**9. Conclusions and future perspective**

P has been widely known to play a crucial role in the dark phase of photosynthesis, particularly in the Calvin cycle. It is involved in the formation of essential molecules

*Role of Phosphorus in the Photosynthetic Dark Phase Biochemical Pathways DOI: http://dx.doi.org/10.5772/intechopen.112573*

like ATP, NADPH, and sugar phosphates, which are indispensable for the carbon fixation, reduction, and regeneration of RuBP. Additionally, phosphorus is involved in the regulation of key enzymes, such as RuBisCO, through the modulation of its activase. P-availability can directly impact the efficiency of the dark phase of photosynthesis, with P- deficiency leading to reduced photosynthetic rates and adaptive responses in plants. Understanding the role of P in the dark phase of photosynthesis is vital for improving crop productivity and developing sustainable agricultural practices. Future research should focus on identifying novel strategies to enhance P-use efficiency in plants, as well as exploring the potential interactions between phosphorus and other nutrients, such as N and K, in the regulation of photosynthetic processes.
