Difference Between Operculum and Peristome

Operculum is a lid or cap-like structure that covers the opening of capsule or spore-bearing structure. In contrast, peristome is a ring of tooth-like appendages that surrounds the mouth of a capsule or spore-bearing structures of plants, mosses and fungi.

1. What is the function of Peristome?
2. What is the difference between a Calyptra and an Operculum?
3. How do Peristome teeth move?
4. What is Operculum in plants?
5. What is Epicranoid Peristome?
6. What is the function of the foot in liverwort Sporophytes?
7. What is Funaria Operculum?
8. What is Operculum in biology?
9. Is Operculum haploid or diploid?
10. Which generation in the life cycle of ferns lack vascular tissue?
11. What is the life cycle of moss?
12. Does the Protonema contain any structures?

What is the function of Peristome?

In mosses, the peristome is a specialized structure in the sporangium that allows for gradual spore discharge, instead of releasing them all at once. Most mosses produce a capsule with a lid (the operculum) which falls off when the spores inside are mature and thus ready to be dispersed.

What is the difference between a Calyptra and an Operculum?

In mosses plant calyptra is a cup shaped structure which is formed from the archegonium. ... Whereas the operculum is an apical portion of the moss capsule which is also a cup shaped structure. The operculum is also known as the lid of the capsule and is the terminal end of the capsule.

How do Peristome teeth move?

Peristome teeth move backward and forward in response to changes in humidity assisting in spore release from the capsule. Plagiomnium novae-zealandiae -When humidity is high, the peristome teeth more inward and close over the capsule mouth.

What is Operculum in plants?

In flowering plants, the operculum, also known as a calyptra, is the cap-like covering or "lid" of the flower or fruit that detaches at maturity. ... In those species that lack an outer operculum, there is no bud scar. The inner operculum is shed just before flowering, when the stamens expand and shed their pollen.

What is Epicranoid Peristome?

What is epicranoid peristome? Ans. In this type, there are two rings of peristome teeth—an inner endostome and outer exostome. The endostome is a more delicate membrane, and its teeth are overlapped by the teeth of the exostome.

What is the function of the foot in liverwort Sporophytes?

At the bottom of the bryophyte sporophyte is the foot. It is the region where the un-branched sporophyte is physically attached to the leafy gametophyte. The foot functions in the transfer of nutrients from the maternal, leafy gametophyte to the sporophyte.

What is Funaria Operculum?

The uppermost lid or cap-like region of the capsule is the operculum (Fig 202), which helps in the dehiscence of capsule and dispersal of spores.

What is Operculum in biology?

In biology, an operculum can refer to slightly different things, depending on the organism in question, but in all cases, it is a specialized type of covering that usually protects a sensitive body part. ... In plants, an operculum is a flap of some type found on algae, fungi, or vascular plants.

Is Operculum haploid or diploid?

Question: Is operculum haploid or diploid? Answer: Operculum is the diploid part of the sporophyte.

Which generation in the life cycle of ferns lack vascular tissue?

The fern gametophyte is a small (approximately 5 mm), bisexual, heart-shaped plant called a prothallus. The prothallus is haploid, since it grew from a spore which had been formed by meiosis. It does not have any vascular tissue and uses small rhizoids to anchor it to the ground.

What is the life cycle of moss?

The life cycle of a moss, like all plants, is characterized by an alternation of generations. A diploid generation, called the sporophyte, follows a haploid generation, called the gametophyte, which is in turn followed by the next sporophyte generation.

Does the Protonema contain any structures?

Moss spores germinate to form an alga-like filamentous structure called the protonema. ... These give rise to gametophores, stems and leaf like structures. Bryophytes do not have true leaves (megaphyll.