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Short-Term Waterlogging in Citrus Rootstocks
Margarita Pérez-Jiménez1, Olaya Pérez-Tornero1
1Equipo de Mejora Genética de Cítricos, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), 30150 Murcia, Spain.
Plants (Basel, Switzerland)
|December 28, 2021
Summary
Citrus rootstocks show varying tolerance to field waterlogging.
Area of Science:
- Agricultural Science
- Plant Physiology
- Climate Change Adaptation
Background:
- Climate change is increasing the frequency of extreme weather events like flooding.
- Waterlogging in agricultural fields poses a significant threat to crop yields, particularly for sensitive species like citrus.
- Developing climate-resilient citrus varieties through rootstock improvement is crucial for food security.
Purpose of the Study:
- To evaluate the physiological responses of three commercial citrus rootstocks to short-term waterlogging.
- To assess the recovery potential of these rootstocks after waterlogging stress.
- To identify rootstock traits associated with enhanced tolerance to flooding conditions.
Main Methods:
- Three citrus rootstocks ('Cleopatra', *C. macrophylla*, and 'Forner Alcaide no. 5') were subjected to controlled waterlogging.
- Physiological parameters including photosynthesis rate, stomatal conductance, relative water content, and chlorophyll levels were measured.
- Plants were monitored during the waterlogging period and a subsequent 7-day recovery phase.
Main Results:
- 'Cleopatra' rootstock exhibited significant decreases in photosynthesis, stomatal conductance, relative water content, and chlorophyll.
- *C. macrophylla* maintained photosynthesis and stomatal conductance during waterlogging.
- 'Forner Alcaide no. 5' showed recovery of physiological parameters after the waterlogging period, unlike 'Cleopatra'.
Conclusions:
- Citrus rootstock 'Cleopatra' is more susceptible to waterlogging stress, with sustained negative impacts even after recovery.
- *C. macrophylla* and 'Forner Alcaide no. 5' demonstrate greater resilience and recovery potential, making them promising candidates for breeding programs.
- Genetic improvement of citrus rootstocks is essential for adapting agriculture to changing climatic conditions and mitigating flood impacts.
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