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  • Author or Editor: R. Talebi x
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Three molecular markering techniques: inter-simple sequence repeat (ISSR); start codon targeted (SCoT), conserved DNA-derived polymorphism (CDDP) markers were compared for fingerprinting of 40 varieties of bread wheat. The number of scoreable and polymorphic bands produced using the ISSR, SCoT and CDDP primers for varieties was more than that of genotypes. Average polymorphism information content (PIC) for ISSR, SCoT and CDDP markers was 0.39, 0.41 and 0.34, respectively, and this revealed that three different marker types were equal for the assessment of diversity amongst genotypes. Cluster analysis for three different molecular types revealed that genotypes taken for the analysis can be divided in three and four distinct clusters. There were no significant differences among these markers in terms of the evaluation of genotypes. These results suggest that efficiency of SCoT, CDDP and ISSR markers was relatively the same in fingerprinting of genotypes but SCoT and CDDP analysis are more effective in fingerprinting of wheat genotypes. To our knowledge, this was the first detailed report of a comparison of performance among two targeted DNA region molecular markers (SCoT and CDDP) in comparision with ISSR technique on a set of samples of wheat cultivars. Overall, our results indicate that SCoT, ISSR and CDDP fingerprinting could be used to detect polymorphism for genotypes of wheat.

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A cogent medicinal and aromatic plant, Ziziphora clinopodioides (Lamiaceae) is a perennial herb, its aerial parts is used as a wild vegetable or additive in foods to proffer pleasant aroma and flavour. There are many discussions about the intraspecific classification of this species and several subspecies have been introduced for it in different flora. These subspecies are morphologically very similar and identification of them is very difficult and in some cases, impossible. Therefore, in the present study, the pollen grains morphology of nine subspecies (32 specimens) of Z. clinopodioides were probed and documented in details utilising the scanning electron microscopy (SEM). In total, eleven pollen morphological characteristics were investigated and analysed by PAST software. The obtained results showed that pollen grains were hexacolpate and their equatorial views were sub-oblate to prolate. The exine ornamentation types of the pollen grains are bireticulate, microreticulate, reticulate and bireticulate-reticulate. The ANOVA test did not show significant difference for the studied quantitative traits. Although, the results of the multivariate analysis revealed a high diversity amongst the specimens even in the specimens of a single subspecies; it did not confirm the separation of subspecies in Z. clinopodioides.

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Cefotaxime, a cephalosporin antibiotic, used to treat bacterial infections was investigated to label with 99mTc. Labeling was performed using sodium dithionite as a reducing agent at 100 °C for 10 min and radiochemical analysis involved ITLC and HPLC methods. The stability of labeled antibiotic was checked in the presence of human serum at 37 °C up to 24 h. The maximum radiolabeling yield was 92 ± 2%. Bacterial binding assay was performed with S. aureus and the in vivo distribution was studied in mice. Images showed minimal accumulation in non-target tissues, with an average target/non-target ratio of 2.89 ± 0.58.

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