Question

Why do we use sucrose as the medium for pollen germination?

Answer 1

Hint: The germination of pollen is very important in plant reproduction. It leads to development of pollen tubes through which sperm nuclei is delivered for fertilisation inside the embryo sac. The stigma secretes sugary fluid for pollen germination.

Complete answer:
In nature, the pollen grain germinates on the compatible stigmas of the pistil. Stigma secretes a liquid that stimulates germination. Pollen grains may be induced to germinate in an exceedingly artificial medium.
Sucrose is employed as a pollination solution (Medium). Sucrose induces the spore germination & tube growth in vitro. Also, the outwardly provided disaccharide maintains the pressure level & acts as a substrate for spore metabolism. In vitro spore germination provides a completely unique approach and strategy to accelerate genetic improvement of tree breeding.

Additional Information: In vitro germination was performed in basic media as management, and in numerous concentrations of disaccharide (0, 10 and 15%), chemical element acid (0.01, 0.1 and 0.2%), and pH levels (4.5, 5 and 7). Spore germination rates and tube growth were recorded sporadically. The results showed that sucrose imposes vital effects on spore germination and tube growth. The consequences square measure most obvious at a concentration of V-J Day. chemical element acid considerably promoted germination and tube growth.
Sucrose, pH, and time of incubation were absolutely correlated, whereas chemical element acid negatively correlates with spore germination and tube growth.

Note: The pollen germinates due to the sugary secretion by the stigma. The viability of pollen is very important for the plants which breed through cross- pollination. Apart from sucrose, calcium is also an important factor for germination.