HORTICULTURE

Detailed explanation-1: -Final answer: A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures, and has improved the efficiency of nitrogen utilization. This plant belongs to the C4 group.

Detailed explanation-2: -Photorespiration occurs usually when there is a high concentration of oxygen. Under such circumstances, RuBisCO, the enzyme that catalyzes the carboxylation of RuBP during the first step of the Calvin cycle, functions as an oxygenase. Some O2 does not bind itself to RuBisCO and hence CO2 fixation is decreased.

Detailed explanation-3: -In C4 plants, photorespiration does not occur because they have a mechanism that increases the concentration of CO2 at the enzyme site. This takes place when the C4 acid from the mesophyll is broken down in the bundle sheath cells to release CO2.

Detailed explanation-4: -Cellular respiration is a positive term which is very important for survival but photorespiration is a negative term because it leads to loss to the method of using light energy in photosynthetic organisms to fix carbon for subsequent carbohydrates.