scholarly journals The Resistance of Local Pigmented Rice Varieties against Bacterial Leaf Blight

2019 ◽  
Vol 23 (2) ◽  
pp. 205
Author(s):  
Tri Joko ◽  
Kristamtini Kristamtini ◽  
Sumarno Sumarno ◽  
Rofiq Andriyanto

Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae (Xoo) is an important disease in rice plants worldwide, including in Indonesia. The use of resistant variety against BLB is the best effort in disease control because it is considered as the most effective and environmentally friendly. This study aimed to evaluate the resistance of local varieties, red rice (cv. Sembada Merah) and black rice (cv. Sembada Hitam), against Xoo compared to white rice variety (Ciherang), commonly cultivated by the farmers. The study was conducted in a greenhouse and arranged in Factorial of Completely Randomized Design (CRD) with 5 replications and 2 treatment factors: variety (Sembada Hitam, Sembada Merah, and Ciherang) and inoculation (with and without inoculated by Xoo bacterial suspension). Xoo inoculation was performed by clipping the leaves that close to the reproductive phase when the heading begins to be produced. The disease intensity and Area Under Disease Progress Curve (AUDPC) over two weeks were used to determine the level of resistance of the tested plant varieties. The results showed that black rice and red rice had better levels of resistance against BLB compared to white rice. At two weeks after inoculation, Sembada Hitam had the lowest AUDPC value followed by Sembada Merah, while the Ciherang had the highest AUDPC value and was categorized as a susceptible variety to Xoo.

2011 ◽  
Vol 9 (2) ◽  
pp. 50-54
Author(s):  
FITRI SULISTYORINI ◽  
M.A.M. ANDRIANI ◽  
ROHULA UTAMI

Sulistyorini F, Andriani M, Utami R. 2008. The effect of various rice varieties to antimicrobial activity of red mould rice by Monascus purpureus. Biofarmasi 9: 50-54. This research had been done at Food and Nutrient Laboratory and Manipulated of Process Laboratory, Agriculture Product Technology Department, Agriculture Faculty, Sebelas Maret University in Surakarta, started from May until September 2008. The aim of this research was to determine the antimicrobial activity of red mould rice from white rice, red rice and black rice. This research used a factorial experiment that arranged in a Completely Randomized Design (CRD) factorial with two experimental factors. The first factor was three levels of rice variety, i.e. white rice (B1), red rice (B2) and black rice (B3). The second factor was fourth levels of extract concentrations, i.e. 2.5% (K1), 5.0% (K2), 7.5% (K3) and 10% (K4). The observation variables included colonies total of Pseudomonas aeruginosa and Escherichia coli, with a plate count method. The result of this research showed that the interaction of rice variety of red mould rice and the extract concentration effected to Pseudomonas aeruginosa and not effected to Escherichia coli. The extract of red mould rice from black rice with 10% concentration extract, had the highest antimicrobial activity to Pseudomonas aeruginosa. The conclusion of this research was red mould rice had an antimicrobial activity. Red mould rice from black rice had an antimicrobial activity higher than red mould rice from red rice and red mould rice from white rice.


2021 ◽  
Vol 905 (1) ◽  
pp. 012068
Author(s):  
Hadiwiyono ◽  
S H Poromarto ◽  
S Widono ◽  
R F Rizal

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.


2016 ◽  
Vol 20 (2) ◽  
pp. 65 ◽  
Author(s):  
Dini Yuliani ◽  
Rina H. Wening ◽  
NFN Sudir

