alpha-Tocopherol is synthesized exclusively in oxygenic phototrophs and is known to function as a lipid-soluble antioxidant. Here, we report that alpha-tocopherol also has a novel function independent of its antioxidant properties in the cyanobacterium Synechocystis sp. PCC 6803. The photoautotrophic growth rates of wild type and mutants impaired in alpha-tocopherol biosynthesis are identical, ...

Lemna perpusilla 6746, grown photoautotrophically at a series of sulfate concentrations ranging from 0.32 to 1,000 mum, was labeled to radioisotopic equilibrium with (35)SO(4) (2-). Sulfur-containing compounds were isolated and purified from the colonies. Radioactivity in each compound was a measure of the amount of that compound present in the tissue. The following compounds were identified an...

TIP GROWTH DEFECTIVE1 (TIP1) of Arabidopsis thaliana affects cell growth throughout the plant and has a particularly strong effect on root hair growth. We have identified TIP1 by map-based cloning and complementation of the mutant phenotype. TIP1 encodes an ankyrin repeat protein with a DHHC Cys-rich domain that is expressed in roots, leaves, inflorescence stems, and floral tissue. Two homologu...

Iron-Sulfur (Fe-S) clusters and proteins are essential to many growth and developmental processes. In plants, they exist in the plastids, mitochondria, cytosol, and nucleus. Six types of Fe-S clusters are found in the plastid: classic 2Fe-2S, NEET-type 2Fe-2S, Rieske-type 2Fe-2S, 3Fe-4S, 4Fe-4S, and siroheme 4Fe-4S. Classic, NEET-type, and Rieske-type 2Fe-2S clusters have the same 2Fe-2S core; ...

materials and methods a multivariate variance experiment was performed. to assess the effect of essential oil, nisin and the incubation temperature on growth probability (log p%) of s. typhimurium and s. aureus, four concentrations of c. cyminum l. essential oil (0, 15, 30 and 45 µl/100 ml), three concentrations of nisin (0, 0.5 and 1.5 µg/ml) and three storage temperatures (10, 25 and 35°c) we...

a-Tocopherol is synthesized exclusively in oxygenic phototrophs and is known to function as a lipid-soluble antioxidant. Here, we report that a-tocopherol also has a novel function independent of its antioxidant properties in the cyanobacterium Synechocystis sp. PCC 6803. The photoautotrophic growth rates of wild type and mutants impaired in a-tocopherol biosynthesis are identical, but the muta...

Due to changes in the ecosystem and misuse of resources, salinity also increases. Approximately 20% all irrigated land is affected by this will increase over time. Therefore, it necessary develop more environmentally friendly agricultural techniques but exploit potential crops with high nutritional value tolerance like quinoa (Chenopodium Willd.). In context, potassium an essential macronutrien...