1,720,979 research outputs found
Purification and characterization of an ascorbate peroxidase from potato tuber mitochondria
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The mycotoxins beauvericin and T-2 induce cell death and alteration to the ascorbate metabolism in tomato protoplasts
No full textThe phytotoxicity of the mycotoxins from Fusarium spp. beauvericin and T-2 toward tomato protoplasts was evaluated. Both toxins
caused protoplast death, but the phytotoxicity of beauvericin was much more severe in terms of reduction in protoplast viability. The possible
involvement of the ascorbate system in the response induced by the two mycotoxins was also studied. Tomato protoplast death was preceded
by an imbalance of the ascorbate system, which was diversely affected by the two mycotoxins. Beauvericin caused a decrease in the ascorbate
level, whereas T-2 induced a significant increase in dehydroascorbate. The changes in the activity of ascorbate peroxidase, the most efficient
scavenger of hydrogen peroxide in plant cells present in all cell compartments, were also analysed. Ascorbate peroxidase activity decreased
after 3 h of treatment with beauvericin. The activity of dehydroascorbate reductase, the enzyme involved in ascorbate regeneration from its
oxidized form, also increased within the first hour of treatment. T-2 treatment did not induce significant changes in either ascorbate
peroxidase or dehydroascorbate reductase activities. The possible role of the ascorbate system in tomato protoplast death induced by
treatment with beauvericin and T-2 mycotoxins is discusse
A new dehydroascorbate reducing protein is expressed in tomato plants in response to treatment with Beauvericin
No full textIsolamento e caratterizzazione di un gene codificante per una acquaporina del tonoplasto in radici di zucca (Cucurbita pepo L.). Studi preliminari
No full textIsolation and characterization of a novel aquaporin in pumpkin (Cucurbita pepo L.) roots
No full textThe importance of the ascorbate-glutathione system in developing beauvericin and T-2 toxin tolerant tomato plants
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