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In What kind of plants do you come across 'Kranz anatomy'? To which conditions are those plants better adapted? How are these plants better adapted than the plants, which lack this anatomy?
BiologyPhotosynthesis in Higher Plants
Solution:
1038 Upvotes Verified Answer
Kranz anatomy how dimorphism in the chloroplast structure. It is found in $\mathrm{C}_4$ plants. The cells of leaves consists two types of chloroplast in them.
Granal Chloroplast is found in the mesophyll cells of leaves. Chloroplast have well developed grana in them. These chloroplast fixes $\mathrm{CO}_2$ effectively even if it is present in lower concentrations. PEP carboxylase fixes $\mathrm{CO}_2$ to form oxaloacetic acid ( 4 carbon compound).
Agranal Chloroplast is found in bundle sheath cells of the leaves. $\mathrm{C}_3$ cycle occurs in these cells in the presence of RuBisCoenzyme.
The $\mathrm{C}_4$ plants are well adapted to high $\mathrm{O}_2$ concentrations and high temperature.
$\mathrm{C}_4$ plants can absorb $\mathrm{CO}_2$ even when $\mathrm{CO}_2$ concentration in much low thus $\mathrm{C}_4$ plants can perform high rate of photosynthesis even the stomata are closed or there is the shortage of water thus, they can conserve water.
Since, PEP-carboxylase is insensitive to $\mathrm{O}_2$ thus excess $\mathrm{O}_2$ has inhibitory effect in $\mathrm{C}_4$ pathway and no photosynthesis occurs in $\mathrm{C}_4$ plant.
Thus, $\mathrm{C}_4$ plants are better adapted to tropical and desert (hot acid habitats) areas than the plants, that lack kranz anatomy.

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