being as well as in plant seems to affect the respiratory mechanism. The wilting/death of seedlings or plants caused due to hindrance in root respiration are termed as plan mortality. The seedlings grown n soil infested with K.pneumoniae dies within a week period. In host range studies of the bacterium, out of 32 crop plants tested, only 6 were found to be susceptible to get plant mortality symptoms. These were tomato, chilli and eggplant seedlings, which showed wilting in 8 days, whereas ladies finger, green gram and horse gram showed wilting in 21, 22 and 31 days, respectively.

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Bacterial Diseases of Crop Plants

Cited by 23 publications

References 0 publications

Histopathology of Klebsiella pneumoniae strain Borkar inciting root bark necrosis and wilt in pomegranate

Histopathology of Klebsiella pneumoniae strain Borkar inciting root bark necrosis and wilt in pomegranate

Engineering acyl-homoserine lactone-interfering enzymes toward bacterial control

Pathogenic potentiality of the bacterium of Klebsiella pneumoniae strain Borkar on different plants

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