alpha tocopherol/zandraket

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Accumulation of γ- rather than α-tocopherol alters ethylene signaling gene expression in the vte4 mutant of Arabidopsis thaliana.

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Tocopherols are antioxidants found in chloroplasts of leaves, and it is a matter of current debate whether or not they can affect signaling and gene expression in plant cells. For insight into the possible effects of altered tocopherol composition in chloroplasts on gene expression in the nucleus,

Rapid enhancement of α-tocopherol content in Nicotiana benthamiana by transient expression of Arabidopsis thaliana Tocopherol cyclase and Homogentisate phytyl transferase genes.

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Agrobacterium-mediated transient gene expression have become a method of choice over stable plant genetic transformation. Tocopherols are a family of vitamin E compounds, which are categorized along with tocotrienols occurring naturally in vegetable oils, nuts and leafy green vegetables. This

Antioxidant value addition in human diets: genetic transformation of Brassica juncea with gamma-TMT gene for increased alpha-tocopherol content.

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Alpha-tocopherol, the most biologically active form of vitamin E, is implicated in decreasing the risk of several types of cancers, coronary heart disease and a number of degenerative human conditions, when taken in excess of the recommended daily allowance. Natural alpha-tocopherol has twice the

Characterization of gamma-tocopherol methyltransferases from Capsicum annuum L and Arabidopsis thaliana.

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Tocopherols are essential micronutrients in human and animal nutrition due to their function as lipophilic antioxidants. They are exclusively synthesized by photosynthetic organisms including higher plants. Despite the attributed beneficial health effects and many industrial applications, research

Effect of short-term salt stress on oxidative stress markers and antioxidant enzymes activity in tocopherol-deficient Arabidopsis thaliana plants.

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Changes of carotenoids and anthocyanins content, lipid peroxidation, and activity of antioxidant enzymes were studied in wild type and tocopherol-deficient lines vte1 and vte4 of Arabidopsis thaliana subjected to 200 mM NaCI during 24 h. The salt stress enhanced the intensity of lipid peroxidation

Photoprotection mutants of Arabidopsis thaliana acclimate to high light by increasing photosynthesis and specific antioxidants.

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Biochemical and physiological acclimation to different light environments is crucial for plant growth and survival. In high light (HL), feedback de-excitation (qE) is a well-known photoprotective mechanism that dissipates excess excitation energy in the light-harvesting antenna of photosystem II

Abscisic acid-induced modulation of metabolic and redox control pathways in Arabidopsis thaliana.

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Abscisic acid (ABA) has been implicated as a mediator in plant responses to various environmental stresses. To evaluate the transcriptional and metabolic events downstream of ABA perception, Arabidopsis thaliana seedlings were analyzed by transcript and metabolite profiling, and results were

Antioxidant status, peroxidase activity, and PR protein transcript levels in ascorbate-deficient Arabidopsis thaliana vtc mutants.

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Ascorbate is the most abundant small molecule antioxidant in plants and is proposed to function, along with other members of an antioxidant network, in controlling reactive oxygen species. A biochemical and molecular characterization of four ascorbate-deficient (vtc) Arabidopsis thaliana mutants has

Overexpression of the maize γ-tocopherol methyltransferase gene (ZmTMT) increases α-tocopherol content in transgenic Arabidopsis and maize seeds.

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The vitamin E family includes tocopherols and tocotrienols, which are essential lipid-soluble antioxidants necessary for human and livestock health. The seeds of many plant species, including maize, have high gamma (γ)-tocopherol but low alpha (α)-tocopherol contents; however, α-tocopherol is the

Dynamic changes in plant secondary metabolites during UV acclimation in Arabidopsis thaliana.

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Plants respond to environmental stress by synthesizing a range of secondary metabolites for defense purposes. Here we report on the effect of chronic ultraviolet (UV) radiation on the accumulation of plant secondary metabolites in Arabidopsis thaliana leaves. In the natural environment, UV is a

Early effects of salt stress on the physiological and oxidative status of Cakile maritima (halophyte) and Arabidopsis thaliana (glycophyte).

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Early changes in physiological and oxidative status induced by salt stress were monitored in two Brassicaceae plants differing in their tolerance to salinity, Cakile maritima (halophyte) and Arabidopsis thaliana (glycophyte). Growth response and antioxidant defense of C. maritima under 400 mM NaCl

Ethylene signaling may be involved in the regulation of tocopherol biosynthesis in Arabidopsis thaliana.

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Tocopherol biosynthesis was investigated in ein3-1, etr1-1 and eto1-1 mutants of Arabidopsis thaliana, which show a defect in ethylene signaling, perception and over-produce ethylene, respectively. A mutation in the EIN3 gene delayed the water-stress related increase in alpha-tocopherol and caused a

Vitamin E is essential for the tolerance of Arabidopsis thaliana to metal-induced oxidative stress.

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Arabidopsis (Arabidopsis thaliana) plants were grown in a hydroponic culture system for 7 to 14 d in the absence or presence of 75 microM Cd or 75 microM Cu. The Cu treatment resulted in visual leaf symptoms, together with anthocyanin accumulation and loss of turgor. Pronounced lipid peroxidation,

Interplay between vitamin E and phosphorus availability in the control of longevity in Arabidopsis thaliana.

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OBJECTIVE Vitamin E helps to control the cellular redox state by reacting with singlet oxygen and preventing the propagation of lipid peroxidation in thylakoid membranes. Both plant ageing and phosphorus deficiency can trigger accumulation of reactive oxygen species, leading to damage to the

A role for tocopherol biosynthesis in Arabidopsis thaliana basal immunity to bacterial infection.

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Tocopherols are lipid-soluble antioxidants synthesized in plastids of higher plants and other photosynthetic organisms. The four known tocopherols alpha-, beta-, gamma- and delta-tocopherol differ in number and position of methyl groups on their chromanol head group. In unstressed Arabidopsis

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