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Barley yellow dwarf virus infection and elevated CO2 alter the antioxidants ascorbate and glutathione in wheat

journal contribution
posted on 28.10.2020, 00:00 by RK Vandegeer, KS Powell, Michael Tausz
Plant antioxidants ascorbate and glutathione play an important role in regulating potentially harmful reactive oxygen species produced in response to virus infection. Barley yellow dwarf virus is a widespread viral pathogen that systemically infects cereal crops including wheat, barley and oats. In addition, rising atmospheric CO2 will alter plant growth and metabolism, including many potential but not well understood effects on plant-virus interactions. In order to better understand the wheat-BYDV interaction and any potential changes under elevated CO2, the total concentration and oxidised fraction of ascorbate and glutathione was measured in leaves of a susceptible wheat cultivar (Triticum aestivum L. 'Yitpi') infected with Barley yellow dwarf virus-PAV (Padi Avenae virus) and grown under elevated CO2 in controlled environment chambers. Virus infection decreased total leaf ascorbate and glutathione concentrations and increased the fraction of oxidised ascorbate (dehydroascorbate). Elevated CO2 decreased the fraction of oxidised ascorbate. In this work, we demonstrate that systemic infection by a phloem-restricted virus weakens the antioxidant pools of ascorbate and glutathione. In addition, elevated CO2 may decrease oxidative stress, for example, from virus infection, but there was no direct evidence for an interactive effect between treatments. © 2016 Elsevier GmbH.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

199

Start Page

96

End Page

99

Number of Pages

4

eISSN

1618-1328

ISSN

0176-1617

Publisher

Elsevier

Peer Reviewed

Yes

Open Access

No

Acceptance Date

13/05/2016

External Author Affiliations

Agriculture Victoria

Era Eligible

Yes

Journal

Journal of Plant Physiology