Investigating the association between flowering time and defense in the Arabidopsis thaliana-Fusarium oxysporum interaction

Lyons, Rebecca, Rusu, Anca, Stiller, Jiri, Powell, Jonathan, Manners, John M. and Kazan, Kemal (2015) Investigating the association between flowering time and defense in the Arabidopsis thaliana-Fusarium oxysporum interaction. PL o S One, 10 6: 1-24. doi:10.1371/journal.pone.0127699


Author Lyons, Rebecca
Rusu, Anca
Stiller, Jiri
Powell, Jonathan
Manners, John M.
Kazan, Kemal
Title Investigating the association between flowering time and defense in the Arabidopsis thaliana-Fusarium oxysporum interaction
Formatted title
Investigating the association between flowering time and defense in the Arabidopsis thaliana-Fusarium oxysporum interaction
Journal name PL o S One   Check publisher's open access policy
ISSN 1932-6203
Publication date 2015-06
Sub-type Article (original research)
DOI 10.1371/journal.pone.0127699
Open Access Status DOI
Volume 10
Issue 6
Start page 1
End page 24
Total pages 24
Place of publication San Francisco, CA, United States
Publisher Public Library of Science
Collection year 2016
Language eng
Formatted abstract
Plants respond to pathogens either by investing more resources into immunity which is costly to development, or by accelerating reproductive processes such as flowering time to ensure reproduction occurs before the plant succumbs to disease. In this study we explored the link between flowering time and pathogen defense using the interaction between Arabidopsis thaliana and the root infecting fungal pathogen Fusarium oxysporum. We report that F. oxysporum infection accelerates flowering time and regulates transcription of a number of floral integrator genes, including FLOWERING LOCUS C (FLC), FLOWERING LOCUS T (FT) and GIGANTEA (GI). Furthermore, we observed a positive correlation between late flowering and resistance to F. oxysporum in A. thaliana natural ecotypes. Late-flowering gi and autonomous pathway mutants also exhibited enhanced resistance to F. oxysporum, supporting the association between flowering time and defense. However, epistasis analysis showed that accelerating flowering time by deletion of FLC in fve-3 or fpa-7 mutants did not alter disease resistance, suggesting that the effect of autonomous pathway on disease resistance occurs independently from flowering time. Indeed, RNA-seq analyses suggest that fve-3 mediated resistance to F. oxysporum is most likely a result of altered defense-associated gene transcription. Together, our results indicate that the association between flowering time and pathogen defense is complex and can involve both pleiotropic and direct effects.
Keyword Retinoblastoma associated protein
Systemic acquired resistance
Cis-regulatory variation
Disease resistance
Autonomous pathway
Floral transition
Circadian clock
Innate immunity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2016 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
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