Plant immunity: Good fences make good neighbors?

Plant immunity is modulated by several abiotic factors, and microbiome has emerged as a major biotic driver of plant resistance. Recently, few studies showed that plants also modify resistance to pests pathogens in their neighborhood. Several types neighborhood could be identified depending on the biological processes at play: intraspecific interspecific competition, kin stranger recognition, plant-soil feedbacks, danger signaling. This review highlights molecules exchanged aboveground belowground between can modulate immunity, either constitutively or after damage attack. An intriguing relationship allelopathy been evidenced should merit further investigation. Interestingly, most reported cases modulation neighbors are positive, opening new perspectives for understanding natural communities well design more diverse cultivated systems.