Articles
A MODEL APPROACH TO DESCRIBE THE EFFECT OF ROOT PATHOGENS ON PLANT GROWTH AND YIELD
Article number
548_26
Pages
235 – 242
Language
English
Abstract
An approach is introduced to describe the effect of root pathogens on plant growth and yield.
As a part of this approach, a simplified submodel is presented of tomato root growth as affected by Pythium aphanidermatum infection and root zone temperature.
Simulation studies using the model showed that root zone temperature has a great influence on root disease.
Following the simulations, within a temperature range of about 3 K the state of a tomato plant changed from a good tolerance of the root disease to a total infected one, nearly losing all roots.
Most sensitive model parameters are the relative growth rate and the average life time of the pathogen, while simulation results are robust against variations of the root growth parameters.
As a part of this approach, a simplified submodel is presented of tomato root growth as affected by Pythium aphanidermatum infection and root zone temperature.
Simulation studies using the model showed that root zone temperature has a great influence on root disease.
Following the simulations, within a temperature range of about 3 K the state of a tomato plant changed from a good tolerance of the root disease to a total infected one, nearly losing all roots.
Most sensitive model parameters are the relative growth rate and the average life time of the pathogen, while simulation results are robust against variations of the root growth parameters.
Authors
H.P. Kläring, R. Grosch, D. Schwarz, E. Nederhoff
Keywords
Lycopersicon esculentum, Pythium aphanidermatum, root length, tomato
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