Endomembrane Ca2+-AtPases play a significant role in virus-induced adaptation to oxidative stress
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Although the role of Ca2+ influx channels in oxidative stress signaling and cross-tolerance in plants is well established, little is known about the role of active Ca2+ efflux systems in this process. In our recent paper,17 we reported Potato Virus X (PVX)-induced acquired resistance to oxidative stress in Nicotiana benthamiana and showed the critical role of plasma membrane Ca2+/H+ exchangers in this process. The current study continues this research. Using biochemical and electrophysiological approaches, we reveal that both endomembrane P2A and P2B Ca2+-ATPases play significant roles in adaptive responses to oxidative stress by removing excessive Ca2+ from the cytosol, and that their functional expression is significantly altered in PVX-inoculated plants. These findings highlight the crucial role of Ca2+ efflux systems in acquired tolerance to oxidative stress and open up prospects for practical applications in agriculture, after in-depth comprehension of the fundamental mechanisms involved in common responses to environmental factors at the genomic, cellular and organismal levels.
Originalsprog | Dansk |
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Tidsskrift | Plant Signalling & Behavior |
Vol/bind | 6 |
Udgave nummer | 7 |
Sider (fra-til) | 1053-1056 |
Antal sider | 4 |
ISSN | 1559-2316 |
DOI | |
Status | Udgivet - 2011 |
ID: 36138137