Question

Gynobasic style is found in______.
A. Labiatae/ Lamiaceae
B. Liliaceae
C. Gramineae/ Poaceae
D. Compositae/ Asteraceae

Answer 1

As we are well aware that the style of a flower is the long and slender stalk that connects the stigma and the ovary of the flower and together they make the female reproductive organ called pistil. And gynobasic style is when the ovary is lobed and the style emerges from the base of these lobes.

Complete answer:
We know that the style of a flower is the long and slender stalk that connects the stigma and the ovary of the flower and together they make the female reproductive organ called pistil.
Stigma is the head of the pistil which receives the pollen grains that would begin the fertilisation process by forming a pollen tube through the style reaching to the ovary where pollen grains fertilize the eggs or ovules which will eventually grow into a seed.
Now comes the gynobasic style which is the condition when the ovary is lobed and the style emerges from the mid basal part of these lobes. It is mainly found in the mint or Labiatae/ Lamiaceae family which are mostly aromatic herbs like Salvia and Ocimum.

Therefore, the correct answer is (A).

Note:
The Labiatae family of plants is particularly important for humans because these herbs are very useful for flavour, fragrance as well as for medicinal purposes. For example: Rosemary and Lavender have fragrant properties, Thyme is a kitchen herb and Betony as well as Prunella are considered as medicinal plants.
Styles of a flower not only provide the space for pollen tube formation but also reject the incompatible pollen grains from entering or penetrating the ovary by producing a toxin to prevent the growth of pollen tube.