Tag: mineral nutrition in plants

Questions Related to mineral nutrition in plants

Match List I (nutrient) with List II(deficiency symptom in leaf) and select the correct answer using the codes given the lists.

List-I List-II
a. Phosphorus $1$. Lower leaves yellow between veins; purplish color of petiole
b. Potassium $2$. Discoloration of leaf, starting from margins and extending towards mid-rib
c. Manganese $3$. Dead tissues around the margins and in between the veins of the leaves
d. Calcium $4$. Development of chlorosis in patches in dicots and in stripes in monocots
biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. A-$1$, B-$2$, C-$3$, D-$4$

  2. A-$2$, B-$1$, C-$3$, D-$4$

  3. A-$1$, B-$2$, C-$4$, D-$3$

  4. A-$2$, B-$1$, C-$4$, D-$3$

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Correct Option: A

Choose the correct answer from the alternatives given.
The mineral element essential for nitrogen merabolisrn is:

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. Zn

  2. $Mn^{2+}$

  3. Mo

  4. $Al^{3+}$

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Correct Option: C
Explanation:

Mo is a cofactor for enzyme nitrogenase, which is the most crucial enzyme for nitrogen fixation.

So, the correct option is 'Mo'

The mineral nutrient mainly concerning with apical meristematic activity is _________.

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. K

  2. Ca

  3. N

  4. S

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Correct Option: A

Hydroponics or soilless culture helps in knowing _______________.

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. Essentiality of an element

  2. Deficiency symptoms caused by an element

  3. Toxicity caused by an element

  4. All of these

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Correct Option: D
Explanation:

Hydroponics or soilless culture helps to know the essentiality of mineral elements, deficiency symptoms developed due to non-availability of particular nutrient, toxicity to plant when element is present in excess, possible interaction among different elements present in plants and role of essential element in the metabolism of plant.

The technique of growing plants in a nutrient solution, in complete absence of soil is called as ___________.

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. Aeroponics

  2. Water culture

  3. Hydroponics

  4. Soil culture

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Correct Option: C
Explanation:

Cultivation of plants by placing the roots in the nutrient solution (in complete absence of soil) is called hydroponics. It is necessary to aerate the solution to provide roots with adequate oxygen supply. The result obtained from soil-less culture may then be used to determine deficiencies under field conditions.

Micronutrients are present in plant tissues in concentrations less than _______ of dry matter.

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. 1 m mole $Kg^{-1}$

  2. 10 m mole $Kg^{-1}$

  3. 0.1 m mole $Kg^{-1}$

  4. 2 m mole $Kg^{-1}$

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Correct Option: B

Role of inorganic nutrients in plant growth and metabolism was first discovered by

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. Knop

  2. Woodward

  3. De Sassure

  4. Steward

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Correct Option: A

Choose the correct answer from the alternatives given.
Heart rot of beet root is caused by the deficiency of:

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. B

  2. Fe

  3. Mg

  4. Zn

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Correct Option: A
Explanation:

Heart rot in beet root is a deficiency in the minor, nonmobile element Boron, $B$. It shows necrotic cross-hatching inside the leaf petiole. Young leaves turn brown and die, resulting in a rosette of small dead leaves at the top of the beet. In the fleshy root, internal and external black spots of necrotic tissue develop.

So the correct answer is "$B$".

Choose the correct answer from the alternatives given.
Phosphorus deficiency in plants causes.

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. premature leaf fall

  2. purple anthocyanin pigmentation

  3. older leaves exhibit deficiency symptoms first

  4. all of the above

Show answer
Correct Option: D
Explanation:

Phosphorus deficiency is a plant disorder associated with an insufficient supply of phosphorus. Darker green leaves and purplish or red pigment can indicate a deficiency in phosphorus. It is most common in lower leaves that are older. This condition is associated with the accumulation of sugars in P-deficient plants. Stems are thinner and leave acquire a leathery texture and tend to curl upwards, sometimes shedding prematurely. 

So the correct answer is "all of the above".

Minerals salts which are absorbed by the root from soil are in the form of

biology mineral nutrition in plants nutrients and nutrition essential and non-essential mineral elements transport in the xylem of plants

  1. Very dilute solution

  2. Dilute solution

  3. Concentrated solution

  4. Very concentrated solution

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Correct Option: A
Explanation:

Soil solution is very dilute $10^{-3}M$. It is in equilibrium with minerals adsorbed over colloidal particle.