Disease-reducing effects of aqueous leaf extract of Kalanchoe pinnata on rice bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae involve induced resistance

2017 ◽  
Vol 100 ◽  
pp. 57-66 ◽  
Author(s):  
Nguyễn Đắc Khoa ◽  
Trương Văn Xạ ◽  
Lâm Tấn Hào
Keyword(s):  
Induced Resistance ◽  
Leaf Extract ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Kalanchoe Pinnata ◽  
Aqueous Leaf Extract

scholarly journals Response of a local rice variety Pandanwangi to infection of bacterial leaf blight Xanthomonas oryzae pv. oryzae strain III, IV, and VIII

2021 ◽  
Vol 905 (1) ◽  
pp. 012068
Author(s):  
Hadiwiyono ◽  
S H Poromarto ◽  
S Widono ◽  
R F Rizal
Keyword(s):  
Rice Variety ◽  
Leaf Blight ◽  
Rice Production ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Artificial Inoculation ◽  
Limiting Factors ◽  
Bacterial Suspension ◽  
West Java ◽  
Local Cultivar

Abstract Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae (Xoo) is one of the limiting factors in rice production. A local cultivar, rice “Pandanwangi” is a superior variety much preferred and cultivated by the farmers in Cianjur, West Java, Indonesia. The information about the response of “Pandangwangi” to Xoo is still poorly understood. This paper reports the results of the evaluation of “Pandanwangi” response against BLB. This research was conducted in a greenhouse with artificial inoculation using Xoo strains III, IV, and VIII with bacterial suspension at 108 cfu.mL−1. The results showed that the response of cv Pandanwangi to Xoo infection was different from the strain of Xoo. “Pandanwangi” cultivar was susceptible to Xoo strain III and VIII and very susceptible to strain IV.

scholarly journals Discovery of Novel Dihydrolipoamide S-Succinyltransferase Inhibitors Based on Fragment Virtual Screening

2021 ◽  
Vol 22 (23) ◽  
pp. 12953
Author(s):  
Chengqian Wei ◽  
Junjie Huang ◽  
Yu Wang ◽  
Yifang Chen ◽  
Xin Luo ◽  
...  
Keyword(s):  
Virtual Screening ◽  
Antibacterial Agents ◽  
High Efficiency ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Extracellular Polysaccharides ◽  
Bacterial Leaf Streak ◽  
Bacterial Diseases ◽  
Sulfone Derivatives

A series of new oxadiazole sulfone derivatives containing an amide moiety was synthesized based on fragment virtual screening to screen high-efficiency antibacterial agents for rice bacterial diseases. All target compounds showed greater bactericidal activity than commercial bactericides. 3-(4-fluorophenyl)-N-((5-(methylsulfonyl)-1,3,4-oxadiazol-2-yl)methyl)acrylamide (10) showed excellent antibacterial activity against Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola, with EC50 values of 0.36 and 0.53 mg/L, respectively, which were superior to thiodiazole copper (113.38 and 131.54 mg/L) and bismerthiazol (83.07 and 105.90 mg/L). The protective activity of compound 10 against rice bacterial leaf blight and rice bacterial leaf streak was 43.2% and 53.6%, respectively, which was superior to that of JHXJZ (34.1% and 26.4%) and thiodiazole copper (33.0% and 30.2%). The curative activity of compound 10 against rice bacterial leaf blight and rice bacterial leaf streak was 44.5% and 51.7%, respectively, which was superior to that of JHXJZ (32.6% and 24.4%) and thiodiazole copper (27.1% and 28.6%). Moreover, compound 10 might inhibit the growth of Xanthomonas oryzae pv. oryzae and Xanthomonas oryzae pv. oryzicola by affecting the extracellular polysaccharides, destroying cell membranes, and inhibiting the enzyme activity of dihydrolipoamide S-succinyltransferase.

