Bioinformatics
Parisa Ramezanpoor; Hamid Najafi Zarini; Hamidreza Hashemi; Gholamali Ranjbar
Abstract
Zincfinger CCCH (C3HZNF) genes encode proteins with three cysteines and one histidine. The proteins of this family are an important group of zinc finger transcription factors that are effective in various activities such as plant growth and response to biotic and abiotic stresses and actually They are ...
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Zincfinger CCCH (C3HZNF) genes encode proteins with three cysteines and one histidine. The proteins of this family are an important group of zinc finger transcription factors that are effective in various activities such as plant growth and response to biotic and abiotic stresses and actually They are effective in stresses tolarance. In this article, C3HZNF protein data of Arabidopsis and rice plants were used to analyze phylogenetic relationships, exon/intron structure, motifs/domains organization. These studies showed the high homology of these genes with CCCH genes in rice. Analysis of the gene structure showed that AtC3Hs have a variable number of exons, but in general, genes with 1 and 7 exons contain the largest number. study the physical and chemical properties of this family showed that AtC3H36 is the most stable protein among the members of this family, and the highest isoelectric point belongs to the AtC3H7(9.96) protein. The observations showed that the members of this gene family have 1 to 6 Znf C3H domains and a total of 17 functional domains. Phylogeny comparison between C3H proteins in rice and Arabidopsis showed that these proteins are highly conserved. In the comparative phylogenetic analysis of AtC3H and OsC3H, the orthologous genes were placed in one group. For example, OsC3H8 showed close homology to HUA1 in Arabidopsis (AtC3H37), suggesting that this gene is involved in flower development. This study provides valuable information about the important CCCH zinc finger gene family in Arabidopsis and rice. This information can be helpful in understanding how these genes work to help plant tolarance when faced with biotic and abiotic stresses.
Molecular Plant Breeding
Morteza Oladi Ghadicolaei; Ghorban Ali Nematzadeh; Ali Ranjbar; Hamidreza Hashemi
Abstract
Marker-assisted selection (MAS), a selective method which is not influenced by environmental factors. The success of MAS-based breeding programs depends on the selection and validation of the markers used. In this study, to validate the gene(s) associated with salinity stress and evaluation of allelic ...
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Marker-assisted selection (MAS), a selective method which is not influenced by environmental factors. The success of MAS-based breeding programs depends on the selection and validation of the markers used. In this study, to validate the gene(s) associated with salinity stress and evaluation of allelic diversity of these markers in mutant rice lines, Band pattern of 18 SSR markers on a leaf sample of 14 mutant lines (M9) of rice, along with 2 susceptible controls (IR29 and Sepidrood) and 2 tolerant controls (Nonabokra and Dylmani) in 1398 in Genetics & Agricultural Biotechnology Institute of Tabarestan (GABIT). 11 primers were selected based on band pattern analysis in susceptible / tolerant cultivars. The molecular analysis results showed that OsMAPK4, OsCML11 and OsCPK17 had highest polymorphic information content (PIC). OsMAPK4 and OsCML11 had highest marker index (MI) at a rate of 0.23. The lowest PIC (0.05) and MI (0. 11) was accounted for OsCAX (D). Cluster analysis of molecular data, divided rice genotypes into three distinct groups. However, analysis of Biplot classified the genotypes into four different groups. In this study, 3 genes OsCML11, OsMAPK4 and OsCPK17 were identified on chromosomes 1, 6 and 7 respectively, as the most efficient primers in identifying the genetic diversity between the rice genotypes, considering that these primers have a very high linkage with salinity resistance genes, can be predicted that 3 lines G1 (M9-P1-7-2-1), G8 (M9-P3-21-1-1) and G9 (M9-P6 -7-1-1) have high tolerance to salinity stress.
Biotic and Abiotic stress
Samira Shakeri; Seyed kamal Kazemitabar; Seyed hamidreza Hashemi
Volume 4, Issue 8 , March 2015, , Pages 1-10
Abstract
Analysis of gene expression is considered as an essential part of functional genomics studies in all living organisms. Real-time PCR technique is very strong one to study the expression of a gene. However, despite its reliability, it has a set of specific problems, such as internal control gene selection ...
