Cell and Tissue Journal

Abstract Aim: in the present study, morphology and also histology of six Nepeta species were investigated.
Material and method: six species of the genus were collected from different parts of Iran. From each species, one population and from each populations three flowering stems were randomly elected. The mature intact leaf of each sample was fixed in FAA solution, and then transverse hand sections of them were double stained and examined under light microscopy. For scanning electron microscopy, a small part of leaves were coated with gold then, samples transferred to SEM for taking micrograph. The used software was SPSS.
Results: Thirteen glandular and non-glandular trichomes were observed in the studied species. The morphology and density of trichomes varied between species and ANOVA test showed significant differences in some trichome types between the studied species. The peltate and capitate were the most important glandular trichomes.  In addition, non- glandular hairs were existed in two forms: branched and non-branches. The branched ones were found in only one species.
Conclusion: on the basis of variations in glandular trichomes, it is expected that the amount of essential oil is variable between the studied species. In addition, the abilities of species are different in maintenance of essential oil. Moreover, the trichomes can use a good trait for improvement of Nepeta taxonomy.        
 

Abstract Aim: Hepatopancreas as a vital organ whose function changes during life, effects clearly on histological structure. Since there is no study about this matter this study has been done.
Material and Methods: In this study fifty healthy mature vannamei with the average length of 12±1 cm and weight of 18 ± 0.5 gr were caught from breeding farms. After adaptation, shrimps were kept in two aquavarium with same condition while one group was kept hungry for 5 days and another group (control group) was fed during the same time. Then 20 hepatopancreas from each group were taken and held in Davidson solution fixative. The routine procedures of preparation of tissues were followed and the cutted paraffin blocks were stained, and studied under light microscope.
Results: Microscopic findings, revealed kinds of M, E, B and R cells. The number of cells, size of lobules and the weight of hepatopancreas in non-hungry and hungry samples were measured and examined with statistical analysis. Results showed reduce in number and area of hepatopancreas tubules especially in resorptive cells than to other cells.
Conclusion: According to the findings, weight and area of hepatopancreas, size of cells and tubules in two groups was significance with statistical analysis.