History of Kiwifruit Bacterial Diseases in Italy

Balestra, Giorgio Mariano; Renzi, M.; Ricci, Liviana; Taratufolo, M.C.; Quattrucci, A.; Rossetti, Antonio; Mazzaglia, A.

doi:10.17660/actahortic.2011.913.60

Cited by 6 publications

(7 citation statements)

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“…actinidiae, which causes kiwifruit canker, is another devastating plant pathogen and has received significant attention in recent years. [3][4][5][6] Thus, there has been considerable interest in development of bactericides for Ralstonia solanacearum and Pseudomonas syringae pv. actinidiae.…”

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confidence: 99%

Synthesis and Antibacterial Activities of Yanglingmycin Analogues

Dan

Tan

et al. 2015

Chem. Pharm. Bull.

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The synthesis of Yanglingmycin and its enantiomer, along with eighteen Yanglingmycin analogues is reported. The structures were confirmed mainly by analyses of NMR spectral data. Antibacterial activity assays showed that Yanglingmycin and some of its analogues exhibited significant antibacterial activities against two important agricultural pathogenic bacteria, Ralstonia solanacearum and Pseudomonas syringae pv. actinidiae, with minimum inhibitory concentration (MIC) values ranging from 3.91 to 15.62 µg/mL. The antibacterial activities exhibited by Yanglingmycin and its analogues are promising, suggesting potential in the development of compounds for novel bactericides.Key words Yanglingmycin; structural analogue; substituted cyclic azole; antibacterial activity Bacterial diseases pose a major threat to agricultural production worldwide. For example, Ralstonia solanacearum, which causes plant bacterial wilt, is one of the most destructive plant pathogens, and affects many regions of the world. 1)It is estimated that R. solanacearum is responsible for US$ 1 billion in losses each year.2) Pseudomonas syringae pv. actinidiae, which causes kiwifruit canker, is another devastating plant pathogen and has received significant attention in recent years.3-6) Thus, there has been considerable interest in development of bactericides for Ralstonia solanacearum and Pseudomonas syringae pv. actinidiae. Unfortunately, there have been few reports of effective bactericides against these pathogens. In the process of screening new agricultural antibiotics, we report the synthesis a new broad spectrum antibiotic, Yanglingmycin (Fig. 1), which was found to be effective against the previously mentioned pathogens. 7) Although Yanglingmycin can be isolated from the fermentation broth of Streptomyces djakartensis, the yield is too low to conduct experiments to determine the mechanism of bactericidal action. In order to investigate the bactericidal activities of Yanglingmycin and its analogues, Yanglingmycin and its analogues were designed and synthesized. In this paper, Yanglingmycin and its enantiomer and eighteen Yanglingmycin analogues were synthesized and their antibacterial activities against Ralstonia solanacearum and Pseudomonas syringae pv. actinidiae are reported. ResultsChemistry Chart 1 describes the synthesis of all target compounds. Benzonitrile, 2-hydroxybenzonitrile, and 4-hydroxybenzonitrile were used as starting material for the Pinner reaction to obtain the corresponding methyl benzimidate hydrochlorides, 8) which were then reacted with each the following compounds: L-serine methyl ester hydrochloride, D-serine methyl ester hydrochloride, L-cysteine methyl ester hydrochloride, D-cysteine methyl ester hydrochloride, L-2,3-diaminopropionic acid methyl ester hydrochloride, and D-2,3-diaminopropionic acid methyl ester hydrochloride.9,10) Amino acid methyl ester hydrochlorides were obtained by reacting the corresponding amino acids with AcCl in MeOH.11) The products were reduced by LiAlH 4 to obtain Yanglingmycin and its an...

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mentioning

confidence: 99%

Synthesis and Antibacterial Activities of Yanglingmycin Analogues

Dan

Tan

et al. 2015

Chem. Pharm. Bull.

