Question

flowers of salvia plant exibit protandry
Give reason​

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.