pollination takes place on the stigma in flowering plants.
pollination takes place on the stigma in flowering plants.
where does pollination take place in flowering plants?
on the stigma
another germination event during the life cycle of gymnosperms and flowering plants is the germination of a pollen grain after pollination. like seeds, pollen grains are severely dehydrated before being released to facilitate their dispersal from one plant to another. they consist of a protective coat containing several cells (up to 8 in gymnosperms, 2-3 in flowering plants). one of these cells is a tube cell. once the pollen grain lands on the stigma of a receptive flower (or a female cone in gymnosperms), it takes up water and germinates. pollen germination is facilitated by hydration on the stigma, as well as by the structure and physiology of the stigma and style. pollen can also be induced to germinate "in vitro" (in a petri dish or test tube).
germination
palynivores are essential to spreading the genes of flowering plants via the use of pollen which is the vector for genetic diversity in these plants. while wind and other natural resources can help in the process of spreading pollen, they are not specific and do not provide as direct a service as palynivores who although they eat the pollen also work to move the pollen from one plant to another thereby participating in pollination services. over the past decade, there has been a decline in palynivore species worldwide that has had drastic consequences for flowering plants. as the palynivore population decreases, so do the pollination services they provide. this in turn lowers the reproductive success of flowering plants and causes an overall decline in the population of flowering plants and the number of species of flowering plants.
palynivore