Which of the following seed testing methods assesses seed viability by artificially enhancing the age of the seeds?
Show Hint
- The Accelerated Aging Test is the gold standard for predicting the storability of seed lots (especially in crops like soybean).
- It helps seeds "grow old" in days rather than years, allowing breeders to evaluate their shelf life quickly.
- Tetrazolium test
- Grow out test
- Accelerated aging test
- EC test
The Correct Option is C
Solution and Explanation
Seed vigor and storage potential vary among different seed lots, even if they show similar initial germination percentages.
Seed vigor tests are used to estimate how well a seed lot will germinate and establish seedlings under stressful field conditions.
Step 3: Detailed Explanation:
Let us evaluate each of the seed tests listed:
- Accelerated Aging (AA) test: This test assesses seed vigor and storage potential by simulating rapid aging.
Seeds are placed in a chamber with high temperatures (\(41\text{--}45^{\circ}\text{C}\)) and near \(100%\) relative humidity for a short period (typically 48 to 72 hours).
This harsh environment accelerates the natural aging and deterioration processes in the seeds.
Following this treatment, the seeds are placed under optimal conditions for a standard germination test.
High-vigor seed lots can tolerate this stress and maintain a high germination percentage, whereas low-vigor seed lots show a significant drop in germination.
- Tetrazolium test (A): A rapid biochemical test that uses dye to detect active cellular respiration, indicating viability without aging the seeds.
- Grow-out test (B): Used to verify genetic purity, not vigor.
- EC (Electrical Conductivity) test (D): Measures the leakage of electrolytes from seed membranes into deionized water to assess membrane integrity.
Therefore, the accelerated aging test is the method that evaluates seeds by artificially enhancing their age.
Step 4: Final Answer:
The test that artificially ages seeds to assess viability is the Accelerated aging test, matching Option (C).
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Top ICAR AIEEA Seed Science Questions
- Which of the following groups of seeds represents the orthodox class of seeds?
The characteristic features of monocot seeds include-
• [(A).] Seeds germinate bearing a short axis called Plumule and Radicle.
• [(B).] Plumule and Radicle are enclosed in a sheath called Coleoptile and Coleorhiza, respectively.
• [(C).] The radicle grows downward and develops into the root system.
• [(D).] The cotyledon of the seeds of the monocot crop Sorghum (Jowar) is known as 'Husk'.
Choose the correct answer from the options given below:
Which of the following statements are INCORRECT about 'Enforced seed dormancy'?
• [(A).] Enforced seed dormancy occurs due to certain genetical and physiological factors.
• [(B).] Enforced seed dormancy is truly a specific character of the seeds.
• [(C).] High soil temperature and $NO_3$ content of the surface soil may help break the enforced seed dormancy.
• [(D).] Cultivation practices may also break the enforced seed dormancy by exposing the seeds to better aeration.
Choose the correct answer from the options given below:
- Match List-I with List-II
List-I: Seed Tests & List-II: Purpose
(A). Grow-out test & (I). Leachate discharge
(B). Tetrazolium test & (II). Seed coat permeability
(C). Electrical conductivity & (III). Seed purity
(D). Imbibition test & (IV). Seed viability
Choose the correct answer from the options given below: - Match List-I with List-II
List-I: Seed type & List-II: Examples
(A). Orthodox seed & (I). Coffee
(B). Recalcitrant seed & (II). Chickpea
(C). Impermeable seed coat & (III). Capsicum
(D). Hypogeal germination & (IV). Soybean (wild type)
Choose the correct answer from the options given below:
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