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Isolation and Characterization of OsNAC6 cDNA from Rice (Oryza sativa L.) cv. Nipponbare, Batutegi, and Rojolele Rachmat, Agus; Nugroho, Satya; Nurdiani, Dini; Swastika, Maria; Sukma, Dewi; Aswidinnoor, Hajrial; Sudarsono, Sudarsono
ANNALES BOGORIENSES Vol 18, No 2 (2014): Annales Bogorienses
Publisher : Research Center for Biotechnology - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1372.433 KB) | DOI: 10.1234/100

Abstract

Transcription factors have an important function in regulating gene expression and plant responses to stresses. The ERF, bZIP, WRKY, MYB, and NAC are stress inducible transcription factors. The OsNAC6 is a member of the NAC transcription factor family in rice and its expression is induced by abiotic stresses, wounding and blast disease. Characterization of OsNAC6 gene sequences would give a better undersanding on how OsNAC gene functions biologically. The objectives of this research are to isolate the OsNAC6 cDNA from Nipponbare, Batutegi, and Rojolele cultivars, to characterize their DNA sequences, and to compare their sequences to other NAC genes from other plants available in GenBank DNA databases. Isolated cDNA and sequencing of the fragments resulted in a 912 bp DNA sequences. Translation of the sequences yielded a protein consisted of 303 amino acid residue. Blast analysis of amino acid sequences indicated identity of isolated cDNA from three Indonesian rice cultivars are the OsNAC6 gene. Deduced amino acid residues from amplified cDNAs of Nipponbare, Batutegi, and Rojolele cultivars shared 100% sequence identities to rice OsNAC6 (Acc. # BAA89800), 71-100% sequence identity to a number of OsNAC protein from Oryza sativa and 63-83% sequence identity to NAC protein from other plants.
Characterization of Acid-Aluminium Sensitive Mutants of Soybean Symbiont Bradyrhizobium japonicum Generated by Transposon Mutagenesis ARIS TRI WAHYUDI; ANDINI PURNAWIJAYA; DINI NURDIANI; TEDJA IMAS
Microbiology Indonesia Vol. 1 No. 2 (2007): August 2007
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (61.648 KB) | DOI: 10.5454/mi.1.2.7

Abstract

Acid-aluminium sensitive mutants of symbiotic bacterium Bradyrhizobium japonicum BJ11 (designated as AAS11) and KDR15 (designated as AAS15) were constructed by mini-Tn5 transposon mutagenesis to study genes involved in acid-aluminium tolerance (AAT) in B. japonicum. Transposon delivery was carried out through conjugation between B. japonicum strains as recipients and Escherichia coli S17-1 (ë pir) carrying pUTmini- Tn5Km1 as a donor strain. The result showed that frequency of transconjugation was in the range of 6.7 x 10-7 to 7.1 x 10-6 cell per recipients. AAS11 and AAS15 mutants did not grow on Ayanaba media (pH 4.5) containing 50 μM Aluminium. These mutants remained able to form root nodules of Siratro (Macroptilium arthropurpureum) plants revealing genes interrupted by transposon which were responsible for acid-Al tolerance did not correlate with the nodulation genes. Strains tolerant to acid-aluminium and their mutants with a wild type sensitive to acidaluminium were characterized by accumulating phosphate and aluminium absorption. Compared to the wild type acid-aluminium tolerant B. japonicum, there was approximately a three- to eight-times decrease in phosphate accumulation and a five- to seven-times increase in aluminium absorption by these mutants. These results suggest that aluminium and phosphate contents in the bacterial cells may be involved in mechanisms of acid-Al tolerance of B. japonicum grown in acid-aluminium stress conditions.
Co-Authors Agus Rachmat ANDINI PURNAWIJAYA Aris Tri Wahyudi Dewi Sukma HAJRIAL ASWIDINNOOR Satya Nugroho Sudarsono Swastika, Maria TEDJA IMAS