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Sub-lethal UV-C radiation induces callose, hydrogen peroxide and defence-related gene expression in Arabidopsis thaliana

Mintoff, S.J.L., Rookes, J.E. and Cahill, D.M. 2015, Sub-lethal UV-C radiation induces callose, hydrogen peroxide and defence-related gene expression in Arabidopsis thaliana, Plant biology, vol. 17, no. 3, pp. 703-711, doi: 10.1111/plb.12286.

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Title Sub-lethal UV-C radiation induces callose, hydrogen peroxide and defence-related gene expression in Arabidopsis thaliana
Author(s) Mintoff, S.J.L.
Rookes, J.E.ORCID iD for Rookes, J.E. orcid.org/0000-0003-1479-2339
Cahill, D.M.ORCID iD for Cahill, D.M. orcid.org/0000-0002-2556-0528
Journal name Plant biology
Volume number 17
Issue number 3
Start page 703
End page 711
Total pages 9
Publisher Wiley
Place of publication London, Eng.
Publication date 2015-05
ISSN 1435-8603
1438-8677
Keyword(s) Arabidopsis
PDF1.2
PR1
callose
cross-tolerance
leaf curling
ultraviolet light
Summary Exposure of plants to UV-C irradiation induces gene expression and cellular responses that are commonly associated with wounding and pathogen defence, and in some cases can lead to increased resistance against pathogen infection. We examined, at a physiological, molecular and biochemical level, the effects of and responses to, sub-lethal UV-C exposure on Arabidopsis plants when irradiated with increasing dosages of UV-C radiation. Following UV-C exposure plants had reduced leaf areas over time, with the severity of reduction increasing with dosage. Severe morphological changes that included leaf glazing, bronzing and curling were found to occur in plants treated with the 1000 J·m(-2) dosage. Extensive damage to the mesophyll was observed, and cell death occurred in both a dosage- and time-dependent manner. Analysis of H2 O2 activity and the pathogen defence marker genes PR1 and PDF1.2 demonstrated induction of these defence-related responses at each UV-C dosage tested. Interestingly, in response to UV-C irradiation the production of callose (β-1,3-glucan) was identified at all dosages examined. Together, these results show plant responses to UV-C irradiation at much lower doses than have previously been reported, and that there is potential for the use of UV-C as an inducer of plant defence.
Language eng
DOI 10.1111/plb.12286
Field of Research 060705 Plant Physiology
Socio Economic Objective 960413 Control of Plant Pests
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30069158

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Created: Wed, 21 Jan 2015, 08:35:20 EST

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