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231225s2004 xx |||||o 00| ||eng c |
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|a 10.1111/j.1469-8137.2004.01132.x
|2 doi
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Jansen, Marcel A K
|e verfasserin
|4 aut
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|a Over-expression of phenol-oxidising peroxidases alters the UV-susceptibility of transgenic Nicotiana tabacum
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|c 2004
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 20.04.2021
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a • Class III peroxidases catalyse the oxidative crosslinking of UV-absorbing phenolics. The effect of changes in the activity of phenol oxidising peroxidases (EC 1.11.1.7) on UV-tolerance in Nicotiana tabacum plants has been determined. • The UV-sensitivity of transgenic N. tabacum lines, altered in their peroxidase expression pattern, was studied by measuring radiation effects on photosynthetic efficiency. • Analysis of the effect of UV-radiation on the relative variable chlorophyll fluorescence showed that the SPI-2 line, which over-expresses a defence-related cationic peroxidase, is markedly UV-tolerant. By contrast, the ROPN3-line, which overexpresses a synthetic horseradish peroxidase-C gene, was found to be UV-sensitive. The increased activity of indole-3-acetic acid (IAA) inducible peroxidases in homozygous IAA-overproducing transgenic plants was also found to correlate with UV-sensitivity. • It is concluded that only specific peroxidase isozymes, through their effects on phenolic metabolism, contribute to the UV protection response. Thus, the analysis of the role of isozymes in UV-protection addresses fundamental questions of isozyme diversity and/or redundancy in relation to phenolic substrates
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| 650 |
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|a Journal Article
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4 |
|a Nicotiana tabacum (tobacco)
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4 |
|a UV-radiation
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4 |
|a auxin
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4 |
|a chlorophyll a fluorescence
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| 650 |
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4 |
|a peroxidase
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| 650 |
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4 |
|a stress
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1 |
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|a Elfstrand, Malin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Heggie, Laura
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sitbon, Folke
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Dix, Philip J
|e verfasserin
|4 aut
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| 700 |
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|a Thorneley, Roger N F
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t The New phytologist
|d 1979
|g 163(2004), 3 vom: 20. Sept., Seite 585-594
|w (DE-627)NLM09818248X
|x 1469-8137
|7 nnns
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| 773 |
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|g volume:163
|g year:2004
|g number:3
|g day:20
|g month:09
|g pages:585-594
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|u http://dx.doi.org/10.1111/j.1469-8137.2004.01132.x
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