Question

explain five physiological effects of auxin​

Answer 1

The primary physiological effect of auxin in plants is to stimulate the elongation of cells in shoot. The higher concentration of auxin on the shaded side causes the cells on that side to elongate more rapidly resulting in bending of the stem tip towards the unilateral light. ...

Answer 2

AnSwer :

${ \large{ \sf \orange {(1) \: } { \orange{ \underline{ \underline{ Cell \: division \: and \: cell \: elongation}} : }}}}$

Auxin induces the rapid cell division and elongation by increasing the osmotic solutes of the cells increasing the permeability of cells to water and by reducing the wall pressure etc.

${ \large{ \sf \orange {(2) \: } { \orange{ \underline{ \underline{ Apical \: dominance}} : }}}}$

• Apical bud of the plant inhibits (suppress) the growth of the lateral bud. It is called apical dominance.

• Auxin produced by the apical bud translocation downwards (basipetally) and suppress the expression of the lateral bud.

• If apical bud is removed, plants produces profuse branching due to the growth of the lateral bud.

${ \large{ \sf \orange {(3) \: } { \orange{ \underline{ \underline{Root \: initiation}} : }}}}$

High concentration of auxin inhibits the enlongation of roots but initiates the more lateral branches of roots.

${ \large{ \sf \orange {(4) \: } { \orange{ \underline{ \underline{Inhibition \: of \: abscission}} : }}}}$

When quantity of auxin is high, that prevent the formation of abscission layers; where as less quantity of auxins induces the formation of abscission layer.

${ \large{ \sf \orange {(5) \: } { \orange{ \underline{ \underline{Wound \: healing \: hormone}} : }}}}$

Traumatic acid or traumation is wound healing hormone induces the cell division in area injury.

${ \large{ \sf \orange {(6) \: } { \orange{ \underline{ \underline{Development \: of \: parthenocarpic \: fruit}} : } } } }$

High concentration of the auxin in the induces the production of parthenocarpic fruits in commercially important plants.