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The Calvin Benson Cycle

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Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...

What is Photosynthesis?

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Photosynthesis is a multipart, biochemical process that occurs in plants as well as in some bacteria. It captures carbon dioxide and solar energy to produce glucose. Glucose stores chemical energy in the form of carbohydrates. The overall biochemical formula of photosynthesis is 6 CO2 + 6 H2O + Light energy → C6H12O6 + 6 O2. Photosynthesis releases oxygen into the atmosphere and is largely responsible for maintaining the Earth’s atmospheric oxygen content.

What is Photosynthesis?

What is Photosynthesis?

All living organisms on Earth are directly or indirectly dependent on photosynthesis. It is the only biological process that can capture energy from sunlight and convert it into chemical energy that every organism can use to power its metabolism. Photosynthesis is also the source of oxygen required by many living organisms.
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Photosystem I

Photosystem I

Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

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Author Spotlight: Innovative Approaches to Understanding Plant Structure-Function Relationships for Climate-Resilient Crops

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Published on: July 12, 2024

Improving photosynthesis in agricultural environments.

Matthew J Paul¹, G Mahendra Singh¹, Swati Puranik¹

¹Rothamsted Research, Harpenden, Herts, AL5 2JQ, UK.

Trends in Plant Science

|December 6, 2025

Summary

This summary is machine-generated.

Improving crop photosynthesis, especially in bread wheat, requires balancing resources and managing source-sink dynamics. Trehalose 6-phosphate (T6P) chemical intervention shows promise for increasing photosynthesis and yield by enhancing grain filling.

Keywords:

GM chemical intervention crop photosynthesis crop yield source–sink trehalose 6-phosphate

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Area of Science:

Agricultural Science
Plant Physiology
Crop Science

Background:

Increasing crop yields is crucial for global food security.
Photosynthesis is a key determinant of crop productivity.
Optimizing photosynthesis in crops like bread wheat (Triticum aestivum) is an active area of research.

Purpose of the Study:

To evaluate strategies for enhancing photosynthesis in crops.
To identify effective approaches for increasing crop yields through photosynthetic improvement.
To assess the potential of genetic and chemical interventions.

Main Methods:

Literature review and synthesis of current research on photosynthesis improvement.
Evaluation of strategies within the context of agricultural systems, considering resource limitations (water, nitrogen).
Analysis of source-sink dynamics and radiation use efficiency (RUE).

Main Results:

Photosynthetic improvement must be integrated with resource management and source-sink balancing.
Genetic modifications (GM) for photosynthesis require more field testing.
Trehalose 6-phosphate (T6P) chemical intervention demonstrated increased photosynthesis and yield by activating grain filling.

Conclusions:

A holistic approach balancing source (photosynthesis) and sink (grain filling) is essential for yield improvement.
Combined breeding and technological strategies offer the best prospects for enhancing crop photosynthesis and yield.
Further research and field validation are needed for genetic modification strategies.