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Plasma membrane Ca2+ transporters mediate virus-induced acquired resistance to oxidative stress


Shabala, SN and Baekgaard, L and Shabala, Lana and Fuglsang, A and Babourina, O and Palmgren, MG and Cuin, TA and Rengel, Z and Nemchinov, LG, Plasma membrane Ca2+ transporters mediate virus-induced acquired resistance to oxidative stress, Plant, Cell and Environment, 34, (3) pp. 406-417. ISSN 0140-7791 (2011) [Refereed Article]

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DOI: doi:10.1111/j.1365-3040.2010.02251.x


This paper reports the phenomenon of acquired cross-tolerance to oxidative stress in plants and investigates the activity of specific Ca2+ transport systems mediating this phenomenon. Nicotiana benthamiana plants were infected with Potato virus X (PVX) and exposed to oxidative [either ultraviolet (UV-C) or H2O2] stress. Plant adaptive responses were assessed by the combined application of a range of electrophysiological (non-invasive microelectrode ion flux measurements), biochemical (Ca2+- and H+-ATPase activity), imaging (fluorescence lifetime imaging measurements of changes in intracellular Ca2+ concentrations), pharmacological and cytological transmission electrone microscopy techniques. Virus-infected plants had a better ability to control UV-induced elevations in cytosolic-free Ca2+ and prevent structural and functional damage of chloroplasts. Taken together, our results suggest a high degree of crosstalk between UV and pathogen-induced oxidative stresses, and highlight the crucial role of Ca2+ efflux systems in acquired resistance to oxidative stress in plants.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Industrial crops
Objective Field:Industrial crops not elsewhere classified
UTAS Author:Shabala, SN (Professor Sergey Shabala)
UTAS Author:Shabala, Lana (Associate Professor Lana Shabala)
UTAS Author:Cuin, TA (Dr Tracey Cuin)
ID Code:68192
Year Published:2011
Web of Science® Times Cited:28
Deposited By:Agricultural Science
Deposited On:2011-03-10
Last Modified:2014-07-31

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