<p>Seleksi Ketahanan Aksesi Plasma Nutfah Padi terhadap Hawar Daun Bakteri. Dini Yuliani, Rina H. Wening, dan Sudir. Usaha budi daya tanaman padi di Indonesia selalu dihadapkan pada berbagai kendala, di antaranya serangan penyakit hawar daun bakteri (HDB) yang disebabkan oleh bakteri Xanthomonas oryzae pv. oryzae (Xoo). Pengendalian penyakit HDB dengan varietas tahan merupakan salah satu teknik yang murah dan mudah dilakukan oleh petani padi. Aksesi plasma nutfah sebagai sumber tetua untuk perakitan varietas tahan perlu diketahui reaksi ketahanannya terhadap penyakit HDB. Penelitian ini bertujuan untuk menyeleksi ketahanan aksesi plasma nutfah terhadap penyakit HDB patotipe III, IV, dan VIII. Penelitian dilaksanakan di Kebun Percobaan Balai Besar Penelitian Tanaman Padi di Sukamandi, Subang, Jawa Barat pada Musim Hujan 2012/2013 dan Musim Kemarau 2013 dengan Rancangan Acak Terpisah. Petak utama adalah tiga patotipe Xoo, yaitu patotipe III, IV, dan VIII. Sedangkan anak petak adalah materi yang diuji, yaitu 20 aksesi plasma nutfah dan tiga varietas pembanding. Sebanyak 20 rumpun tanaman per petak diinokulasi Xoo dengan metode pengguntingan. Inokulasi dilakukan pada saat pertanaman menjelang stadium primordia. Ujung-ujung daun digunting sepanjang kira-kira 10 cm dari ujung daun dengan gunting inokulasi yang berisi suspensi bakteri Xoo umur 48 jam dengan kepekatan 108 cfu. Pengamatan keparahan penyakit HDB dilakukan dengan mengukur panjang gejala terpanjang pada umur dua, tiga, dan empat minggu setelah inokulasi. Hasil pengujian ketahanan terhadap HDB patotipe III, IV, dan VIII diperoleh tiga aksesi plasma nutfah yang berasal dari galur isogenik menunjukkan keparahan penyakit HDB tidak berbeda nyata dengan varietas pembanding tahan Angke pada dua musim tanam. Galur isogenik tersebut, yaitu IRBB 55, IRBB 60, dan IRBB 61. Ketiga galur isogenik tersebut dapat dijadikan tetua tahan dalam perakitan varietas unggul baru tahan HDB.</p><p> </p><p><strong>Abstrak</strong></p><p>Rice cultivation in Indonesia has been faced with many obstacles, including the attack of bacterial leaf blight (BLB) that caused by bacteria Xanthomonas oryzae pv. oryzae (Xoo). Resistant variety was considered as the cheap technique to control BLB disease and could be used by rice farmers. Germplasm accessions as a source to build resistant varieties must be known their resistance to BLB disease. This study aimed at selecting the resistance germplasm accessions to BLB pathotype III, IV, and VIII. The study was conducted at the Experimental Station of the Indonesian Center for Rice Research in Sukamandi, Subang, West Java at wet season 2012/2013 and dry season 2013 with Split Plot Design. The main plot was three pathotypes Xoo i.e. pathotype III, IV, and VIII. The subplot was 20 germplasm accessions and three check varieties. A total of 20 hills of rice plants per plot were inoculated by Xoo with cutting method. Inoculation was conducted before the primordia stage. Inoculation of bacterial suspension containing Xoo aged 48 hours at a concentration of 108 cfu. Observations BLB disease severity was done by measuring the longest length of symptoms at the age of two, three, and four weeks after inoculation (WAI). The result showed that three germplasm accessions from near isogenic lines were not significantly different with the check varieties (Angke) in their resistance to Xoo pathotype III, IV, and VIII in two cropping seasons. The isogenic lines were IRBB 55, IRBB 60, and IRBB 61 can be used in the assembly of resistant new varieties to BLB.</p>


