نتایج جستجو برای: amount of carotenoids
تعداد نتایج: 21164983 فیلتر نتایج به سال:
The oxidation handicap hypothesis proposes that testosterone mediates the trade-off between the expression of secondary sexual traits and the fight against free radicals. Coloured traits controlled by testosterone can be produced by carotenoid pigments (yellow-orange-red traits), but carotenoids also help to quench free radicals. Recently, it has been shown that testosterone increases the amoun...
To study the physiological and morphological relationships of two clover species affected by herbicides, Pursuit experiment in a factorial based on randomized completely design with 3 replications at the Damavand in 2012. The first factor consisted of two species of Trifolium pretense L. and Trifolium alexandrinum L. and the second factor consisted of three levels of herbicide...
Effect of salinity stress on some morphophysiological and biochemical traits of two barley cultivars
Considering the increasing trend of salinity development and the lack of suitable arable lands for agriculture in the world, the use of saline resistant species that reduce the effects of salinity stress in plants is very important. The aim of the present study was, investigation and comparison of morphophysiological and biochemical traits in leaf tissue of two barley cultivars (Aklyl and Zahak...
Manipulating cell cultures by elicitors is one of the important strategies for induction of valuable metabolites in plant biotechnology. Therefore, in this study the effect of ultrasound and salinity on growth, primary and secondary metabolite production was studied in Dunaliella salina microalgae cell culture. Cell cultures were treated with sodium chloride salt at concentrations of 2 and 3 M ...
One of the signs of climate change is variation of the amount of greenhouse gases in the earth's atmosphere. It is expected that addition of carbon dioxide could affect on radiation-energy balance and thus change global climate. The aim of this study was to investigate the effect of CO2 enrichment on leaf characteristics and change in pigments of two varieties of Eustoma grandiflorum cut flower...
Carotenoids are the most common pigments in nature and are synthesized by all photosynthetic organisms and fungi. Carotenoids are considered key molecules for life. Light capture, photosynthesis photoprotection, excess light dissipation and quenching of singlet oxygen are among key biological functions of carotenoids relevant for life on earth. Biological properties of carotenoids allow for a w...
objective fungi produce many different carotenoids and some are attractive in medical and industrial sources. in this work the ability of mucor hiemalis (ptcc 5292) to produce carotenoids in media with different nitrogenous and carbon sources and incubation with white, yellow, blue and red lights (15w, 220v, e27) against dark-grown were studied. materials and method the microorganism cultivatio...
Carotenoids are one of the most important and widely distributed pigments in nature and have essential biological functions in organisms. They also impart distinctive and attractive coloration to the breeding animals. Over the past two decades, application of microbial carotenoids has attracted the attention of researchers due to their natural and economic advantages. However, carotenoid produc...
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