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The replum is present in the ovary of flower of:
A
sunflower
B
pea
C
lemon
D
mustard
Detailed Solution
The replum is a false septum that develops between the two parietal placentae of the ovary.
It is characteristic of the family Brassicaceae (Cruciferae), to which mustard belongs.
The gynoecium of mustard is bicarpellary and syncarpous with a superior ovary that is unilocular at first; it becomes bilocular due to the formation of the replum.
The fruit of mustard is a siliqua, in which the seeds remain attached to the replum after the two valves separate.
Sunflower (Asteraceae) has a unilocular ovary with basal placentation, pea (Fabaceae) has a monocarpellary ovary with marginal placentation, and lemon (Rutaceae) has a multilocular ovary with axile placentation; none of these has a replum.
So the replum is present in the ovary of mustard.
It is characteristic of the family Brassicaceae (Cruciferae), to which mustard belongs.
The gynoecium of mustard is bicarpellary and syncarpous with a superior ovary that is unilocular at first; it becomes bilocular due to the formation of the replum.
The fruit of mustard is a siliqua, in which the seeds remain attached to the replum after the two valves separate.
Sunflower (Asteraceae) has a unilocular ovary with basal placentation, pea (Fabaceae) has a monocarpellary ovary with marginal placentation, and lemon (Rutaceae) has a multilocular ovary with axile placentation; none of these has a replum.
So the replum is present in the ovary of mustard.