During photosynthesis, CO2 and inorganic phosphate (Pi) are
converted to triose-P which is then metabolized primarily into
sucrose for transport and utilization by developing sink tissues. A
portion of the triose-P is retained in the chloroplast and utilized
for starch synthesis. An important and essential end result of these
carbohydrate biosynthetic processes is the recycling of Pi which
enables efficient production of ATP to continue by photophosphorylation
[1–3]. Limitations on the capacity for sucrose and starch
synthesis, or conditions where the potential for photosynthesis
exceeds the rate of end-product synthesis, retard Pi recycling and
induce a feedback response in net photosynthesis. Strong occurrence
of feedback on photosynthesis has been observed under CO2
and light saturating conditions and under current CO2 levels at
lower temperatures [4–6]. However, it is readily evident in tomato