Photosynthesis in non-foliar tissues: implications for yield

Area of Science:

• Plant Physiology
• Crop Science
• Photosynthesis Research

Background:

• Crop improvement efforts predominantly focus on leaf photosynthesis.
• The contribution of non-foliar photosynthetic tissues to overall plant carbon assimilation is often overlooked.
• Understanding non-foliar photosynthesis is crucial for optimizing crop productivity.

Purpose of the Study:

• To evaluate the impact of non-foliar photosynthesis on carbon-use efficiency and total plant assimilation.
• To review and summarize existing literature on non-foliar photosynthetic contributions in various plant types, particularly fruit and cereal crops.
• To explore the potential of non-foliar photosynthesis as a target for crop improvement.

Main Methods:

• Literature review and synthesis of past and current research on non-foliar photosynthesis.
• Analysis of the role of stomata in non-foliar gas exchange and temperature regulation.
• Examination of genetic manipulation studies, such as in Triticum aestivum (wheat), to assess impacts on yield.

Main Results:

• Non-leaf photosynthetic organs and tissues make a substantial contribution to plant productivity across diverse species.
• Evidence suggests non-leaf photosynthesis is an underutilized target for enhancing crop yields.
• Studies in wheat show increased ear assimilation and grain yield following genetic modification for enhanced leaf photosynthesis.

Conclusions:

• Non-foliar photosynthesis represents a significant, yet underexplored, resource for improving crop yields.
• Manipulating non-foliar photosynthesis and stomatal function presents novel targets for plant breeding programs.
• Further research into these processes can unlock new strategies for sustainable agriculture and food security.