COMPOSITION AND DISTRIBUTION OF Xanthomonas oryzae pv. oryzae PATHOTYPES, THE PATHOGEN OF RICE BACTERIAL LEAF BLIGHT IN INDONESIA

Abstract

This research aimed to determine the composition and pathotype distribution of Xanthomonas oryzae pv. oryzae (Xoo) in several rice producing centers in Indonesia during the growing season of 2010-2013. The studies were conducted into three phases of activities, namely: sampling and collection of infected leaves from the representative rice growing areas; isolation and purification of the Xoo isolates; and evaluation of composition and pathotype of Xoo on five rice differential varieties. Results indicated that a total of 2,658 isolates Xoo have been isolated from 10 provinces representing rice ecosystem in Indonesia during the growing season from 2010-2013. Evaluating these Xoo isolates against five differential varieties revealed that these Xoo isolates consisted of three pathotypes III, IV, and VIII with a total of 30, 36, and 34%, respectively. The data also indicated that two pathotypes III and IV were dominant in three provinces, while the pathotype VIII was dominant in four provinces. As mentioned previously, such information are useful in designing strategy of integrating components of technologies combined in the management of Bacterial leaf blight (BLB) occurrences in a particular endemic areas.

Antimicrobial Activity of <i>Tithonia diversifolia</i>, <i>Elephantopus scaber</i>, and <i>Kigelia africana</i> Against Plant Pathogens

“…Rhizoctonia solani and Phytophthora nicotianae are adverse fungal plant pathogen that rapidly growth and infect valuable crops in Indonesia [12,13] In addition, two of important bacterial disease caused by Ralstonia solanacearum and Xanthomonas oryzae are dangerous plant pathogens on several common crops cultivated in Indonesia [14,15]. Several control techniques have been tested and enforced to obtain the best composition of disease management.…”

HERITABILITAS, SUMBER GEN, DAN DURABILITAS KETAHANAN VARIETAS PADI TERHADAP PENYAKIT HAWAR DAUN BAKTERI/ Heritability, Gene Resource, and Durability of Rice Varieties Resistance To Bacterial Leaf Blight Disease

“…Patotipe IV dominan di Sumatera Utara, Lampung, dan Nusa Tenggara Barat. Patotipe VIII dominan di Jawa Barat, Banten, Jawa Tengah, dan Jawa Timur (Sudir dan Yuliani 2016). Menurut Suparyono et al (2004), dominasi patotipe IV dan VIII mengindikasikan penyakit HDB masih menjadi ancaman produksi padi di Indonesia sejak sebagian besar varietas padi yang berkembang di petani bereaksi rentan terhadap dua patotipe tersebut.…”

“…Varietas tahan HDB patotipe IV di antaranya Ciujung, Conde, Angke, Inpari 1, Inpari 6, dan Inpari 17. Varietas tahan yang dianjurkan ditanam pada daerah endemis HDB patotipe VIII adalah Conde, Angke, Inpari 1, Inpari 4, Inpari 6, Inpari 17, dan Cimelati (Sudir dan Yuliani 2016).…”

Komposisi Dan Dominasi Patotipe Xanthomonas oryzae pv. oryzae Penyebab Hawar Daun Bakteri Pada Tanaman Padi Dengan Pola Tanam Tidak Serempak

“…dan Sudir (2011) melaporkan bahwa di sentra produksi padi di Pulau Jawa telah teridentifikasi tiga kelompok patotipe Xoo utama, yaitu patotipe III, IV, dan VIII. Penelitian penyebaran komposisi dan dominasi patotipe Xoo telah dilakukan di 10 provinsi sentra produksi padi di Indonesia (Sudir dan Yuliani 2016). Penelitian lainnya juga mengisyaratkan dominasi dan distribusi patotipe yang berbeda di berbagai daerah dapat berubah dalam kurun waktu tertentu (Suparyono dan Sudir 1992, Ogawa 1993.…”