2020 ◽  
Vol 39 (1) ◽  
pp. 11
Author(s):  
Fatimah Fatimah ◽  
Joko Prasetiyono

<p>Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv oryzae (Xoo) is an important bacterial disease and very destructive to rice plant. BLB decreased rice production from 20%-30% up to 80%. Host-plant resistance is a cost-effective and environmentally safe approach to reduce yield loss. However the development of new rice variety by conventional selection would take several years. The genetic improvement in rice production considered as a vital program in order to ensure national food security. The availability of corresponding molecular marker makes it more precision and efficient by reducing the time required for selection. This present article highlights the molecular approach in breeding for BLB disease resistant rice varieties. In detail, it will be discussed the application of molecular marker assisted backcrossing and pyramiding gene resistance offered breeders to accelerate the rice breeding program for resistance to BLB. The pyramiding of three resistance BLB genes (xa5, Xa7, and Xa21and one gene (Xa4) as a background into two elite indica rice varieties, Ciherang and Inpari 13, was introduced successfully. The combining of conventional breeding, marker assisted backcrossing, disease evaluation, agronomic performance and yield has led the significant resistance of pyramid lines to Xoo Race III, IV and VIII in vegetative and generative phase while their yield potential was maintained (6-7 ton/ha). The current status of Ciherang-HDB and Inpari 13-HDB pyramid lines is the production of nucleoseeds and breeder seeds. This broad spectrum and durable resistance characteristic may help in controlling BLB disease in different region of Indonesia and it will facilitate the rice self-sustainability program.</p><p>Keywords: Rice, gene pyramiding, plant breeding, molecular marker.</p><p> </p><p><strong>Abstrak</strong></p><p>Penyakit hawar daun bakteri (HDB) yang disebabkan oleh Xanthomonas oryzae pv oryzae (Xoo) merupakan penyakit penting pada tanaman padi karena dapat menurunkan produksi padi rata-rata 20-30% bahkan dapat mencapai 80%. Penggunaan varietas tahan merupakan cara pengendalian yang paling efektif, ramah lingkungan, dan mudah dilakukan. Namun pengembangan varietas unggul baru melalui seleksi konvensional memerlukan waktu lebih lama. Perbaikan varietas padi perlu terus dikembangkan dalam mendukung ketahanan pangan dan kemandirian pangan nasional. Tersedianya marka molekuler membantu proses pemuliaan tanaman menjadi lebih presisi dan lebih efisien sehingga mengurangi waktu seleksi pada tanaman progeni. Tulisan ini memfokuskan pendekatan molekuler dalam pemuliaan varietas tahan penyakit HDB melalui piramida gen ketahanan untuk mempercepat progam pemuliaan padi tahan penyakit HDB. Kegiatan menggabungkan tiga gen ketahanan (xa5, Xa7, dan Xa21) dan satu gen (Xa4) sebagai background ke dalam padi varietas Ciherang dan Inpari-13 telah berhasil dilakukan. Melalui penggabungan beberapa pendekatan yaitu pemuliaan konvensional dan silang balik berbantu marka, evaluasi penyakit dan keragaan agronomi serta komponen hasil telah menunjukkan peningkatan ketahanan yang nyata pada galur-galur piramida Ciherang HDB dan Inpari-13 HDB pada tiga ras Xoo (Ras III, IV, dan VIII), baik pada fase vegetatif maupun generatif dengan potensi hasil tidak berbeda nyata dengan tetuanya (6-7 t/ha). Saat ini sudah diproduksi benih inti (NS) dan benih penjenis (BS) galur-galur piramida Ciherang HDB dan Inpari-13 HDB. Dengan demikian, galur-galur piramida memiliki spektrum yang luas dan mampu bertahan dalam jangka waktu lama sehingga dapat mengontrol penyakit HDB di berbagai wilayah Indonesia dan mendukung target pemerintah untuk mempertahankan swasembada beras secara berkelanjutan.</p><p>Kata kunci: Padi, piramida gen, pemuliaan tanaman, marka molekuler.<br /><br /></p><p> </p>


PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0255470
Author(s):  
Phuong Nguyen Duy ◽  
Dai Tran Lan ◽  
Hang Pham Thu ◽  
Huong Phung Thi Thu ◽  
Ha Nguyen Thanh ◽  
...  

TBR225 is one of the most popular commercial rice varieties in Northern Vietnam. However, this variety is highly susceptible to bacterial leaf blight (BLB), a disease caused by Xanthomonas oryzae pv. oryzae (Xoo) which can lead to important yield losses. OsSWEET14 belongs to the SWEET gene family that encodes sugar transporters. Together with other Clade III members, it behaves as a susceptibility (S) gene whose induction by Asian Xoo Transcription-Activator-Like Effectors (TALEs) is absolutely necessary for disease. In this study, we sought to introduce BLB resistance in the TBR225 elite variety. First, two Vietnamese Xoo strains were shown to up-regulate OsSWEET14 upon TBR225 infection. To investigate if this induction is connected with disease susceptibility, nine TBR225 mutant lines with mutations in the AvrXa7, PthXo3 or TalF TALEs DNA target sequences of the OsSWEET14 promoter were obtained using the CRISPR/Cas9 editing system. Genotyping analysis of T0 and T1 individuals showed that mutations were stably inherited. None of the examined agronomic traits of three transgene-free T2 edited lines were significantly different from those of wild-type TBR225. Importantly, one of these T2 lines, harboring the largest homozygous 6-bp deletion, displayed decreased OsSWEET14 expression as well as a significantly reduced susceptibility to a Vietnamese Xoo strains and complete resistance to another one. Our findings indicate that CRISPR/Cas9 editing conferred an improved BLB resistance to a Vietnamese commercial elite rice variety.


