Journal
ANTIOXIDANTS
Volume 9, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/antiox9080717
Keywords
catecholamine; tyrosine hydroxylase; Solanum tuberosum; reactive oxygen species; oxidative stress; antioxidants
Funding
- National Science Centre (NCN, Poland) [2017/24/C/NZ1/00393]
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Catecholamines are biogenic aromatic amines common among both animals and plants. In animals, they are synthesized via tyrosine hydroxylation, while both hydroxylation or decarboxylation of tyrosine are possible in plants, depending on the species, though no tyrosine hydroxylase-a counterpart of the animal enzyme-has been identified yet. It is known that in potato plants, it is the decarboxylation of tyrosine that leads to catecholamine production. In this paper, we present the effects of the induction of an alternative route of catecholamine production by introducing the tyrosine hydroxylase gene from rat. We demonstrate that an animal system can be used by the plant. However, it does not function to synthesize catecholamines. Instead, it leads to elevated reactive oxygen species content and a constant stress condition in the plant, which responds with elevated antioxidant levels and improved resistance to infection.
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