Improving Crop Yield through Increasing Carbon Gain and Reducing Carbon Loss.

Area of Science:

• Plant Biology
• Biochemistry
• Agricultural Science

Background:

• Photosynthesis converts CO2 into carbohydrates, essential for plant productivity.
• Increasing global food demand necessitates enhanced crop yields.
• Improving leaf photosynthetic rates is crucial for further yield advancements.

Purpose of the Study:

• To review strategies for enhancing leaf photosynthesis.
• To identify and discuss promising approaches for improving plant productivity.

Main Methods:

• Optimization of Rubisco carboxylation efficiency through engineering Rubisco subunits, chaperones, and activase.
• Introduction of carbon-concentrating mechanisms (e.g., pyrenoids, carboxysomes) in C3 plants.
• Manipulation of photorespiratory bypasses to reduce carbon and nitrogen loss.

Main Results:

• Rubisco efficiency can be improved by targeting its components and activase.
• Carbon-concentrating mechanisms enhance CO2 levels around Rubisco.
• Photorespiration strategies aim to minimize fixed carbon loss.

Conclusions:

• Optimizing Rubisco, introducing carbon-concentrating mechanisms, and manipulating photorespiration are key strategies for enhancing photosynthesis.
• These approaches hold significant potential for improving crop yields to meet global food demands.