Advertisements
Advertisements
Question
Add a note on pollination mechanism in Salvia.
Solution
Pollination mechanism in Salvia:
i. In Salvia, flower is bisexual and protandrous, i.e. anthers mature earlier than stigma.
ii. The two stamens of flower have long bifurcated connective.
iii. Upper branch of connective bears fertile anther lobe, while lower has sterile anther lobe.
iv. When an insect enters the flower, it pushes the lower sterile lobes. As a result, the upper fertile anther lobe bends down.
v. The fertile anther lobe comes in contact with back side of insect body and pollen grains are dusted there.
vi. When the same insect visits another flower with matured gynoecium, the pollen grains are picked up
by the receptive stigma.
vii. This mechanism is called lever-mechanism or turn-pipe mechanism.
APPEARS IN
RELATED QUESTIONS
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure (s) that shall ensure cross – pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each of the item.
Why angiosperm anthers are called dithecous?
Fill in the blanks:
The two kinds of pollination are __________ and __________.
In bisexual flowers, maturation of gynoecium before androecium is known as ______.
Differentiate between geitonogamy and xenogamy.
Name the two types of pollination.
Plants with ovaries having only one or a few ovules are generally pollinated by ______.
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
Which type of flower has ovary superior?
The flower which does not open at all are called ______.
