Necrosis of tissue, particularly leaf tissue is due to deficiency of
A
N, K, Mg, Fe, Mn, Zn and Mo
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B
Ca, Mg, Cu and K
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C
N, K and S
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D
N, K, Mg and Fe
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E
Mn, Zn and Mo
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Solution
The correct option is B Ca, Mg, Cu and K
The
concentration of the essential element below which plant growth is retarded is
termed as critical concentration. The element is said to be deficient when
present below the critical concentration. Since each element has one or more
specific structural or functional role in plants, so plants certain morphological
changes in the limitation of any particular element. These externally visible
morphological change which are produced due to absence or deficiency of essential
mineral elements, are called deficiency symptoms. Necrosis is a common deficiency
symptom. It refers to the death of tissue, particularly leaf tissue. It is
caused by the deficiency of Ca, Mg, Cu and K.