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“…2). The resultant cellulosic nanostructures, were blended with natural chitosan (CH) and, combined with carvacrol, utilized as active agent to inhibit bacterial development in packaging applications [11][12][13].…”

Section: Agricultural Applicationsmentioning

confidence: 99%

“…Their involvement aims to reduce the plastic use as well as to improve consumer health protection. Nanomaterial applications include the use of active ingredients (AIs) as, phenols, terpenes, etc., with antimicrobial and antioxidant properties resulting able to preserve relevant aspects like shelf-life, quality and safety, and sensory properties of food [10][11][12][13][14][15][16]. These approaches represent the core of active food packaging concept and some recent research activities pointed out the important role of nanocellulose (CNC) and/or nanolignin (LNP), also combined with others additives, as active nanomaterials particular useful in active food packaging [15][16][17].…”

Section: Packaging Applicationsmentioning

confidence: 99%

Innovative nanotechnological tools in plant and food protection

Balestra¹,

Fortunati²,

Giovanale³

et al. 2018

AIP Conference Proceedings

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Nanotechnology is a promising field of interdisciplinary research and its applications into agriculture industry is getting attention due to the potential benefits that nanomaterials can guarantee in several aspects such as pests management. Traditional plant protection strategies often result insufficient, and application of pesticides usually produced negative effects for humans and the environment. Here are described nanotechnology applications that would provide green and efficient alternatives for the management of plant diseases induced by several plant pathogens. Furthermore, new sustainable, antimicrobial and antioxidant systems, also at the nanoscaled, were here reported concerning food packaging sector as valid eco-friendly possibility to improve the safety and quality of food products.

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“…Currently, diseases caused by P. syringae have spread worldwide, including the United States (Koike et al, 1999), Australia (Noble et al, 2006), and Korea (Myung et al, 2011). Typically, diseases affecting the leaves directly impact the tea yield, whereas those affecting the stalk and roots impact the overall survival of tea plants (Balestra et al, 2009;Ferrante and Scortichini, 2009). Tea bud blight mainly affects the tender buds and leaves.…”

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confidence: 99%

Biological characteristics of the bacteriophage LDT325 and its potential application against the plant pathogen Pseudomonas syringae

Liu,

Wang,

Huang

et al. 2024

Front. Microbiol.

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Bud blight disease caused by Pseudomonas syringae is a major bacterial disease of tea plants in China. Concerns regarding the emergence of bacterial resistance to conventional copper controls have indicated the need to devise new methods of disease biocontrol. Phage-based biocontrol may be a sustainable approach to combat bacterial pathogens. In this study, a P. syringae phage was isolated from soil samples. Based on morphological characteristics, bacteriophage vB_PsS_LDT325 belongs to the Siphoviridae family; it has an icosahedral head with a diameter of 53 ± 1 nm and nonretractable tails measuring 110 ± 1 nm. The latent period and burst size of the phage were 10 min and 17 plaque-forming units (PFU)/cell, respectively. Furthermore, an analysis of the biological traits showed that the optimal multiplicity of infection (MOI) of the phage was 0.01. When the temperature exceeded 60°C, the phage titer began to decrease. The phage exhibited tolerance to a wide range of pH (3–11) and maintained relatively stable pH tolerance. It showed a high tolerance to chloroform, but was sensitive to ultraviolet (UV) light. The effects of phage LDT325 in treating P. syringae infections in vivo were evaluated using a tea plant. Plants were inoculated with 2 × 107 colony-forming units (CFU)/mL P. syringae using the needle-prick method and air-dried. Subsequently, plants were inoculated with 2 × 107 PFU/mL LDT325 phage. Compared with control plants, the bacterial count was reduced by 1 log10/0.5 g after 4 days in potted tea plants inoculated with the phage. These results underscore the phage as a potential antibacterial agent for controlling P. syringae.

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History of Kiwifruit Bacterial Diseases in Italy

Cited by 6 publications

References 0 publications

Synthesis and Antibacterial Activities of Yanglingmycin Analogues

Synthesis and Antibacterial Activities of Yanglingmycin Analogues

Innovative nanotechnological tools in plant and food protection

Biological characteristics of the bacteriophage LDT325 and its potential application against the plant pathogen Pseudomonas syringae

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