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Follicle fruit usually dehisces
A. Along ventral suture
B. Along dorsal suture
C. Along both the sutures
D. Along with any one of the two sutures

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Last updated date: 01st Mar 2024
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Hint: A follicle is a dry unilocular fruit formed from one carpel, containing two or more seeds. It is usually defined as dehiscing by a suture in order to release seeds.

Complete answer:
Dehiscence is the breaking, at maturity, along a developed-in line of weakening in the structure of plants in order to expel its components. The follicle fruit is a dry, unilocular fruit formed of a single carpel, comprising two or more seeds. These are frequently defined as suture dehiscence in order to expel seeds. For example, Consolida, Peony. The single carpel grows into such a fruit (follicle) which typically breaks open (dehisces) forward along or both sides (dorsal and ventral sutures) at maturity and sheds the seeds some of which have formed from ovules. That simple follicle form is idealised in a pea or bean pod carrying two rows of slightly spaced ovules along the upper suture. But variation inside the family has adapted many follicle fruits in diverse situations, and they hold but the little similarity to bean or pea. The dorsal suture was its external suture of a pod or even other monocarpellary fruit which is really the midrib of carpellary leaves through which the fruit is produced. The path of fusion in which the boundaries of the megasporophyll are bound together to form the typical tubular shape of the ovary which can be seen in angiosperms. That is one of the first lines of vulnerability that dehiscence exists whenever the fruit is bloomed.
So, the correct answer is option (D).

Note: Indehiscent fruit doesn't always split at maturity in a pre-specified way, but rely on prey or decomposing to expel the seeds. Many, though not all, indehiscent fruits were included in the advanced phenotypic groups such as berry, pomegranate, samara. Structures which do not break in this manner are termed indehiscent and rely on certain mechanisms like decay or predation to unlock the contents.
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