Strobilurins as growth-promoting compounds: how Stroby regulates Arabidopsis leaf growth

Judith Van Dingenen, Chrystalla Antoniou, Panagiota Filippou, Jacob Pollier, Nathalie Gonzalez, Stijn Dhondt, Alain Goossens, Vasileios Fotopoulos, Dirk Inzé

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Strobilurins are an important class of agrochemical fungicides used throughout the world on a wide variety of crops as protection against fungal pathogens. In addition to this protective role, they are reported to also positively influence plant physiology. In this study, we analysed the effect of Stroby® WG, a commercially available fungicide consisting of 50% (w/w) kresoxim-methyl (KM) as active strobilurin compound, on Arabidopsis leaf growth. Treatment of seedlings with Stroby resulted in larger leaves due to an increase in cell number. Transcriptome analysis of Stroby-treated rosettes demonstrated an increased expression of genes involved in redox homeostasis, iron metabolism and sugar transport. Stroby treatment strongly induced the expression of the subgroup Ib basic helix–loop–helix (bHLH) transcription factors, which have a role in iron homeostasis under iron-limiting conditions. Single loss-of-function mutants of three bHLHs and their triple bhlh039, bhlh100 and bhlh101 mutant did not respond to Stroby treatment. Although iron and sucrose content was not affected, nitric oxide (NO) levels and nitrate reductase (NR) activity were significantly increased in Stroby-treated rosettes as compared with control plants. In conclusion, we suggest that the Stroby-mediated effects on growth depend on the increased expression of the subgroup Ib bHLHs and higher NO levels.

Original languageEnglish
Pages (from-to)1748-1760
Number of pages13
JournalPlant Cell and Environment
Volume40
Issue number9
DOIs
Publication statusPublished - 24 Apr 2017

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Arabidopsis
saccharated ferric oxide
Iron
iron
Nitric Oxide
Homeostasis
Growth
Plant Physiological Phenomena
Agrochemicals
nitric oxide
leaves
Nitrate Reductase
fungicides
homeostasis
Gene Expression Profiling
Seedlings
mutants
Oxidation-Reduction
plant physiology
agrochemicals

Cite this

Van Dingenen, J., Antoniou, C., Filippou, P., Pollier, J., Gonzalez, N., Dhondt, S., ... Inzé, D. (2017). Strobilurins as growth-promoting compounds: how Stroby regulates Arabidopsis leaf growth. Plant Cell and Environment, 40(9), 1748-1760. https://doi.org/10.1111/pce.12980
Van Dingenen, Judith ; Antoniou, Chrystalla ; Filippou, Panagiota ; Pollier, Jacob ; Gonzalez, Nathalie ; Dhondt, Stijn ; Goossens, Alain ; Fotopoulos, Vasileios ; Inzé, Dirk. / Strobilurins as growth-promoting compounds : how Stroby regulates Arabidopsis leaf growth. In: Plant Cell and Environment. 2017 ; Vol. 40, No. 9. pp. 1748-1760.
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Van Dingenen, J, Antoniou, C, Filippou, P, Pollier, J, Gonzalez, N, Dhondt, S, Goossens, A, Fotopoulos, V & Inzé, D 2017, 'Strobilurins as growth-promoting compounds: how Stroby regulates Arabidopsis leaf growth', Plant Cell and Environment, vol. 40, no. 9, pp. 1748-1760. https://doi.org/10.1111/pce.12980

Strobilurins as growth-promoting compounds : how Stroby regulates Arabidopsis leaf growth. / Van Dingenen, Judith; Antoniou, Chrystalla; Filippou, Panagiota; Pollier, Jacob; Gonzalez, Nathalie; Dhondt, Stijn; Goossens, Alain; Fotopoulos, Vasileios; Inzé, Dirk.

In: Plant Cell and Environment, Vol. 40, No. 9, 24.04.2017, p. 1748-1760.

Research output: Contribution to journalArticle

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T1 - Strobilurins as growth-promoting compounds

T2 - how Stroby regulates Arabidopsis leaf growth

AU - Van Dingenen, Judith

AU - Antoniou, Chrystalla

AU - Filippou, Panagiota

AU - Pollier, Jacob

AU - Gonzalez, Nathalie

AU - Dhondt, Stijn

AU - Goossens, Alain

AU - Fotopoulos, Vasileios

AU - Inzé, Dirk

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Y1 - 2017/4/24

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