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Shoot: root interrelationships in leeks infected with the rust, Puccinia allii Rud.: Growth and nutrient relations
1Plant Sciences Department, West of Scotland College, Auchincriuve, Nr Ayr, KA6 5HW, UK.
The New Phytologist
|April 20, 2021
Summary
Leek rust (Puccinia allii) infection significantly reduces plant growth and alters nutrient uptake. Infected plants show decreased nutrient content but increased mineral absorption rates, disrupting functional equilibrium.
Area of Science:
- Plant Pathology
- Plant Physiology
- Agricultural Science
Background:
- Plant diseases caused by rust fungi can significantly impact crop yield and quality.
- Understanding nutrient dynamics in infected plants is crucial for developing management strategies.
Purpose of the Study:
- To investigate the effects of Puccinia allii infection on leek growth and nutrient relations.
- To analyze how rust infection alters the shoot:root ratio and nutrient uptake in leeks.
Main Methods:
- Leeks were inoculated with Puccinia allii at varying intensities (10%, 20%, 30%) and compared to healthy controls.
- Plant dry weight, shoot:root ratios, and nutrient content (N, P, K, Ca) were measured over an 8-week period.
- Functional equilibrium analysis was used to assess nutrient uptake efficiency in infected and healthy plants.
Main Results:
- Rust infection substantially reduced leek dry weight compared to controls.
- Shoot:root ratios initially increased but were later reduced in infected plants.
- Nutrient content (N, P, K, Ca) decreased in rusted plants, while concentrations and specific absorption rates increased.
Conclusions:
- Puccinia allii infection significantly impacts leek physiology, reducing growth and altering nutrient acquisition.
- Rust infection disrupts the functional equilibrium of nutrient uptake in leeks.
- Further research into the mechanisms of these physiological changes is warranted.
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