Question

Which one is false about Kranz anatomy?
A. Bundle sheath has large chloroplast and less developed grana.
B. Mesophyll cells have large chloroplasts.
C. It is found in atriplex, sugarcane, maize.
D. Plant having it has better photosynthesizing power than C3 plants.

Answer 1

Kranz anatomy may be defined as clear concentric layers of chlorenchyma cells, shaped via way of means of a package sheath containing maximum of the chloroplasts, surrounded via an outer layer including a small range of mesophyll cells. Mesophyll cells shape concentric circles across the vasculature.

Complete answer:
To answer this question, first, we need to know about the Kranz anatomy. The phrase Kranz means “wreath” or “ring”. Kranz anatomy is a specialised shape in C4 Plants in which the mesophyll cells are clustered across the pack sheath cells in a ring-like structure. The quantity of chloroplasts inside the pack sheath cells is greater than that inside the mesophyll cells. This is observed in C4 grasses including maize and some dicots. The Kranz anatomy is growth in 3 special steps:
In the primary steps Initiation of procambium.
Second step the pack or bundle sheath and mesophyll cell specification.
At last, the chloroplast improvement and integration of the C4 cycle.
Now, let us find the solution from the option.
In C4 plants, the vascular bundles in leaves are surrounded with the aid of using a clear pack sheath of radially enlarged parenchyma cells. The Chloroplasts in leaves are dimorphic: granal and agranal chloroplasts.
In C4 plants the chloroplasts with inside the mesophyll cells are smaller and consists of grana and chloroplasts with inside the pack sheath cells are large and without grana.
Kranz anatomy is a feature of C4​plants like Atriplex, Sugarcane and Maize.
C4​plants are higher photosynthesizers than C3​plants, as they do not perform photorespiration.

Hence, the correct answer is option(B).

Note: Kranz anatomy has a unique shape withinside the leaves of plants which have a C4 pathway of carbon dioxide fixation. The leaves incorporate a hoop of mesophyll cells, containing some small chloroplasts involved with the preliminary fixation of carbon dioxide, surrounding a sheath of parenchyma cells (the pack sheath) which has massive chloroplasts concerned in the Calvin cycle.