2009 ◽  
Vol 9 (2) ◽  
pp. 168-173
Author(s):  
Heru Adi Djatmiko ◽  
Fatichin Fatichin

Resistance of twentyone rice varieties to Bacterial Leaf Blight.  Bacterial leaf blight is one of the most important diseases of rice plants.  Resistant Variety is one of safe, effective, and environment friendly alternative controls to suppress the bacterial leaf blight on rice.  The objectives of this research were to find the most resistant varieties against bacterial leaf blight, and to study the yield of inoculated rice varieties. The research was carried out experimentally. This experiment was arranged in Randomized completely block design with 22 treatments and three replicates. Varieties of IR64 as control for susceptible varieties. Observed Variables were incubation period, disease intensity, seed weight per panicle, and seed weight per hills.  The result of this research showed that variety IR 70 was the most resistant variety to bacterial leaf blight. Variety having highest yield was Rojolele with seed weight per hill was 31.17 g.


2014 ◽  
Vol 2 (3) ◽  
pp. 229-237 ◽  
Author(s):  
Manu Maya Magar ◽  
Ch.V. Durga Rani ◽  
G Auradha

The present investigation was undertaken with the objective to develop high yielding, fine grain rice varieties possessing broad spectrum durable resistance by transferring bacterial leaf blight (BLB) resistant genes viz., xa13 and Xa21 from B95-1. A popular high yielding and fine grain rice variety, MTU1010 (Cottondora Sannalu), susceptible to BLB and B95-1 carrying resistant genes for BLB (xa13 & Xa21 genes) was selected as the parent for crossing. B95-1 was verified for the presence of target genes by using gene linked primers viz., xa13 promotor and pTA 248. These primers were also used to study polymorphism between resistant (B95-1) and susceptible (MTU1010) parents. The cross viz., MTU1010 x B95-1 was affected during Rabi, 2010 and F1 progenies were confirmed during Kharif, 2011. The F1 plants confirmed as true hybrids for both the genes were advanced to F2 generation and foreground selection was done using gene linked markers. Genetic analysis in F2 populations confirmed that the genes (xa13 & Xa21) governing BLB resistance followed Mendelian inheritance. The phenotypic data analysis revealed that the plants carrying two resistance gene combinations (xa13xa13 Xa21Xa21, xa13xa13Xa21xa21) showed BLB resistance (0-2 scale), while the gene combinations viz., Xa13Xa13Xa21Xa21, Xa13Xa13Xa21xa21, and Xa13xa13Xa21Xa21, Xa13xa13Xa21xa21 showed BLB resistance (0.5-3.0).DOI: http://dx.doi.org/10.3126/ijasbt.v2i3.10570 Int J Appl Sci Biotechnol, Vol. 2(3): 229-237   


2020 ◽  
Vol 110 (2) ◽  
pp. 267-277
Author(s):  
C. Tekete ◽  
S. Cunnac ◽  
H. Doucouré ◽  
M. Dembele ◽  
I. Keita ◽  
...  

Bacterial leaf blight caused by Xanthomonas oryzae pv. oryzae represents a severe threat to rice cultivation in Mali. Characterizing the pathotypic diversity of bacterial populations is key to the management of pathogen-resistant varieties. Forty-one X. oryzae pv. oryzae isolates were collected between 2010 and 2013 in the major rice growing regions in Mali. All isolates were virulent on the susceptible rice variety Azucena; evaluation of the isolates on 12 near isogenic rice lines, each carrying a single resistance gene, identified six new races (A4 to A9) and confirmed race A3 that was previously reported in Mali. Races A5 and A6, isolated in Office du Niger and Sélingué, were the most prevalent races in Mali. Race A9 was the most virulent, circumventing all of the resistance genes tested. Xa3 controlled six of seven races (i.e., 89% of the isolates tested). The expansion of race A9 represents a major risk to rice cultivation and highlights the urgent need to identify a local source of resistance. We selected 14 isolates of X. oryzae pv. oryzae representative of the most prevalent races to evaluate 29 rice varieties grown by farmers in Mali. Six isolates showed a high level of resistance to X. oryzae pv. oryzae and were then screened with a larger collection of isolates. Based on the interactions among the six varieties and the X. oryzae pv. oryzae isolates, we characterized eight different pathotypes (P1 to P8). Two rice varieties, SK20-28 and Gigante, effectively controlled all of the isolates tested. The low association observed among races and pathotypes of X. oryzae pv. oryzae suggests that the resistance observed in the local rice varieties does not simply rely on single known Xa genes. X. oryzae pv. oryzae is pathogenically and geographically diverse. Both the races of X. oryzae pv. oryzae characterized in this study and the identification of sources of resistance in local rice varieties provide useful information to inform the design of effective breeding programs for resistance to bacterial leaf blight in Mali.


