ABS76416

Elevated Atmospheric Carbon Dioxide Alters Plant Programmed Cell Death Sensitivity Thresholds


  • Oral Presentation
  • Plant Growth and Development
  • 13 Jun 2018 10:20
  • FS-G01, UCD Agriculture and food science Centre
  • View all IPSAM abstracts

John Conway*
UCD School of Biology & Environmental Science

Paul McCabe
UCD School of Biology & Environmental Science

*Presenting Author


According to a recent IPCC report atmospheric carbon dioxide may rise from the current level of nearly 400ppm to 1000ppm by the year 2100. Given that carbon assimilation is the main biological plant process, extensive research has been undertaken to examine the impacts, risks and vulnerabilities of plant systems to elevated atmospheric carbon dioxide. This research introduces a new risk consideration to this field of study. A combination of novel and standard techniques is used to show that elevated carbon dioxide alters programmed cell death (PCD) sensitivity thresholds. PCD is a form of cellular suicide which eliminates unwanted or dying cells. Dysfunctional PCD negatively impacts plant reproductive processes and plant resistance to biotic and abiotic stress. Understanding the mechanisms behind changes in plant PCD resulting from rising CO2 will allow for better interpretation of data and ultimately function to aid development of mitigation and adaptation strategies against rising CO2, thereby helping protect crop yields and strengthening food security.