Advertisements
Advertisements
Question
All elements that are present in a plant need not be essential to its survival’. Comment.
Advertisements
Solution 1
Most of the mineral elements present in the soil enter plants through roots but all of these may not be essential for their survival. Some are absorbed and accumulated by plant only because they are present in excess amount. For example plants growing near nuclear test sites take up strontium, even though it is not required by them. Thus, an essential element is that which is necessary for supporting normal growth and reproduction, its requirement must be specific i.e. its deficiency cannot be met by supplying other element and it must be directly involved in the metabolism of plant
Solution 2
Plants tend to absorb different kinds of nutrients from soil. However, a nutrient is inessential for a plant if it is not involved in the plant’s physiology and metabolism. For example, plants growing near radioactive sites tend to accumulate radioactive metals. Similarly, gold and selenium get accumulated in plants growing near mining sites. However, this does not mean that radioactive metals, gold, or selenium are essential nutrients for the survival of these plants
APPEARS IN
RELATED QUESTIONS
Given statement are true? If false, correct them - Every mineral element that is present in a cell is needed by the cell.
Given statement are true? If false, correct them: - Nitrogen as a nutrient element, is highly immobile in the plants.
Given statement are true? If false, correct them: - It is very easy to establish the essentiality of micronutrients because they are required only in trace quantities.
Why Chl-a (Chlorophyll-a) is Called Essential Pigment?
Short Answer Question:
Enlist the role and deficiency symptoms of Nitrogen.
Short Answer Question:
Enlist the role and deficiency symptoms of Phosphorus.
Short Answer Question:
Enlist the role and deficiency symptoms of Potassium.
The disease related with deficiency of Molybdenum is ____________.
Cell walls become brittle due to lack of ____________ elements.
Which one of the following elements is an important binding agent in ribosomes during protein synthesis?
Carnivorous plants like Nepenthes and Venus fly trap have nutritional adaptations. Which nutrient do they especially obtain and from where?
Name an insectivorous angiosperm.
Abscission means ______.
Complete the following box with reference to symptoms of mineral deficiency:
| Abscission | Pre-mature fall of flowers, fruits and leaves |
| ______ | Appearance of green and non-green patches on leaves |
Enlist role and deficiency symptoms of Calcium.
Give observed symptom when the following mineral are deficient.
Deficiency of Bo
Give observed symptom when the following mineral are deficient.
Deficiency of K
Match the following:
| Column 'A' | Column 'B' (Symptoms observed) |
||
| (1) | Deficiency of Cu | (a) | Malformed leaves |
| (2) | Deficiency of B | (b) | Leaves with yellow edges |
| (3) | Deficiency of Zn | (c) | Brown heart disease |
| (4) | Deficiency of K | (d) | Die back of shoot |
