Question

Dimorphism of chloroplast is found in

• A. $C_4$ plants
• B. $C_3$ plants
• C. C A M plants
• D. All of the above

Answer 1

The correct option is A $C_4$ plants

The most distinct feature is presence of bundle sheath with chloroplasts in the leaves. It is like a wreath around the vascular bundle. Hence, such anatomy is called as Kranz anatomy. Bundle sheath may be single layered as in Maize or double layered as in sugarcane. If two layered, the outer one is green and the inner one is thick walled and called as mestome sheath. Mesophyll cell chloroplasts are granal and starch lacking but the bundle sheath cell chloroplasts are grana - lacking and starch - rich. Such feature is known as chloroplast dimorphism. Dimorphism of chloroplast is found in C${}_4$ plants and absent in $C_3$ and CAM plants. Thus, option A is correct and other options are incorrect.