Question

Why does photorespiration not take place in c4 plants?

Answer 1

Photosynthesis in Higher Plants. ... In C4 plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of CO2 at the enzyme site and due to the kranz anatomy. The mesophyll cells lacks RuBisCo enzyme.

Answer 2

Because C4 plants employ a technique to increase the carbon dioxide content at the enzyme site, they do not undergo photorespiration.

• Photorespiration is the chemical process that takes place inside a living thing and involves the production of phosphoglycolate.
• It is catalysed by the enzyme RubisCO and prevents photosynthesis by getting in the way of RubisCO's ability to fix CO2.
• Similar to corn and sugarcane, plants that thrive in hot, arid areas have evolved a different mechanism for fixing carbon dioxide. They are known as C4 plants.
• These plants' leaves have a different structure from a typical leaf. They have a history of exhibiting Kranz anatomy.

• The bundle sheath cells release carbon dioxide as the mesophyll's C4 acid is broken down, increasing the intracellular carbon dioxide concentration.
• All Rubisco binds to carbon dioxide and does not bind to oxygen because to the high quantities of carbon dioxide in the plants.

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