Summary
This systematic review critically evaluates the contested evidence base for plant kin recognition—the putative ability of plants to distinguish relatives from non-relatives and adjust competitive or cooperative responses accordingly. The authors synthesise behavioural and physiological evidence, explore potential belowground signalling mechanisms, and discuss implications for crop management, whilst concluding that consistent and definitive evidence remains limited due to significant experimental variability and methodological heterogeneity across the literature.
UK applicability
The findings are relevant to UK agricultural research and crop management strategy, particularly for understanding plant-plant interactions in intensive and mixed farming systems. However, the review's conclusion that evidence remains inconclusive means practitioners should exercise caution in applying kin recognition principles to UK crop management until standardised methodologies provide clearer mechanistic understanding.
Key measures
Behavioural responses (competitive or cooperative interactions), physiological indicators, belowground signalling pathways, experimental methodology assessment, consistency of evidence across studies
Outcomes reported
The review synthesised behavioural and physiological evidence for plant kin recognition across multiple studies, examining belowground signalling pathways and their potential role in mediating kin-versus-non-kin discrimination. It identified inconsistencies in experimental findings and methodological limitations constraining definitive conclusions about the ecological and agricultural significance of kin recognition in crop systems.
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