scholarly journals Standardization of culture age, crop growth stages and different methods of inoculation of Xanthomonas oryzae pv. oryzae, A cause bacterial leaf blight in rice (Oryza sativa L.)

2020 ◽  
Vol 13 (1) ◽  
pp. 30-35
Author(s):  
Sonika Deep ◽  
Durga Prasad ◽  
Subhashish Sarkhel
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Crop Growth ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Growth Stages ◽  
Culture Age ◽  
Crop Growth Stages

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.

scholarly journals Marker-assisted selection and gene pyramiding for resistance to bacterial leaf blight disease of rice (Oryza sativa L.)

2019 ◽  
Vol 33 (1) ◽  
pp. 440-455 ◽  
Author(s):  
Samuel Chibuike Chukwu ◽  
Mohd Y. Rafii ◽  
Shairul Izan Ramlee ◽  
Siti Izera Ismail ◽  
Yussuf Oladosu ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Marker Assisted Selection ◽  
Oryza Sativa L ◽  
Gene Pyramiding ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Blight Disease

scholarly journals Effect of Potassium Fertilizer on Development of Bacterial Blight of Rice

1970 ◽  
Vol 46 (1) ◽  
pp. 69-76
Author(s):  
N Begum ◽  
MM Rahman ◽  
MA Bashar ◽  
MA Hossain ◽  
MN Uddin
Keyword(s):  
Disease Severity ◽  
Bacterial Blight ◽  
Oryza Sativa L ◽  
Block Design ◽  
Maximum Yield ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Growth Stages ◽  
Potassium Fertilizer ◽  
Bacterial Blight Of Rice

Effect of five potassium doses viz, recommended dose (RD) (40 kg Murate of Potash(MP)/hector), RD + 10 kg MP/ha, RD + 20 kg MP/ha, RD + 30 kg MP/ha, RD + 40 kg MP /ha to manage bacterial blight of rice were studied during Boro season in 2005. The experiment was laid in Randomized Completely Block Design (RCBD) having three replications. Highest disease severity (55.92%) was observed due to bacterial leaf blight at maximum tillering stage when applied 30 kg MP/ha additional potash. Lowest disease severity (0.45%) of bacterial leaf blight were recorded from the plot where no additional MP was applied but highest yield (4.35 tones/ha) was observed in the plot where additional 20 kg MP/ha was applied. The amount of potassium in the leaves did not vary significantly even after additional application of potassium either 30 or 20 kg MP/ha though it was more (1.31%) when applied 40 kg MP/ha. In another experiment in the present study the lowest disease severity 15.22% and 10.53% were recorded when additional 5kg MP /ha was applied seven days before inoculation at active tillering and panicle initiation stages, respectively. Disease severity was lower in single inoculation compare to multiple inoculations except the plot where 5kg/ha additional potash applied three days before bacterial inoculation. Maximum yield (3.86, 4.38, 4.64 t/ha) was recorded when inoculated at active tillering, panicle initiation and flowering stages separately if potassium was applied seven days before inoculation than those of multiple inoculations. The results suggested that potassium top dressing just before disease initiation was good for higher yield and less disease development. However inoculation in all the growth stages of the crop gave lower yields even potassium application was done at seven or three days before or after inoculation. Key words: Bacterial leaf blight; Oryza sativa L.; Potassium fertilizer DOI: http://dx.doi.org/10.3329/bjsir.v46i1.8109 Bangladesh J. Sci. Ind. Res. 46(1), 69-76, 2011

Introgression of bacterial leaf blight resistance and aroma genes using functional marker-assisted selection in rice (Oryza sativa L.)

Euphytica ◽  
2011 ◽  
Vol 187 (3) ◽  
pp. 313-323 ◽  
Author(s):  
R. K. Salgotra ◽  
B. B. Gupta ◽  
Reginald J. Millwood ◽  
Muthukumar Balasubramaniam ◽  
C. N. Stewart
Keyword(s):  
Oryza Sativa ◽  
Marker Assisted Selection ◽  
Oryza Sativa L ◽  
Leaf Blight ◽  
Functional Marker ◽  
Bacterial Leaf Blight ◽  
Blight Resistance

scholarly journals Seleksi Lapang Ketahanan Beberapa Varietas Padi terhadap Infeksi Hawar Daun Bakteri Strain IV dan VIII

2016 ◽  
Vol 17 (2) ◽  
pp. 80 ◽  
Author(s):  
Lina Herlina ◽  
Tiur S. Silitonga
Keyword(s):  
Oryza Sativa ◽  
Block Design ◽  
Leaf Blight ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Blight ◽  
Bacterial Cells ◽  
Bacterial Strains ◽  
Rice Varieties ◽  
Resistance Reaction ◽  
Index Of Severity

