Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

${\mathrm{C}}_4$ plants are those plants that produce ${\mathrm{C}}_4$ compound like malic acid or aspartic acid as the first stable compound of ${\mathrm{CO}}_2$ fixation cycle, eg. maize, sugar cane etc. These plants can grow in dense tropical, forests where there is poor supply of ${\mathrm{CO}}_2$ because there is internal supply of ${\mathrm{CO}}_2$. Also photorespiration is negligible or absent in these plants. So, they are photosynthetically more efficient than ${\mathrm{C}}_3$ plants. These plants show a special type of leaf anatomy called Kranz anatomy. ${\mathrm{C}}_4$ plants uses mesophyll cells and bundle sheath cells in the outer part of their leaves. The ${\mathrm{C}}_4$ pathway shows 2 carboxylation reactions one in mesophyll chloroplast and the other in bundle sheath. Chloroplasts $-{\mathrm{CO}}_2$ acceptor is PEP and not RuBP and PEP carboxylase is the key enzyme.