Volatile isoprenoid emissions from plastid to planet

Area of Science:

• Biogeochemistry
• Plant Physiology
• Atmospheric Chemistry

Background:

• Land plants emit 1-2% of net primary production as volatile isoprenoids (isoprene, monoterpenes).
• These emissions significantly influence atmospheric chemistry, air pollution, and climate interactions.
• Current models face uncertainties due to limited understanding of emission regulation.

Purpose of the Study:

• To synthesize recent advances in plant physiology and atmospheric science.
• To propose a conceptual model for volatile isoprenoid emission regulation.
• To provide a foundation for improved global-scale emission modeling.

Main Methods:

• Literature synthesis across diverse fields (cell physiology, remote sensing).
• Development of a conceptual model based on chloroplast metabolic regulation.
• Integration of cellular-level understanding for global scaling.

Main Results:

• A novel conceptual model for volatile isoprenoid emission regulation is proposed.
• The model links metabolic regulation within the chloroplast to emission rates.
• It offers a framework for more accurate predictions of plant emissions.

Conclusions:

• Understanding chloroplast metabolism is key to regulating plant volatile isoprenoid emissions.
• The proposed model can reduce uncertainties in air quality and climate projections.
• This approach facilitates robust scaling from cellular to global emission estimates.