As the most important chemical reaction on Earth, photosynthesis is crucial for human survival and development. Despite over 200 years of research history, its intricate mechanisms remain shrouded in mystery. Scientists are dedicated to uncovering all the secrets of photosynthesis, as it is closely related to food security, environmental protection, and energy development.
Cycad plants, descendants of ancient plant groups, thrive in tropical and subtropical regions worldwide. Their photosynthesis mechanisms have remained unchanged for hundreds of millions of years, providing us with invaluable natural samples. Photosynthesis not only impacts agricultural production but also concerns the Earth's climate. With rising carbon dioxide levels, whether photosynthesis can mitigate the greenhouse effect has become a new research hotspot.
Photosynthesis consists of two stages: the light reactions and the dark reactions. In the light reactions, plants absorb carbon dioxide and release oxygen; in the dark reactions, energy is used to reduce carbon dioxide, forming high-energy glucose. This efficient mechanism is astonishing, with speeds and efficiencies far surpassing modern technology.
Scientists are exploring the evolutionary history of photosynthesis, attempting to unravel how it evolved from simple bacterial reactions into complex plant processes. Research indicates that the evolutionary path of photosynthesis is not singular but a fusion of multiple routes. This offers insights for humans to modify microorganisms and design new reactions.
Chinese scientists have made significant advancements in membrane protein research, successfully extracting the 3D structure of LHC-II, laying the groundwork for revealing the mechanisms of photosynthesis. In the future, humanity may be able to simulate photosynthesis to directly obtain food, but this requires more research and effort.
