C_4 plants are less efficient at low temperat | vedclass

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(B) $C_4$ plants are adapted to high-temperature environments and have an optimum temperature range of $30-40^{\circ}C$. At low temperatures,the enzym

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Cold sensitivity of $PEP$ synthetase enzyme

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(B) $C_4$ plants are adapted to high-temperature environments and have an optimum temperature range of $30-40^{\circ}C$. At low temperatures,the enzyme $PEP$ synthetase (pyruvate phosphate dikinase),which is responsible for regenerating $PEP$ (phosphoenolpyruvate),becomes cold-sensitive and its activity decreases significantly. This inhibition of the $PEP$ regeneration cycle limits the overall rate of $CO_2$ fixation in $C_4$ plants,making them less efficient compared to $C_3$ plants in cooler climates.

$C_4$ plants are less efficient at low temperatures due to:

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