Reproduction begins when one of the pollen grains from inside a pollen sac on the male cone floats through the air to the scale of a female cone A pollen tube then grows from the pollen grain toward the female ovule Sperm cells move through the pollen tube and one of them fertilizes an egg cell, which then develops into a seed Apomixis (asexual seed formation) is the result of a plant gaining the ability to bypass the most fundamental aspects of sexual reproduction meiosis and fertilization Without the need for male fertilization, the resulting seed germinates a plant that develops as a maternal clone This dramatic shift in reproductive process has been documented in many flowering plantClonal reproduction through seeds can therefore be achieved in a sexual plant by manipulating two to four conserved genes (A) In natural apomixis, clonal seeds
Reproduction In Plants 5th Std Science Cbse Board Home Revise Youtube