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Analysis of gene expression is considered as an essential part of functional genomics studies in all living organisms. Real-time PCR technique is very strong one to study the expression of a gene. However, despite its reliability, it has a set of specific problems, such as internal control gene selection which are suitable for normalization of the data. The study about selection reference of genes in sesame plant, at different developmental stages and under salinity stress of were studied. For this purpose, four internal control genes consists of eIF4- A, UBQ5, Alpha-Tubulin and Beta-Actin which are commonly used as housekeeping genes in plants, are selected and the stability of its expression in different salinity levels (zero and 75 mM) and different growth stages in five time periods (0 h, 6 h, 1 day, 4 days, 8 days and 16 days) in leaf tissue were examined. Study of the expression of reference genes using geNORM software showed that, in developmental stages and salinity in the leaf tissues, eIF4-A and Beta-Actin genes have more stable expression than other investigated genes. Using these genes can be useful in normalization of gene expression by Real-Time PCR analysis. The results can be used as reference genes for gene expression analysis in the Real-Time PCR.
Biotic and Abiotic stress
Seyyedeh farzaneh Fatemi ardestani; Ghorbanali Nematzadeh; Hossein Askari; Hamidreza Hashemi
Volume 4, Issue 6 , October 2014, , Pages 73-83
Abstract
Soil salinity limits crop production by creating osmotic stress and disruption of ion homeostasis, leads to damage at the molecular level and finally cell death. In this study, gene expression analysis based on cDNA-AFLP technique was used to compare the expression profiles of KCl stress at three levels: ...
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Soil salinity limits crop production by creating osmotic stress and disruption of ion homeostasis, leads to damage at the molecular level and finally cell death. In this study, gene expression analysis based on cDNA-AFLP technique was used to compare the expression profiles of KCl stress at three levels: 0 (control), 200mM and 400mM, in Aeluropus littoralis which is the closest family to cereal. Among 34 isolated ESTs, 27 ESTs were obtained with the average length of 280 bp. The nucleotide sequences were compared with those in the GenBank database. Approximately 80% of the ESTs show homology to nucleotide or amino acid sequences in the GenBank database and 6 ESTs show no significant similarity in the GenBank database which considered as novel genes. Finally, 27 ESTs were recorded in NCBI database which are included potassium transporter, ribosomal protein, NADH dehydrogenase and golgin. The result of this research is very important to understand molecular basis and resistance mechanisms of drought stress for breeding and genetic engineering to improve crop resistance against stress and the production of resistant plants. EST classification based on responses to stress, will facilitate performance analysis, characterization of responsive genes in plant roots of Aeluropus littoralis to stress in future studies on this herb that is a member of the Poaceae family.
Molecular Plant Breeding
Meysam Alizadeh; Ghorban Ali Nematzadeh; Mohammad Ali Ebrahimi; Hamidreza Hashemi
Volume 3, Issue 4 , September 2013, , Pages 53-60
Abstract
Rice is the main source of carbohydrates for more than a third of the world's population. It is also a principal food stuff for the Iranian people. In this study, AFLP markers were used to evaluate and fingerprint a number of rice (Oryza sativa L.) genotypes, including 28 Iranian local varieties and ...
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Rice is the main source of carbohydrates for more than a third of the world's population. It is also a principal food stuff for the Iranian people. In this study, AFLP markers were used to evaluate and fingerprint a number of rice (Oryza sativa L.) genotypes, including 28 Iranian local varieties and 19 exotic varieties. Using 10 primer combinations, 675 bands were obtained out of which 429 bands (63.5%) showed polymorphism. Among the used primers, E-TTG, M-CAT with107 bands and E-AGG, M-CTG with 34 bands had the highest and the lowest band numbers, respectively. Average polymorphism information content (PIC) was at 0.34. The best primer combination to differentiate rice samples were E-TTG , M-CAT with the marker index of 24.1. The average genetic similarity based on Nei coefficient, was estimated at 0.67 (0.97 to 0.40). The dendrogram obtained by using the UPGMA determined three main groups among the investigated varieties which was in concordance with the PCR analysis results.In conclusion, AFLP markers could provide unique fingerprinting patterns for all the studied varieties. The finding of this study could be used in inbreeding programs to produce hybrid and promising varieties based on the genetic distances and the identification of heterotic groups.
