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sagar.arora1 asked this question on Class IX » Botany » Plant Anatomy

define different types of placentation in plants?

Asked by sagar.arora1(student), on 19/11/10
Answers

Hi User,

The different types of placentation found in plants are

  • Marginal placentation: The placenta forms a ridge along the ventral suture of the ovary and the ovules are borne on the ridge. Example: Peas
  • Axile placentation: The placenta is axial and the ovules are attached to the multilocular ovary. Example: China rose, lemon and orange. 
  • Parietal placentation: In this type of placentation, the ovules develop on the inner wall of the ovary. Ovary has a single chamber but appears to be double-chambered because of the formation of a false septum. Example: Mustard and argemone.
  • Free central placentation: The ovules are borne on the central axis. The septum is absent in this type of placentation. Example: Dianthus and primrose.
  • Basal placentation: In this type of placentation, the placenta is situated at the base of the ovary and a single ovule is attached to it. Example: Sunflower.

Hope this answers your question.

Cheers!!!

 
Posted by Meetu Misra(MeritNation Expert), on 20/11/10
This conversation is already closed by Expert

thank you mdm.

Q. Classify the fruit crops based on the edible parts ?. with figure explain?.

Posted by arunblc...(student), on 17/10/11

what is the superficial placentation in plants?

Posted by elink.bikram...(student), on 20/10/11

another placenta is also found its apical placentation where the placenta is found at the top

Posted by v.s.k.e.m.b...(student), on 12/11/11

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