Question

photosynthesis in c4 plant why we use phosphoenolpyruvate not other???​

Answer 1

Answer:

Plants also lose water vapor through their stomata, which means that they can die from dehydration in dry conditions as they keep their stomata open for photosynthesis. ... C4 plants use this 4-carbon compound to effectively “concentrate” CO2 around rubisco, so that rubisco is less likely re react with O2.

Explanation:

Phosphoenolpyruvate carboxylase (PEPC; EC 4.1.1.31) plays a key role during C4photosynthesis and is involved in anaplerotic metabolism, pH regulation, and stomatal opening. Heterozygous (Pp) and homozygous (pp) forms of a PEPC-deficient mutant of the C4 dicot Amaranthus edulis were used to study the effect of reduced PEPC activity on CO2assimilation rates, stomatal conductance, and 13CO2 (Δ13C) and C18OO (Δ18O) isotope discrimination during leaf gas exchange. PEPC activity was reduced to 42% and 3% and the rates of CO2 assimilation in air dropped to 78% and 10% of the wild-type values in the Pp and pp mutants, respectively. Stomatal conductance in air (531 μbar CO2) was similar in the wild-type and Pp mutant but the pp mutant had only 41% of the wild-type steady-state conductance under white light and the stomata opened more slowly in response to increased light or reduced CO2 partial pressure, suggesting that the C4 PEPC isoform plays an essential role in stomatal opening. 

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Answer 2

Answer:

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