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Kin recognition in rice (Oryza sativa) lines.
Xue-Fang Yang1, Lei-Lei Li1, You Xu1
1Beijing Key Laboratory of Biodiversity and Organic Farming, College of Resources and Environmental Sciences, China Agricultural University, Beijing, 100193, China.
The New Phytologist
|June 30, 2018
Summary
Rice plants exhibit kin recognition, altering root growth and biomass allocation to favor kin. This ability, mediated by root exudates like allantoin, can enhance grain yield in cultivar mixtures.
Area of Science:
- Plant Biology
- Agricultural Science
- Behavioral Ecology
Background:
- Kin recognition is crucial for social interactions in many species.
- Evidence for kin recognition in natural plant populations is growing, but less is known about crop species.
- Artificial selection in crops may have influenced kin recognition abilities.
Purpose of the Study:
- To identify rice (Oryza sativa) cultivars capable of kin recognition.
- To assess how rice cultivars respond to kin versus nonkin.
- To investigate the mechanisms underlying kin recognition in rice.
Main Methods:
- Controlled experiments and field trials were conducted with indica-inbred and indica-hybrid rice lines.
- Root behavior, biomass allocation, and grain yield were measured in the presence of kin and nonkin.
- Root exudates were analyzed to identify potential chemical cues for kin recognition.
Main Results:
- Rice cultivars demonstrated the ability to distinguish between kin and nonkin.
- Responses included altered root behavior and biomass allocation, with significant impacts on grain yield.
- A nitrogen-rich root exudate, allantoin, was identified as a key component in rice kin recognition.
Conclusions:
- Kin recognition in rice is cultivar-dependent and mediated by root exudates.
- This ability can lead to increased grain yield when rice cultivars are grown with kin.
- Cultivar mixtures leveraging kin recognition offer potential applications for improving rice production.
Keywords:
allantoinbelowground segregationcultivar mixturesgenetic relatednessgrain yieldroot exudatesMore Related Videos
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