Question

Define aestivation. Explain different types of aestivation.

Answer 1

hey mate!!
here is ur answer

ASTEVATION- it is the mode of arrangement of sepal and petal in a bud.
there are four types of astevation
1.twisted
2.vexillary
3.imbricate
4.valvate

hope it helps u✌️✌️

Answer 2

$\huge\text{\underline{Aestivation:}}$


The mode of arrangement of petals or sepals in a floral bud with respect to the other member of the same whorl is called aestivation.


$\text{\underline{It\:may\:be\:of\:following\:types:}}$

=> $\sf{\underline{Valvate}}$

=> $\sf{\underline{Twisted}}$

=> $\sf{\underline{Imbricate}}$

=> $\sf{\underline{Vexillary}}$


$\text{\underline{(i)\:Valvate:}}$

In valvate aestivation, the margin of sepals or petals, present in a whorl just touch each other.

There is no overlapping between the sepals or petals.

$\sf{\underline{Example:}}$ Calotropis.


$\text{\underline{(ii)\:Twisted:}}$

In twisted aestivation, margin of one petal or seal overlaps the margin of the adjacent successive petal or separate and so on.

$\sf{\underline{Example:}}$ China rose, lady's finger and cotton.


$\text{\underline{(iii)\:Imbricate:}}$

In imbricate aestivation, margin of petals or sepals overlaps each other but not in a particular direction.

$\sf{\underline{Example:}}$ Cassia, gulmohur.


$\text{\underline{(iv)\:Vexillary:}}$

In vexillary aestivation, the largest petal overlaps the two smaller lateral petals which in turn overlap the two smallest anterior petals.

$\sf{\underline{Example:}}$ Pea and bean flower.