Virus infection improves drought tolerance

Xu, Ping, Chen, Fang, Mannas, Jonathan P, Feldman, Tracy, Sumner, Lloyd W and Roossinck, Marilyn J (2008) Virus infection improves drought tolerance. New Phytologist, 180 (4). pp. 911-921. ISSN 0028-646X

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Viruses are obligate intracellular symbionts. Plant viruses are often discovered and studied as pathogenic parasites that cause diseases in agricultural plants. However, here it is shown that viruses can extend survival of their hosts under conditions of abiotic stress that could benefit hosts if they subsequently recover and reproduce. Various plant species were inoculated with four different RNA viruses, Brome mosaic virus (BMV), Cucumber mosaic virus (CMV), Tobacco mosaic virus and Tobacco rattle virus. The inoculated plants were stressed by withholding water. The onset of drought symptoms in virus-infected plants was compared with that in the plants that were inoculated with buffer (mock-inoculated plants). Metabolite profiling analysis was conducted and compared between mock-inoculated and virus-infected plants before and after being subjected to drought stress. In all cases, virus infection delayed the appearance of drought symptoms. Beet plants infected with CMV also exhibited significantly improved tolerance to freezing. Metabolite profiling analysis showed an increase in several osmoprotectants and antioxidants in BMV-infected rice and CMV-infected beet plants before and after drought stress. These results indicate that virus infection improves plant tolerance to abiotic stress, which correlates with increased osmoprotectant and antioxidant levels in infected plants.

Item Type: Article
Additional Information: This article is corrected by: Errata: Corrigendum Volume 184, Issue 1, 275, Article first published online: 2 September 2009 (DOI: 10.1111/j.1469-8137.2009.02986.x)
Uncontrolled Keywords: physiological adaptation,antioxidants,dehydration,droughts,freezing,host-pathogen interactions,plant diseases,plant physiological phenomena,plants,principal component analysis,rna viruses
Depositing User: Pure Connector
Date Deposited: 21 Feb 2017 02:23
Last Modified: 22 Oct 2022 02:20
DOI: 10.1111/j.1469-8137.2008.02627.x

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