M. Ghorbanli; A. Sateyi; H. Kaboli Qarehtapeh
Abstract
Mistletoe is an evergreen, perennial and epiphytic plant of Loranthaceae which obtains all of its required water and nutrients such as Nitrogen and a small part of the food from the host plant by a root-like organ called "Haustorium". This plant is very important in terms of medical and pharmaceutical ...
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Mistletoe is an evergreen, perennial and epiphytic plant of Loranthaceae which obtains all of its required water and nutrients such as Nitrogen and a small part of the food from the host plant by a root-like organ called "Haustorium". This plant is very important in terms of medical and pharmaceutical and some of its effects in the treatment of many diseases have been proved. Two species of "Viscum album L." and "Arceuthobium oxycedri (D.C.) M. Bieb." both from the family Viscaceae are epiphytic plants. The dominant hosts of Viscum album L. in Gorgan forest are Parrotia persica (D.C.) C.A.Mey and Carpinus betulus L. respectively in altitude of 700 m and 1800m (above sea level). The host of Arceuthobium oxycedri (D.C.) M. Bieb is Juniperus polycarpus L in 2200m (above sea level). In this study, leaves and twigs of mistletoe and the host were collected. Three infected hosts from each species and three uninfected trees as control with similar conditions of diagonal and height were randomly selected, and the effects of these epiphytes on activity of antioxidant enzymes of the host plants, including Catalase, Peroxidase and Ascorbate peroxidase, were studied. The results showed that the infection of epiphyte caused drought stress in host plant and the activity of these enzymes was increased. The activity of Catalase in infected and uninfected hosts of V.album (P. persica and C. betulus) did not show significant differences, but in host of A. oxycedri (J. polycarpus) in male and female trees significant differences were observed. Activity of Ascorbate peroxidase and Peroxidase was significantly increased in all of infected hosts. But in none of the samples, activity of these enzymes was not dependent on the genus.
M. Ghorbanli; A. Sateei; S. Nasiri Savadkohi
Abstract
Plantago species generally are grassy plants that belong to Plantaginaceae, with large lamina on the ground surfaces. Plantago major L. grows widely in Asia, Europea, Africa, and North American and contains chemical compounds such as polysaccharides, lipids, coffeic acid derivatives, flavonoids, terpenoids, ...
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Plantago species generally are grassy plants that belong to Plantaginaceae, with large lamina on the ground surfaces. Plantago major L. grows widely in Asia, Europea, Africa, and North American and contains chemical compounds such as polysaccharides, lipids, coffeic acid derivatives, flavonoids, terpenoids, ascorbic acid, benzoic acid, ferrolic acid, galactoronic acid and so on. In this study, Plantago major L. plants were cultured in several pots irrigated with hougland solutions and after 20 days, during 3 leaves stage, irrigation was continued with hougland solutions containing different concentrations of CuSO4, 0 (control), 100, 300, 500, 700 and 100µM. Antioxidant enzymes activities (catalase, peroxidase, poly phenol oxidase, ascorbate peroxidase) and phenolics content in leaves and roots were measured. The aim of the study was the effect of copper concentrations on antioxidant enzymes and phenolic compounds content in plantago major L. The result shows that by increasing concentration of copper in the medium, activity of catalse, ascorbate peroxidase and peroxidase in the root and leaves decreased significantly (0.05) in comparison with control. Polyphenol oxidase enzyme activity in roots and leaves increased, that was only significant in roots. Phenolics content increase in roots that was not significant but the decrease in leaves was significant.
Zh. Asadi Kavan; M. Ghorbanli; A. Sateei
Abstract
Drought stress provokes ROS production in plant cell chloroplasts and subsequently causes lipid membrane peroxidation and damage. Pimpinella anisum L. is one of the aromatic herbal plants which has great export value. The aim of this study was applying exogenous ascorbate in order to control oxidative ...
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Drought stress provokes ROS production in plant cell chloroplasts and subsequently causes lipid membrane peroxidation and damage. Pimpinella anisum L. is one of the aromatic herbal plants which has great export value. The aim of this study was applying exogenous ascorbate in order to control oxidative stress during drought tolerance. Changes of pigment content of leaves, total phenol compounds, malonedialdehyde (MDA) content were measured. In a pot study, drought stress introduced to treatments with 3 replicates based on 3 levels of field capacity (100, 60 and 25%) and ascorbate (1.4 mM) sprayed on them. Chlorophyll content and chlorophyll a/b ratio decreased with increasing in stress levels, while flavonoids and anthocyanins increased. Carotene and xanthophyll increased only in moderate stress level due to drought. Exogenous ascorbate increased chlorophylls and carotenoid content but decreased flavonoid and anthocyanin contents and had great effect on increasing phenol compound in all stress levels. MDA content remained relatively constant, but increased significantly in severe stress levels. Applying exogenous ascorbate led to decreasing metabolite. According to the results exogenous ascorbate could increase the ability of Pimpinella anisum in response to drought stress with different mechanisms and had protective effect against lipid peroxidation due to drought stress.
