Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   WINTER 2008 , Volume 17 , Number 66/1 (BIOLOGY ISSUE); Page(s) 51 To 61.
 
Paper: 

COMPARISION OF THE TROPANE ALKALOID CONTENT OF HYOSCYAMUS ARACHNOIDEUS POJARK AND HYOSCYAMUS RETICULATUS L. SPECIES DURING DIFFERENT GROWTH STAGES

 
 
Author(s):  KHAVARINEZHAD RAMEZAN ALI*, DILMAGHANI K.A.D., FAHIMI H., HEKMAT SHOAR H.
 
* DEPARTMENT OF BIOLOGY, SCIENCE AND RESEARCHES BRANCH, ISLAMIC AZAD UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Hyoscyamus plants (Solanaceae) are tropane alkaloids producers. For investigation of tropane alkaloids levels within two Hyoscyamus species, H. arachnoideus Pojark and H. reticulatusL., plant samples were collected from natural habitats at three regions. Collection of plants was performed during vegetative, flowering and fruiting stages. After extraction and purification of alkaloids from different parts of the plants, levels of two tropane alkaloids, hyoseymine and scopolamine, were measured by high performance liquid chromatography (HPLC). Similarly, effects of some environmental factors on the alkaloids contents were investigatedin any regions. There was the highest level of hyoscyamine in leaves at flowering stage and of scopolamine in seeds, whereas stems were poorer in these alkaloids than other parts of plant. Hyoscyamine was dominant alkaloid, in different parts of the two species at various growth stages except in seed. Furthermore, hyoscyamine and scopolamine contents varied in different parts and various growth stages of these species, so that the highest levels of hyoscyamine and scopolamine were observed in roots, stems and leaves at flowering stage. R. arachnoideus Pojark contained more hyoscyamine and scopolaming than H. reticulatus L. at the three regions. The highest levels of hyoscyamine and scopolamine were observed in the plantscollected from Sephidekhan village. The results of investigation of some environmental factors effects on hyoscyamine and scopolamine levels showed that as altitude increased the level of the alkaloids in two species also increased. Furthermore, higher level of nitrogen and phosphorous in soil increased hyoscyamine and scopolamine levels in plants. Whereas, in contrast, lower level of potassium in soil increasedhyoscyamine and scopolamine levels.

 
Keyword(s): H. ARACHNOIDEUS POJARK, H. RETICULATUS L., HYOSCYAMINE, SCOPOLAMINE
 
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