Pollen Viability, Definition, Factors, and Importance for NEET Exam

Pollen viability refers to the ability of pollen grains to perform their biological function of fertilizing an ovule. This is an important concept in plant reproduction, as only viable pollen can successfully fertilize the female gamete and produce seeds. Pollen viability varies among different plant species and is influenced by several environmental and genetic factors. This topic is essential for students preparing for competitive exams, especially important for the NEET exam .

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Definition of Pollen Viability

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Factors Affecting Pollen Viability

• Environmental Conditions: Temperature and humidity greatly impact pollen viability. Extreme heat or moisture can reduce the lifespan of pollen grains.
• Genetic Traits: The genetic makeup of a plant species plays a key role in determining the longevity of its pollen. Some plants naturally produce pollen that stays viable for longer periods.
• Storage Conditions: When pollen is stored for artificial fertilization, factors like freezing temperatures or special chemical treatments can extend its viability.
• Maturity of Pollen Grains : Immature or over-mature pollen grains are less viable compared to properly matured ones.
• Stigma Compatibility: For pollen to remain viable, it needs a compatible stigma. An incompatible stigma may lead to pollen failure even if it is viable.

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• Free Toppers Notes for NEET
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• NEET Study Material, Free Sample Papers, Book, Toppers Notes, PYQs

Importance of Pollen Viability in Plant Reproduction

• Only viable pollen can germinate and grow a pollen tube, which helps deliver the male gametes to the ovule.
• In plant breeding, the viability of pollen is essential for creating hybrids with desirable traits.
• In agricultural crops, high pollen viability ensures better fertilization, leading to increased seed and fruit production.

MCQs of Pollen Viability

Q1. Viability of pollen grains depends on;

1. Prevailing temperature
2. A particular species
3. Humidity
4. All of these

Q2. In pollen viability, what does the term “viability” refer to?

1. The ability to cause allergies.
2. The ability to germinate and fertilize.
3. Resistance to environmental factors.
4. The color of the pollen graint.

Q3. Which environmental factor can affect pollen viability?

1. High humidity
2. Low temperature
3. Strong winds
4. All of these

Answers of MCQs of Pollen Viability