Riboflavin (Vitamin B2) mediated defence induction against bacterial leaf blight: probing through chlorophyll a fluorescence induction O–J–I–P transients

2018 ◽  
Vol 45 (12) ◽  
pp. 1251 ◽  
Author(s):  
Shasmita ◽  
Harekrushna Swain ◽  
Anuprita Ray ◽  
Pradipta K. Mohapatra ◽  
Ramani K. Sarkar ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Oryza Sativa L ◽  
Bacterial Pathogen ◽  
Fluorescence Induction ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Yield Data ◽  
Progress Curve ◽  
Moderately Resistant

Bacterial leaf blight (BLB) is a serious threat for rice (Oryza sativa L.) cultivation caused by the bacterial pathogen Xanthomonas oryzae pv. oryzae. The pathogen mainly damages the leaf chlorophyllous tissue, resulting in poor photosynthesis and causing up to 50% reductions in grain yield. In the present work, we have compared the structural and functional ability of the chloroplast of three varieties of rice with different degrees of susceptibility (TN1, highly susceptible; IR-20, moderately resistant; DV-85, resistant to BLB) treated with riboflavin (1 and 2 mM) and infected with BLB, with chlorophyll fluorescence as a tool. As indicated by the chlorophyll fluorescence technique, the disease progress curve and yield data, riboflavin acted as an effective vitamin for inducing resistance against BLB. Plants treated with riboflavin showed improved PSII activity, more chlorophyll content and higher yield than the diseased plants.

Diversity of Bacteriophages Infecting Xanthomonas oryzae pv. oryzae in Paddy Fields and Its Potential to Control Bacterial Leaf Blight of Rice

2014 ◽  
Vol 24 (6) ◽  
pp. 740-747 ◽  
Author(s):  
Jong-Chan Chae ◽  
Nguyen Bao Hung ◽  
Sang-Mi Yu ◽  
Ha Kyung Lee ◽  
Yong Hoon Lee
Keyword(s):  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Paddy Fields ◽  
Bacterial Leaf Blight

scholarly journals Eco-Friendly Management of Rice Diseases

2015 ◽  
Vol 3 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Md. Amanut Ullah Razu ◽  
Ismail Hossain
Keyword(s):  
Leaf Spot ◽  
Leaf Extract ◽  
Sheath Blight ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Curvularia Lunata ◽  
Brown Leaf Spot ◽  
Brown Leaf ◽  
Clove Extract ◽  
Field And Laboratory Conditions

Comparative efficacy of BAU-Biofungicide (2%), a product of Trichoderma harzianum, Garlic (Allium sativum) clove extract (5%), Allamanda(Allamanda cathartica) leaf extract (5%), Bion (25ppm), Amistar (0.1%) and Tilt 250EC (0.1%) were evaluated for eco-friendly managementof diseases of rice cv. BRRI Dhan-49 under field and laboratory conditions from July,2013 to March,2014. The field experiment was carriedout following Randomised Complete Block Design and the laboratory experiments were done following Completely Randomized Design.Brown spot, Narrow brown leaf spot, Bacterial leaf blight and Sheath blight were recorded in the field. The lowest incidence of brown spotand narrow brown leaf spot was observed in plots treated with BAU-Biofungicide and that of bacterial leaf blight was observed in plots sprayedwith Allamanda leaf extract. In case of sheath blight, the lowest incidence was observed in BAU-Biofungicide sprayed plots. The highest grainyield (3680.34kg/ha) was recorded in plots sprayed with BAU-Biofungicide which is 40.56% higher over control. The highest seed germination(%) was recorded when seeds were treated with Garlic clove extract (89.29%) followed by BAU-Biofungicide (87.30%). The prevalence ofseed-borne fungi was investigated by blotter method. The identified seed-borne fungal species were Bipolaris oryzae, Fusarium oxysporum,Fusarium moniliforme, Curvularia lunata, Aspergillus niger and Aspergillus flavus. Maximum reduction of seed-borne infection of pathogenswas obtained by treating seeds with BAU-Biofungicide (2% of seed weight).DOI: http://dx.doi.org/10.3126/ijasbt.v3i1.11977    Int J Appl Sci Biotechnol, Vol. 3(1): 80-88 

scholarly journals Mapping bacterial leaf blight disease of rice (Xanthomonas oryzae pv oryzae) in North Sumatra

2020 ◽  
Vol 454 ◽  
pp. 012160
Author(s):  
Safrizal ◽  
Lisnawita ◽  
K Lubis ◽  
F J M Maathuis ◽  
I Safni
Keyword(s):  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Blight Disease ◽  
North Sumatra

scholarly journals Antimicrobial peptide melittin against Xanthomonas oryzae pv. oryzae, the bacterial leaf blight pathogen in rice

2016 ◽  
Vol 100 (11) ◽  
pp. 5059-5067 ◽  
Author(s):  
Wei Shi ◽  
Caiyun Li ◽  
Man Li ◽  
Xicui Zong ◽  
Dongju Han ◽  
...  
Keyword(s):  
Antimicrobial Peptide ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight
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