2018 ◽  
Vol 24 (2) ◽  
pp. 125
Author(s):  
Kristina Dwiatmini ◽  
Higa Afza

<p>Local varieties of pigmented rice are highly valuable genetic resources as a functional food in the future. Pigmented rice contains anthocyanins which function as nutrient bioactive components, called antioxidants. The aim of this research was to characterize anthocyanin content on 27 accessions of pigmented local rice, 2 varieties of released red rice varieties (Aek Sibundong and Inpari<br />24), and 1 control varieties of white rice, Ciherang. The content of anthocyanin was analyzed by using High Performance Liquid Chromatography (HPLC) with cyanidin-3-glucoside as a standard. The results showed that local rice Aen Metan and Melik had the highest anthocyanin content were reached 0.7953 mg/g and 0.7806 mg/g. These content were higher than 2 released red rice varieties, Aek Sibundong and Inpari 24 which had anthocyanin content reached 0.6496 mg/g and 0.4423 mg/g, respectively. Aen Metan and Melik were local black rice varieties and frequently have used as a parent in the breeding program. The white rice as control, Ciherang was showed the lowest anthocyanin content. Four pigmented local rice, Baliman Putih, Sari Kuning, Karamanting, and Iden had higher anthocyanin content than the two released red rice breeding varieties.</p>


2017 ◽  
Vol 36 (2) ◽  
pp. 91 ◽  
Author(s):  
Buang Abdullah

<p>improving nutritional status of human health. Rice as a staple food for Indonesian community is potential to be increased its nutritional content to produce rice with high vitamin, mineral and/or antioxidant (anthocyanin) which is benefit for human health. Anthocyanin is a compound that produced by plants. Biofortification of rice for high content of anthocyanin was carried out through development of red and black rice through conventional breeding. Bio-fortification is more effective than fortification to combat generative diseases. Two red improved rice varieties were released with high anthocyanin content were released by IAARD, namely Inpari 24 Gabusan as a red rice variety with anthocyanin content of 8 ug/100g and Inpari 25 Opak Jaya as a waxy red rice variety with anthocyanin content of 11 ug/100g. Red rice varieties produced from biofortification are rapidly adopted by farmers and stake-holders. Several number of red and black rice advanced lines having higher anthocyanin content are being tested in the field for their yield trial. These lines could be released as red and black rice varieties that better than the existing varieties. In order to overcome degenerative diseases such as cancer, diabetes, and high blood consuming functional food from bio-fortification would be more efficient than that from fortification, because the important compound which added through bio-fortification is derivative and eternal.</p><p>Keywords: Red and black rice, anthocyanin, bio-fortification</p><p> </p><p><strong>Abstrak</strong></p><p>Biofortifikasi adalah paradigma baru di dunia pertanian dan merupakan salah satu pendekatan dalam meningkatkan gizi masyarakat. Beras yang merupakan makanan pokok di Indonesia dapat ditingkatkan kandungan gizinya melalui program pemuliaan tanaman guna menghasilkan varietas padi yang berasnya mengandung vitamin, mineral, dan/atau senyawa lain seperti antosianin yang bermanfaat bagi kesehatan. Antosianin dapat dihasilkan oleh tanaman secara alami. Biofortifikasi beras yang mengandung antosianin tinggi telah dilakukan melalui program perakitan varietas padi beras merah dan beras hitam dengan prosedur pemuliaan konvensional. Dua varietas unggul padi fungsional yang mengandung antosianin tinggi telah dilepas yaitu Inpari-24 Gabusan sebagai varietas unggul padi beras merah dengan kandungan antosianin 8 ug/100g dan Inpari-25 Opak Jaya sebagai varietas ketan merah dengan kandungan antosianin 11 ug/100g. Varietas unggul padi beras merah hasil biofortikasi telah berkembang luas di beberapa daerah karena disukai konsumen dan menguntungkan petani. Beberapa galur harapan padi beras merah dan beras hitam yang mengandung antosianin lebih tinggi masih dalam tahap pengujian daya hasil dan multilokasi. Beberapa di antara galur tersebut diharapkan dapat dilepas sebagai varietas unggul padi beras merah dan beras hitam yang lebih baik dari varietas yang sudah ada. Untuk mengatasi penyakit degeneratif seperti kanker, diabetes, dan hipertensi, dengan mengonsumsi pangan fungsional hasil biofortikasi lebih efisien dan lebih efektif dibandingkan dengan pangan hasil fortifikasi karena senyawa penting yang ditambahkan melalui biofortifikasi bersifat diwariskan dan langgeng. Kata kunci: Padi, beras merah, beras hitam, antosianin, biofortifikasi</p>


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