<p>Field Selection on Several Rice Varieties for Resistance to Bacterial Leaf Blight strain IV and VIII. Bacterial leaf blight (BLB) on rice (Oryza sativa) caused by Xanthomonas oryzae pv. oryzae (Xoo) is the major obstruction for rice production. Powerful strategy to control BLB is generally conducted by planting resistant plant. Meanwhile, the main way to explore germplasm as the source of resistance gene is conducted by selection a wide rice varieties. Field selection for resistance to BLB on 150 rice-varieties (BB-Biogen collection) was conducted in 2009 in Cianjur. Three leaves and flag leaves of individual hills at vegetative and flowering stage were inoculated by clipping the leaf tip with scissors which had been connected with a suspension bottle of bacterial cells (109- 1010 cells/ml) of the isolates which represented bacterial groups (strain) IV and VIII, respectively. Each plant was inoculated with one race. Two weeks after inoculation, length of the lesion developed on the inoculated leaf was measured, as an index of severity of infection by BLB. This experiment was treated as Factorial-Randomized Completed Block Design (two factor-with 3 replications, respectively). The resistancyreaction to strain IV and VIII was observed as the variable tested, while the factors measured consists of plant-varieties and two bacterial strains. The results showed that 11 varieties with a resistance-reaction to Xoo strain IV, inwhich 5 varieties poses a consistent resistance-reaction, i.e: Pulu Bolong, Pelopor, Gombal, Barito and Kapuas. While resistancereaction to Xoo strain VIII obtained only one variety : IR42 (score-1), while 17 others showed intermediate resistancy (score-3).</p><p> </p><p><strong>Abstrak</strong></p><p>Penyakit hawar daun bakteri (HDB) yang disebabkan oleh Xanthomonas oryzae pv. oryzae (Xoo) pada padi (Oryza sativa) merupakan faktor pembatas upaya peningkatan produksi padi. Pencarian gen-gen tahan terhadap HDB sangat diperlukan untuk pengendalian penyakit tersebut. Seleksi ketahanan terhadap HDB dilakukan di Cianjur pada MT 2009 terhadap 150 varietas padi koleksi Bank Gen, BB-Biogen. Isolat Xoo yang diuji adalah strain IV dan VIII. Inokulasi dilakukan dua kali, yaitu pada fase vegetatif dan generatif dengan cara menggunting 3-5 cm dari ujung daun dan daun bendera dengan gunting yang telah dihubungkan dengan botol berisi suspensi Xoo strain IV dan VIII (109-1010 sel/ml). Rancangan percobaan yang digunakan dalam penelitian ini adalah acak kelompok faktorial dengan tiga ulangan. Sebagai varietas pembanding tahan digunakan IRBB7 dan pembanding rentan varietas Kencana Bali. Reaksi ketahanan tertinggi terhadap Xoo strain IV ditunjukkan oleh 11 varietas terpilih dengan reaksi agak tahan, lima varietas di antaranya menunjukkan reaksi yang konsisten agak tahan, yaitu varietas Pulu Bolong, Pelopor, Gombal, Barito, dan Kapuas. Reaksi &amp;lsquo;tahan&amp;rsquo; terhadap Xoo strain VIII ditunjukkan oleh satu varietas introduksi IR42. Untuk varietas terpilih dengan reaksi &amp;lsquo;agak tahan&amp;rsquo; terdapat 17 varietas.</p>

scholarly journals Phenotypic Evaluation of Advanced Breeding Lines for Resistance against Bacterial Leaf Blight Disease in Rice (Oryza sativa L.)

2021 ◽  
pp. 305-309
Author(s):  
V. Srujana ◽  
M. Balram ◽  
B. Srinivas ◽  
N. Balram
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Leaf Blight ◽  
Rice Crop ◽  
Bacterial Leaf Blight ◽  
Blight Resistance ◽  
Breeding Lines ◽  
Blight Disease

Bacterial Leaf Blight disease epidemically damaged the rice crop. Absence of resistance against BLB disease in MTU1010 is one of the main reason for these epidemics. Thus, there is urgent need to search for resistant source and subsequently, their phenotypic evaluation to validate the resistant source. In this paper discussing about the highlights of phenotypic evaluation of Bacterial Leaf Blight resistance in MTU1010 NIL variety of rice. In the present study, fifty advanced breeding lines along with parents i.e., MTU1010 NIL X Akshayadhan NIL, were screened for bacterial leaf blight disease, Thirty-four breeding lines were shown resistance against bacterial leaf blight disease.

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