Photosynthetic re-absorption of photorespired CO(2) causes underestimation in measured photorespiration and turnover rate of the substrate for photorespiration. Actual values of photorespiration exceed the measured by a factor greater than 1 + R'(w)/r(p) + [C(L)](x)/(r(p).L(x)). (R'(w) and r(p) are the partial resistances to CO(2) uptake between atmosphere, mesophyll evaporating surface, and ph...

The results of the numerous measurements obtained during the last 40 years on gas exchange rate, photosynthetic carbon metabolism by exposition in ¹⁴CO₂ and activities of primary carbon fixation enzyme, ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPC/O), in various wheat and soybean genotypes grown over a wide area in the field and contrasting in photosynthetic traits and productivity ar...

Photorespiration is an energy-intensive process that recycles 2-phosphoglycolate, a toxic product of the Rubisco oxygenation reaction. The photorespiratory pathway is highly compartmentalized, involving the chloroplast, peroxisome, cytosol, and mitochondria. Though the soluble enzymes involved in photorespiration are well characterized, very few membrane transporters involved in photorespiratio...

Improving photosynthesis has become a strategy to increase plant productivity. Current photosynthetic targets dealing with light and CO2 capture will be briefly described major breakthroughs photoprotection kinetics, CO2-concentrating mechanisms, ribulose-1,5-bisphosphate regeneration highlighted before focusing on photorespiration. This metabolic process occurs when carboxylase/oxygenase, the ...

Oxygen recycling inside photosynthesizing leaves was found to amount to less than 0.3% of the oxygen consumed by photorespiration under natural conditions, provided the influence of buildup of oxygen released by photosynthesis into the external air was taken into consideration. When this is related to the amounts of photorespired CO(2), which had been previously found to be reabsorbed by photos...

Leaves of 10 plant species, 7 with photorespiration (spinach, sunflower, tobacco, pea, wheat, bean, and Swiss chard) and 3 without photorespiration (corn, sugarcane, and pigweed), were surveyed for peroxisomes. The distribution pattern for glycolate oxidase, glyoxylate reductase, catalase, and part of the malate dehydrogenase indicated that these enzymes exist together in this organelle. The pe...

Photorespiration results in a large amount of leaf photosynthesis consumption. However, there are few studies on the response photorespiration to multi-factors. In this study, machine learning model for rate cucumber leaves’ multi-factors was established. It provides theoretical basis related photorespiration. Machine models different methods were designed and compared. The expressed as differe...