جستجوی مقالات مرتبط با کلیدواژه "flor" در نشریات گروه "زیست شناسی"

Lichens are symbiotic organisms from the community of a fungal part and an algal part. In this research, after taking samples from Pashmin mountains area of Malekshahi city of Ilam province, using tools such as magnifying glass, gardening shears, masonry pen, saw and some other tools, the samples were prepared for the next steps. To identify lichens, in addition to using different identification keys, chemical tests, thin layer chromatography (TLC) test and histological examination have also been used. In chemical tests, K, C, KC and PD tests have been performed. To investigate the histological structure of lichens, by performing different laboratory steps and using different compounds such as FAA solution, alcohol, combining alcohol with toluene, after fixing the samples in paraffin and molding, cutting the samples using a facial microtome. and after going through some steps, the final stabilization and preparation of images using a microscope has been done. After examining the study area, conducting sampling and various laboratory steps, and also using different identification keys, 27 species from 7 lichen families have been identified and introduced, of which 5 species have been identified for the first time in Ilam province. It has been reported. In these 7 families, Physciaceae, Megasporaceae and Acarasporaceae families have the most abundance in the lichen flora of the study area.

The purpose in this research to investigate two species Pteris by anatomy method and evaluation of similarities and differences between them in the forests of northern Iran. Therefore, the populations of two species of the Pteris cretica and Pteris dentate were collected from forests of Mazandaran, Guilan and Golestan. The results of the findings show that these two species of ferns , based on the anatomy of the main components I, II and IV are different from each other , but based on other main components aren’t significantly different from each other. Also, the dentate species populations based on principal component except the sixth, no significant differences were observed, and that could indicate the presence of more than one sub- species of the dentate in northern Iran.The results show that two species of ferns, in terms of anatomy based on principal component first, second and fourth different together, but the other main components do not differ significantly. Also among the populations of Dntata based on principal component except the sixth, there was a significant difference that could indicate the presence of more than one subspecies of Dntata northern Iran.