Question

Temparature optimum for $C_3$ plants and optium temperature for $C_4$ plants

• A. $30-{40}^{o}C$
• B. $20-{25}^{o}C$
• C. Above ${40}^{0}C$
• D. None of these

Answer 1

Answer: (A)

$30-{40}^{o}C$

C4 plants require a higher temperature for photosynthesis than C3 plants. While C3 plants have a temperature optimum of 18-24${}^o$C, the optimum temperature for the C4 plants is 30-40${}^o$C.

So, the correct option is '30-40${}^o$C'.