نتایج جستجو برای: chlorophyll and carotenoids
تعداد نتایج: 16830534 فیلتر نتایج به سال:
Passive optical hyperspectral remote sensing of plant pigments offers potential for understanding plant ecophysiological processes across a range of spatial scales. Following a number of decades of research in this field, this paper undertakes a systematic meta-analysis of 85 articles to determine whether passive optical hyperspectral remote sensing techniques are sufficiently well developed to...
background and objectives: infunction of the photosynthetic apparatus of halophytes plays an important role in their salinity tolerance. kochia as a halophyte, is of high ability in biomass production in salinity stress conditions. thus study photosynthesis and the related factors salinity stress can provide appropriate physiological view for better understanding of the plant mechanisms of in s...
Carotenoids are chloroplast constituents. In vivo different carotenoids may be present at different sites within the chloroplast, and may have different functions. Especially important is a role in protecting the chloroplast and hence the p lant from chlorophyll-sensitized photooxidation. If carotenoid biosynthesis can be blocked by herbicides, such protection will no longer be afforded, and ra...
One of the major tissue damage following exposure to stress in plants is caused by the oxidative stress. In this study effects of different levels of methyl isothiocyanate on biochemical parameters and antioxidant enzyme activity such as ascorbate peroxidase, catalase and guaiacol peroxidase in seedling Lepidiun sativum L. under in vitro was investigated. The seeds of Lepidium sativum (Garden C...
To assess nickel-induced toxicity in plants, Zea mays seeds were germinated and cultured on nutrient solution with nickel concentrations of 0, 50, 100 and 200 μM for a period of two weeks. Its effects on the growth, Hill reaction and photosynthetic pigments content were then investigated. The fresh and dry weight of leaves and roots increased in 50 μM nickel, but decreased in 100 and 200 ...
Adiantum capillus-veneris is important endangered fern species with several medicinal properties. In this study, the leaves samples were extracted and separated using reversed phase HPLC with DAD for carotenoids, chlorophylls and phenolic compounds. Separation of carotenoids and chlorophylls were carried out using a tertiary gradient system of water, MTBE and methanol-water, while a binary grad...
For photosynthesis, phototrophic organisms necessarily synthesize not only chlorophylls but also carotenoids. Many kinds of carotenoids are found in algae and, recently, taxonomic studies of algae have been developed. In this review, the relationship between the distribution of carotenoids and the phylogeny of oxygenic phototrophs in sea and fresh water, including cyanobacteria, red algae, brow...
Russian wheat aphid, Diuraphis noxia (Mordvilko), feeding injury on 'Betta' wheat isolines with the Dn1 and Dn2 genes was compared by assessing chlorophyll and carotenoid concentrations, and aphid fecundity. The resistant Betta isolines (i.e., Betta-Dn1 and Betta-Dn2) supported similar numbers of aphids, but had significantly fewer than the susceptible Betta wheat, indicating these lines are re...
The occurrence of fringed wings insect, Pseudodendrothrips mori is a major pest of mulberry, which causes a considerable leaf yield loss and inturn damages its quality. Hence, an attempt was made to know the changes in biochemical constituents (Free amino acids, total soluble proteins, total reducing sugars, total soluble sugars, starch and total phenols) and photosynthetic pigments (total chlo...
Since gibberellic acid has a critical role in plants tolerance to abiotic stress, therefore in present research the impact of salt water and gibberellic acid treatment on guava seedlings physiological responces were considered. The factorial experiment was carried out as a complete randomized design with four replications. Treatments included sodium chloride (0, 50 and 100 mM) and gibberellic a...
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