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All Journal Jurnal AgroBiogen Makara Journal of Science
Triny S. Kadir
Balai Besar Penelitian Tanaman Padi, Jl. Raya 9, Sukamandi-Subang 41256
Agriculture, Biological Sciences & Forestry

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AvrBs3/PthA Virulence Factor of Bacterial Leaf Blight Race III, Race IV, Race VIII, and IXO93-068 Utami, Dwinita W.; Kadir, Triny S.; Yuriyah, Siti
Jurnal AgroBiogen Vol 7, No 1 (2011): Jurnal AgroBiogen
Publisher : Jurnal AgroBiogen

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Bacterial leaf blight (BLB) is an important disease of rice and present throughout many of the rice-growing regions in the world, also in Indonesia. Xanthomonas oryzae pv. oryzae (Xoo) is the causal agent and a member of the Protebacteria and like many other this phyllum have a type III secretion system for protein virulence effector (PVE) released on their patho-genicity system. Commonly, PVE in Xanthomonas sp., is coded by AvrBs3/PthA family gene. This research was coducted to identify the virulence factor of AvrBs3/PthA on dominant Indonesian BLB isolates (Race III, Race IV, Ras VIII, and IXO93-068). This objective was obtained by sequence analysis through designed markers for members of the virulence factor AvrBs3/PthA gene family (PthXo4, avrXa7#38, PthXoS and avrXa7sacB50). Results gave infor-mation that RaceIII is a dependent elicitor race due to no PVE transcript formed and intraceluler protein target with RLL type on NLS (nuclear localization signal). RaceIV and RaceVIII are the virulent race which PVE active formed with intraceluler protein target and have the RLL and RLLP type for the NLS signal. While isolate IXO93-068 is a virulen isolate that active formed a PVE but the extraceluler protein target is due to no type of NLS. Based on cluster analysis, Race VIII has a genetic distance closely to PthXoS and avrXa7sacB50.
EVALUATION OF DISEASE SEVERITY ON RICE GENOTYPES TO BACTERIAL BLIGHT USING AMINO ACID CONTENT ANALYSIS Suryadi, Yadi; Kadir, Triny S.; Daradjat, Aan Andang
Makara Journal of Science Vol. 15, No. 1
Publisher : UI Scholars Hub

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The bacterial blight (BB) disease severity on two rice genotypes i.e.; BP 4110-2d-33 (backcross between Ciherang x Angke; containing Xa-4, xa-5) and BP 3688e-23 (sister lines derived from cingri/memberamo//widas///IRBB 8; containing xa-8) were lower compare with TN-1 (containing Xa-14). The total amino acid content in cultivar’s TN-1 was accounted for about one third to about a half of total amino acid than those of other rice genotypes where the total amino acid was ranging from 1.95% to 4.22%. In BP 3688e-23, and BP 3688e-22 genotypes more amino acid levels were decline although these advance lines showing xa-8 background. BB resistant gene carried by BP 4110-2d-33 and BP 3688e-23 were stable, whilst BP 3688e-22 was less effective to inhibit BB disease severity. Overall, amino acids were not found to be related to the level of BB resistance; where correlation between amino acid content and BB disease severity is not significant. The slower growth of Xoo on rice genotypes BP 4110-2d-33 and BP 3688e-23 may probably due to other than nutritional factors. The degree of resistance in rice genotypes infected by races of pathogen; as well as the resistance gene possessed by genotype BP 3688e-23 need to be further determined.
Co-Authors Daradjat, Aan Andang Dwinita W. Utami Siti Yuriyah Yadi Suryadi