Phytopathogenic Bacteria and Plant Diseases

2019 ◽  
Author(s):  
B.S. Thind
Keyword(s):  
Plant Diseases ◽  
Phytopathogenic Bacteria

scholarly journals Chemical composition and antibacterial activity of essential oils of two species of Lamiaceae against phytopathogenic bacteria

2015 ◽  
Vol 64 (2) ◽  
pp. 121-127 ◽  
Author(s):  
ARZU GORMEZ ◽  
SEDAT BOZARI ◽  
DERYA YANMIS ◽  
MEDİNE GULLUCE ◽  
FİKRETTİN SAHIN ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Control Plant ◽  
Antibacterial Properties ◽  
Antibacterial Activities ◽  
Plant Diseases ◽  
Phytopathogenic Bacteria ◽  
Dilution Assay ◽  
Diffusion Assay

In this study, we aimed to determine chemical composition and antibacterial activities of Satureja hortensis and Calamintha nepeta against to 20 phytopathogenic bacteria causing serious crop loss. The essential oils of S. hortensis and C. nepeta were isolated by the hydrodistillation method and the chemical composition of the essential oils were analyzed by GC-MS. The antibacterial properties of the essential oils were evaluated against 20 phytopathogenic bacteria through Disc diffusion assay and micro dilution assay. The results revealed that the essential oils of S. hortensis and C. nepeta have significant antibacterial activity. Furthermore, the findings of the study are valuable for future investigations focusing on the alternative natural compounds to control plant diseases.

scholarly journals Bioactive Secondary Metabolites from Trichoderma spp. against Phytopathogenic Bacteria and Root-Knot Nematode

2020 ◽  
Vol 8 (3) ◽  
pp. 401 ◽  
Author(s):  
Raja Asad Ali Khan ◽  
Saba Najeeb ◽  
Zhenchuan Mao ◽  
Jian Ling ◽  
Yuhong Yang ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Bacterial Cell ◽  
Pathogenic Bacteria ◽  
Parasitic Nematode ◽  
Control Plant ◽  
Plant Diseases ◽  
Growth Media ◽  
Trichoderma Spp ◽  
Phytopathogenic Bacteria ◽  
Bioactive Secondary Metabolites

Losses in crops caused by plant pathogenic bacteria and parasitic nematode are increasing because of a decrease in efficacy of traditional management measures. There is an urgent need to develop nonchemical and ecofriendly based management to control plant diseases. A potential approach of controlling plant disease in the crops is the use of biocontrol agents and their secondary metabolites (SMs). Luckily fungi and especially the genus Trichoderma comprise a great number of fungal strains that are the potential producer of bioactive secondary metabolites. In this study secondary metabolites from ten Trichoderma spp. were evaluated for their antibacterial and nematicidal potential against phytopathogenic bacteria Ralstonia solanacearum, Xanthomonas compestris and plant parasitic nematode Meloidogyne incognita. Five different growth media were evaluated for the production of SMs. It was shown that SMs of different Trichoderma spp. obtained on different growth media were different in the degree of their bioactivity. Comparison of five growth media showed that SMs produced on solid wheat and STP media gave higher antibacterial activity. SMs of T. pseudoharzianum (T113) obtained on solid wheat media were more effective against the studied bacteria followed by SMs from T. asperelloides (T136), T. pseudoharzianum (T129) and T. pseudoharzianum (T160). Scanning electron microscopy (SEM) was further conducted to observe the effect of SMs on bacterial cell morphology. As evident from the SEM, SMs produced severe morphological changes, such as rupturing of the bacterial cell walls, disintegration of cell membrane and cell content leaking out. SMs from T. viridae obtained on liquid STP and solid wheat media showed the highest percent of M. incognita juveniles (J2s) mortality and inhibition in egg hatching of M. incognita. The results of our study suggest that T. pseudoharzianum (T113) and T. viridae could be selected as an effective candidate for SMs source against phytopathogenic bacteria and M. incognita respectively.

scholarly journals PROSPECTS FOR MICROBIAL ANTAGONISTS USE IN PROTECTION OF AGROECOSYSTEMS FROM PHYTOPATHOGENES

2011 ◽  
Vol 13 ◽  
pp. 23-41
Author(s):  
I.K. Kurdish
Keyword(s):  
Plant Diseases ◽  
Phytopathogenic Bacteria ◽  
Bacteria And Fungi

