Title
Effects of ozone on wild type and transgenic tobacco Effects of ozone on wild type and transgenic tobacco
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Praha ,
Subject
Biology
Source (journal)
Biologia plantarum / Czechoslovak Academy of Sciences. - Praha
Volume/pages
53(2009) :4 , p. 670-676
ISSN
0006-3134
ISI
000272118600012
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Tocopherol cyclase (TC, encoded by gene VTE1) catalyzes the penultimate step of tocopherol synthesis. In this study we used wild type and transgenic tobacco plants overexpressing VTE1 from Arabidopsis to examine the role of tocopherol in ozone sensitivity. Wild type plants responded to an 4-h exposure to 300 nmol mol−1 ozone by severe leaf necrosis while the transgenic lines exhibited limited injury. Compared with the wild type, VTE1-overexpressing plants had lower increase in hydrogen peroxide, malondialdehyde contents and ion leakage, and lower decrease of net photosynthetic rate 48 h following the ozone exposure. Transgenic plants also better maintained the structural integrity of the photosynthetic apparatus.
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