Enhancing effect of UV-light on the accumulation of carthamine in dyer's saffron florets.
نویسندگان
چکیده
UV-C (254 nm)- and UV-B (280-320 nm)-light were irradiated onto bright-yellow capitula of dyer's saffron and their effects on carthamine accumulation compared. UV-C light promotes reddening of florets more prominently than UV-B light, yielding higher amounts of carthamine after the radiation process. The enhancement of carthamine synthesis by UV-C light was investigated on cellulose columns loaded with floret extracts under O2-sufficient or O2-deficient conditions. Externally charged O2 inhibits the UV-C- stimulated carthamine formation. The results are discussed in relation to light stimulation of carthamine synthesis in dyer's saffron florets.
منابع مشابه
Acceleration of Enzyme-Dependent Carthamin Formation by Manganese with Diversed Valence States
Effect of manganese with three different valence states on carthamin formation was studied by using freshly collected flowers from dyer’s saffron ( C. tinctorius) capitula. At 1 10 hm con centration, these cations accelerated markedly the carthamin formation induced by endoge nous enzyme(s) in the detached floral tissues. The acceleration was obviously dependent on the valence state of the te...
متن کاملEffect of Solar Ultraviolet-B plus End of Day Light and Its Exclusion on Growth Performance and Dry Weight Accumulation of Two Sweet Potato Cultivars (Ipomoea batatas L.) on Different Altitudes
UV-B radiation and EOD light (EOD) quality has both signaling and damaging effects based on the dosage and time of exposure. At highland areas UV-B decreases crop productivity and also light quality increase at high elevation area but EOD light quality effect was not researched based on altitude. Therefore, in the present study a field experiment was conducted to investigate the effects of UV-B...
متن کاملOptimization of extraction yield of carthamine and safflower yellow pigments from safflower (Carthamus tinctorious L.) under different treatments and solvent systems
Background and objectives: Safflower (Carthamus tinctorious L.) florets contain valuable red and yellow pigments and are used in food, textile dying, and pharmaceutical industries. Red carthamine pigment is formed from a yellow precursor, precarthamine, through an oxidation reaction at the end of flowers' maturation stage. The present study was conducted to find out the most effective ...
متن کاملEffect of Pollination Time on Yield and Antioxidant Properties of Some Pistachio Cultivars
To obtain the best quality and quantity of pistachio fruits, knowing the most suitable time of pollination, is of paramount importance. This study was conducted to investigate the effect of pollination time, different stages of female flower development, including A (lower florets opened and clusters were green), B (lower and medial florets opened and clusters were green), C (all florets opened...
متن کاملتعیین خصوصیات و ارزیابی آثار ضد آفتاب نانولیپوزوم‌های حاوی زعفران و سافرانال
Background and aim: Saffron possesses a lot of medical applications in traditional medicine. One of its properties is ultraviolet (UV) light absorption. The aim of this study was preparation, determination of properties and investigating sun protevtive effects of nanoliposomes containing saffron extract and safranal, a substance existing in saffron.Methods: Nanoliposomal hydroalcoholic extract ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Zeitschrift fur Naturforschung. C, Journal of biosciences
دوره 51 9-10 شماره
صفحات -
تاریخ انتشار 1996