Question

Explain how the pollination mechanism in salvia favors cross pollination.

Answer 1

• In Salvia, pollination is entomophilous i.e. it occurs by means of insects
• Pollination occurs by turn pipe mechanism.
• The flowers are bisexual but protandrous which means anther mature before stigma and hence, self pollination is prevented.
• Instead of four, there are two stamens having two theca each and separated by a long connective.
• The petals of Salvia are bifurcated. When an insect visits a flower and sits on the petals, the stamens are brought down to the touch the back of insect and pollen are laden on it.
• When the insect visits another flower, cross pollination occurs.