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Plant architecture and foliar senescence impact the race between wheat growth and Zymoseptoria tritici epidemics
- Source :
- Annals of Botany, Annals of Botany, 2018, 121 (5), pp.975-989. ⟨10.1093/aob/mcx192⟩, Annals of Botany, Oxford University Press (OUP), 2018, 121, pp.975-989. ⟨10.1093/aob/mcx192⟩, Annals of Botany, Oxford University Press (OUP), 2018, 121 (5), pp.975-989. ⟨10.1093/aob/mcx192⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- Background and Aims: In order to optimize crop management in innovative agricultural production systems, it is crucial to better understand how plant disease epidemics develop and what factors influence them. This study explores how canopy growth, its spatial organization and leaf senescence impact Zymoseptoria tritici epidemics. Methods: We used the Septo3D model, an epidemic model of Septoria tritici blotch (STB) coupled with a 3-D virtual wheat structural plant model (SPM). The model was calibrated and evaluated against field experimental data. Sensitivity analyses were performed on the model to explore how wheat plant traits impact the interaction between wheat growth and Z. tritici epidemics. Key Results: The model reproduces consistently the effects of crop architecture and weather on STB progress on the upper leaves. Model sensitivity analyses show that the effects of plant traits on epidemics depended on weather conditions. The simulations confirm the known effect of increased stem height and stem elongation rate on limiting STB progress on upper leaves. Strikingly, the timing of leaf senescence is one of the most influential traits on simulated STB epidemics. When the green life span duration of leaves is reduced by early senescence, epidemics are strongly reduced. Conclusions: We introduce the notion of a 'race' for the colonization of emerging healthy host tissue between the growing canopy and the developing epidemics. This race is 2-fold: (1) an upward race at the canopy scale where STB must catch the newly emerging leaves before they grow away from the spore sources; and (2) a local race at the leaf scale where STB must use the resources of its host before it is caught by leaf apical senescence. The results shed new light on the importance of dynamic interactions between host and pathogen. (Resume d'auteur)
- Subjects :
- 0106 biological sciences
0301 basic medicine
Canopy
architecture
leaf senescence
[SDV]Life Sciences [q-bio]
F62 - Physiologie végétale - Croissance et développement
Plant Science
F50 - Anatomie et morphologie des plantes
01 natural sciences
epidemics
Crop
03 medical and health sciences
Race (biology)
Septoria
Ascomycota
wheat
virtual plant model
canopy traits
Colonization
Triticum
H20 - Maladies des plantes
Plant Diseases
2. Zero hunger
FSPM
biology
Host (biology)
fungi
food and beverages
Original Articles
Spores, Fungal
15. Life on land
biology.organism_classification
Plant disease
Plant Leaves
030104 developmental biology
Agronomy
13. Climate action
Host-Pathogen Interactions
Zymoseptoria tritici
Septoria tritici blotch
Epidemic model
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 03057364 and 10958290
- Database :
- OpenAIRE
- Journal :
- Annals of Botany, Annals of Botany, 2018, 121 (5), pp.975-989. ⟨10.1093/aob/mcx192⟩, Annals of Botany, Oxford University Press (OUP), 2018, 121, pp.975-989. ⟨10.1093/aob/mcx192⟩, Annals of Botany, Oxford University Press (OUP), 2018, 121 (5), pp.975-989. ⟨10.1093/aob/mcx192⟩
- Accession number :
- edsair.doi.dedup.....38fca45a5fc0169e6ee1386265d07a7a