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Isolation and characterization of mitochondrial manganese superoxide dismutase (MnSOD) from Capsicum annuum L.
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A cDNA clone for a mitochondrial manganese superoxide dismutase (MnSOD) was isolated and characterized from red pepper (Capsicum annuum L.). The clone consisted of 941 bp containing one open reading frame (ORF) of 687 bp, 34 bp/220 bp of 5'/3'-untranslated region. Amino acid sequence of the ORF
Tissue-specific activity of two manganese superoxide dismutase promoters in transgenic tobacco.
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In eukaryotes, manganese superoxide dismutase is a nuclear-encoded protein that scavenges superoxide radicals in the mitochondrial matrix. We have isolated two manganese superoxide dismutase genes from Nicotiana plumbaginifolia L. and fused the 5' upstream regulatory region of these genes to the
The induction of manganese superoxide dismutase in response to stress in Nicotiana plumbaginifolia.
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Superoxide dismutases (SODs) are metalloproteins that catalyse the dismutation of superoxide radicals to oxygen and hydrogen peroxide. The enzyme has been found in all aerobic organisms examined, where it plays a major role in the defence against toxic reduced oxygen species which are generated in
A plant manganese superoxide dismutase is efficiently imported and correctly processed by yeast mitochondria.
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In the plant Nicotiana plumbaginifolia, manganese superoxide dismutase (MnSOD) is synthesized in the cytoplasm as a preprotein and is subsequently translocated to the mitochondrial matrix with corresponding cleavage of an NH2-terminal leader sequence. To determine whether the plant enzyme could
Molecular cloning, characterisation and expression of a manganese superoxide dismutase gene from peach (Prunus persica [L.] Batsch).
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Two cDNA clones encoding mitochondrial manganese superoxide dismutases (MnSODs) from peach ( Prunus persica [L.] Batsch) were identified, which show homologies to several plant MnSODs. The amino acid sequence predicted from one full-length clone ( MnSOD1) showed the highest homology to an MnSOD from
ECA3, a Golgi-localized P2A-type ATPase, plays a crucial role in manganese nutrition in Arabidopsis.
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Calcium (Ca) and manganese (Mn) are essential nutrients required for normal plant growth and development, and transport processes play a key role in regulating their cellular levels. Arabidopsis (Arabidopsis thaliana) contains four P(2A)-type ATPase genes, AtECA1 to AtECA4, which are expressed in
Manganese toxicity to chlorophyll synthesis in tobacco callus.
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Tobacco (Nicotiana tabacum) pith explants were grown on manganese containing medium. At moderate concentration (10 millimolar), manganese selectively inhibited chlorophyll synthesis, resulting initially in growth of white callus. Several weeks later the white callus turned brown due to the
[Antioxidative response of Phytolacca americana and Nicotiana tabacum to manganese stresses].
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Plant species capable of accumulating heavy metals are of considerable interest for phytoremediation and phytomining. The mechanism of Mn tolerance/hyperaccumulate in Phytolacca americana L. is less known. To elucidate the role of antioxidative enzyme in response to Mn, the 6-week-old seedling of Mn
Factors Affecting the Enhancement of Oxidative Stress Tolerance in Transgenic Tobacco Overexpressing Manganese Superoxide Dismutase in the Chloroplasts.
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Two varieties of tobacco (Nicotiana tabacum var PBD6 and var SR1) were used to generate transgenic lines overexpressing Mn-superoxide dismutase (MnSOD) in the chloroplasts. The overexpressed MnSOD suppresses the activity of those SODs (endogenous MnSOD and chloroplastic and cytosolic Cu/ZnSOD) that
Expression of arabidopsis CAX2 in tobacco. Altered metal accumulation and increased manganese tolerance.
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Metal transport from the cytosol to the vacuole is thought to be an important component of ion tolerance and of a plant's potential for use in phytoremediation. The Arabidopsis antiporter CAX2 (calcium exchanger 2) may be a key mediator of this process. CAX2 expression in yeast suppressed both
Manganese nutrition of Nicotiana tabacum L. in relation to multiplication of tobacco mosaic virus.
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Identification and characterization of proteins involved in rice urea and arginine catabolism.
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Rice (Oryza sativa) production relies strongly on nitrogen (N) fertilization with urea, but the proteins involved in rice urea metabolism have not yet been characterized. Coding sequences for rice arginase, urease, and the urease accessory proteins D (UreD), F (UreF), and G (UreG) involved in urease
Over-expression of a protein kinase gene enhances the defense of tobacco against Rhizoctonia solani.
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To identify Nicotiana tabacum genes involved in resistance and susceptibility to Rhizoctonia solani, suppression subtractive hybridization was used to generate a cDNA library from transcripts that are differentially expressed during a compatible and incompatible interaction. This allowed the
Processing of a chimeric protein in chloroplasts is different in transgenic maize and tobacco plants.
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Transgenic maize (Zea mays L.) and tobacco (Nicotiana tabacum Petit Havana SR1) plants have been generated, which overproduce a mitochondrial Nicotiana plumbaginifolia manganese superoxide dismutase (MnSOD) in chloroplasts. For this, the mature MnSOD-coding sequence was fused to a chloroplast
Trichomes of tobacco excrete zinc as zinc-substituted calcium carbonate and other zinc-containing compounds.
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Tobacco (Nicotiana tabacum L. cv Xanthi) plants were exposed to toxic levels of zinc (Zn). Zn exposure resulted in toxicity signs in plants, and these damages were partly reduced by a calcium (Ca) supplement. Confocal imaging of intracellular Zn using Zinquin showed that Zn was preferentially
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