Question

In some members of which of the following pairs of families, pollen grains retain their viability for months after release

• A. Rosaceae ; Leguminosae
• B. Poaceae ; Rosaceae
• C. Poaceae ; Leguminosae
• D. Poaceae ; Solanaceae

Answer 1

Answer: (A)

Rosaceae ; Leguminosae

Answer 2

Pollen grains, the male reproductive cells of plants responsible for fertilization, exhibit varying degrees of viability and longevity. Following their release from the anthers, they undergo dispersal, carried by the wind or other agents to reach the female reproductive structures of flowers. Notably, not all pollen grains share the same persistence. Some have a short lifespan, while others can endure for months, or even years. Among the given family pairs, Rosaceae and Leguminosae stand out for their pollen grains' exceptional durability.

Rosaceae: This family encompasses numerous economically significant plants, including apples, pears, cherries, strawberries, raspberries, and roses. Many Rosaceae species produce pollen grains with a robust exine layer, providing protection against environmental stresses and ensuring prolonged viability. For instance, the pollen grains of apple and pear can remain viable for up to six months.
Leguminosae: This family features many essential food crops like beans, peas, lentils, soybeans, and peanuts. The pollen grains of various Leguminosae species also possess a resilient exine layer, allowing them to maintain viability for extended periods. For example, soybean pollen grains can remain viable for up to ten months.

So, the correct option is (A): Rosaceae ; Leguminosae