Thepapercoverstheanalysisoftherelationshipofmicroorganisms – antagonists and pathogens in agroecosystems which is an important factor of plant diseases prevalence control. Among the studied microorganisms the most important antagonist of phytopathogenic bacteria and fungi in agricoenosis were the representatives of the genera Pseudomonas, Bacillus, Trichoderma, Chaetomium and some other microorganisms. Several studied strains-antagonists were selected as the basis or as the perspective ones for the production of microbial preparations for pathogens control in agroecosystems and improvement of plants productivity.

scholarly journals Essential oils and plant extracts in the control of phytopathogenic bacteria and fungi

Biljni lekar ◽  
2021 ◽  
Vol 49 (2) ◽  
pp. 178-187
Author(s):  
Nikola Laćarac
Keyword(s):  
Essential Oils ◽  
Plant Extracts ◽  
Phytopathogenic Fungi ◽  
Organic Production ◽  
Plant Diseases ◽  
Botanical Pesticides ◽  
Phytopathogenic Bacteria ◽  
The Past ◽  
Production Concept ◽  
Bacteria And Fungi

Some plants contain various substances that have pesticidal properties. Since these substances are extracted from plants they are called botanical pesticides. Botanical pesticides can be used as fungicides, bactericides, viricides, herbicides, insecticides, nematicides and rodenticides. Essential oils and plant extracts are most commonly used as botanical pesticides. In the past few years, we have witnessed a tendency to reduce the use of conventional pesticides and for that reason more and more attention is paid to the testing and application of essential oils and plant extracts for this purpose. These compounds have a number of advantages over conventional pesticides, especially when it comes to preventing the occurrence of diseases caused by phytopathogenic bacteria and phytopathogenic fungi as the most common and most important causes of plant diseases. Plant extracts and essential oils can be used at a time when the application of conventional pesticides is impossible due to the observance of the waiting period, and they are also a significant weapon in integrated and organic production concept.

scholarly journals Molecular detection of exotic phytopathogenic bacteria a case study involving cankerlike symptoms on citrus

2002 ◽  
Vol 55 ◽  
pp. 53-57 ◽  
Author(s):  
R.K. Taylor ◽  
J.L. Tyson ◽  
R.A. Fullerton ◽  
C.N. Hale
Keyword(s):  
Diagnostic Procedures ◽  
Citrus Canker ◽  
Causal Agent ◽  
Plant Diseases ◽  
Molecular Diagnostic ◽  
Citrus Industry ◽  
Accurate Identification ◽  
Phytopathogenic Bacteria ◽  
Citrus Leaves

Early detection and accurate diagnoses of plant diseases are crucial if New Zealands horticultural industries are to be protected from the destructive effects of new introductions of phytopathogenic bacteria Citrus canker caused by Xanthomonas axonopodis pv citri (Xac) was eradicated from New Zealand in 1972 but continues to be a biosecurity threat to the citrus industry here In this study we evaluated and adapted molecular diagnostic procedures for the detection of exotic phytopathogenic bacteria These techniques were used to identify the bacteria isolated from the cankerlike symptoms observed on citrus leaves in Kerikeri and allowed the elimination of Xac as the causal agent Although the symptoms were similar to citrus canker the causal agent was found to be Elsinoe fawcettii The applications of the developed techniques for accurate identification of the pathogen on citrus are discussed

Spraying for the Prevention of Plant Diseases

1892 ◽  
Vol 33 (853supp) ◽  
pp. 13635-13636
Author(s):  
Joseph F. James
Keyword(s):  
Plant Diseases

Antagonism against phytopathogenic bacteria and fungi and phytoregulating activity of streptomycetes of chernozems Moldova

2019 ◽  
Vol 326 (1) ◽  
pp. 131-136
Author(s):  
S.A. Burtseva ◽  
◽  
M.N. Byrsa ◽  
S.N. Maslobrod ◽  
◽  
...  
Keyword(s):  
Phytopathogenic Bacteria ◽  
Bacteria And Fungi

Image processing in plant diseases detection

2019 ◽  
Vol 1 (2) ◽  
pp. 10-15
Author(s):  
K Santhasheela ◽  
Deepan Chakravarthi AV
Keyword(s):  
Image Processing ◽  
Plant Diseases
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