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Advisor(s)
Abstract(s)
Peroxiredoxins (Prxs) play major roles in preventing oxidative damage and their function is consistent with the presence
of Prx isoforms in most, if not all, cellular compartments and their expression is dependent on environmental
conditions. The aim of this study was to identify and characterize genes encoding Prxs in Vitis vinifera. Quantitative
real time polymerase chain reaction (qRT PCR) was used to determine their response to irradiance, heat, and water
stress. We identified seven vvprx genes, two of which were especially responsive to water stress, followed by heat
stress, but no major changes were observed after high irradiance. The vvprxIIF targeted to mitochondria was the most
responsive to water stress and it might be involved in drought tolerance through H2O2 signalling. The vvprxII-2, a
putative PrxII, is targeted to the chloroplasts and was the most responsive to heat stress. It might be related with
abscisic acid-dependent thermotolerance
Description
Keywords
abscisic acid antioxidants grapevine heat stress photosynthesis qRT PCR water stress
Pedagogical Context
Citation
"Biologia Plantarum". ISSN 0006-3134. 57(4) (2013) 675-683