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Assiyeh Hamidipour MSc

PhD thesis: Structure and function in glandular cells in Pinguicula

Research activities

Bachelor thesis (Shahed University, Tehran, IRAN):

Leaf anatomical investigation of Cupressaceae and Taxaceae in Iran

Anatomical and morphological investigations of seven species of Iranian representatives of gymnosperms belonging to Taxaceae and Cupressaceae are performed in my thesis. Anatomical structure of leaves/scales in different species of Iranian representatives of gymnosperms has a taxonomic value and helps us to identify the plants of even closely related species. Outlines of transverse sections, presence or absences of fibers, cuticular ornaments and resin ducts have a taxonomic value. Moreover, form and type of spongy parenchyma, the number of vascular bundles and existence of sclerenchymatous tissues in vascular bundles are also important. These anatomical characters show possible ecological adaptations to various climates.


Master Thesis (Tehran University, Tehran, IRAN):

Comparison of alkaloids and proteins in different organs of some species of genus Colchicum

Colchicum L. is a monocot geophyte with an uncommon life cycle. Its life cycle containing of two growing phases: autumnal period followed by winter season and photosynthetically active period being expected to result in senescence and latency. After the starch, protein content characterized as the second vital storage compound in corms. Soluble and insoluble protein contents of the seed, corms and vegetative organs of two spring- flowering species of Colchicum (C. crocifolium Boiss., C. varians Freyn & Bornm) and autumn- flowering species of Colchicum (C. kotschyi Boiss) were studied in both quantity and quality aspects in my thesis.
The main substrates for colchicines’s biosynthesis are dopamine and cinnamic acid. The polyphenol oxidase is expected to participate in dopamine formation from tyrosine. I was interested in the comparative study on some antioxidant enzyme activities in different organs the mentioned species.
Colchicine, the main bioactive alkaloid of genus Colchicum, has been used clinically for the treatment of acute gouty arthritis, cirrhosis, certain forms of leukemia, familial mediterranean fever. This component has an important biological characteristic such as microtubules assembling, while it has too low intrinsic fluorescence intensity. Fluorescence spectroscopy is an influential tool for the study of the reactivity of chemical and biological systems since it allocate non-intrusive measurements of substances in low concentration under physiological states. In order to enhance Colchicine intrinsic fluorescence intensity, its interaction with some metal ions has been investigated by fluorescence spectroscopy in my thesis. Also Colchicine concentrations of the seeds, corms and vegetative organs of our species were determined by means of fluorescence spectroscopy as well.


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Lastupdate: 17.11.2017 - 13:25