Tag: pictorial feature of plant kingdom

Antheridia (male sex organs) and archegonia (female sex organs) are multicellular, jacketed reproductive structures characteristic of bryophytes (such as mosses), pteridophytes, and gymnosperms. Spirogyra (a green alga), Mucor (a fungus), and Puccinia (a fungus) do not possess these complex, jacketed sex organs.

In Riccia, the sporophyte is extremely simple, consisting only of a capsule that remains permanently embedded within the tissue of the gametophytic thallus. Because it lacks any specialized dehiscence mechanism like elaters or peristome teeth, the spores are only released when the surrounding thallus and outer capsule wall decay and decompose.

In mosses like Funaria, stomata are present exclusively on the apophysis, which is the sterile basal region of the capsule. These stomata are considered primitive because they often consist of a single ring-like guard cell with a central pore, rather than two distinct kidney-shaped guard cells.

In Riccia, the sporophyte is the simplest among bryophytes, lacking a foot and seta. During its development, some of the sporogenous cells do not form spores but instead differentiate into sterile nurse cells (nutritive cells) that provide nourishment to the developing spores, while elaters are completely absent.

In the liverwort Riccia, the sex organs (antheridia and archegonia) develop on the dorsal surface of the thallus and become deeply embedded within cavities of the photosynthetic tissue as the thallus grows. In mosses and ferns, the sex organs are typically superficial or borne on specialized structures rather than being embedded deep within the vegetative thallus.

Chlorenchyma is a specialized parenchymatous tissue containing chloroplasts, responsible for photosynthesis. In the sporophyte of a moss, particularly in the outer layers of the capsule wall and the apophysis region, chlorenchyma is well-developed, allowing the sporophyte to manufacture some of its own food. Chlorella is a unicellular alga, Aspergillus is a non-photosynthetic fungus, and pollen tubes lack chlorenchyma.

Mosses are non-vascular plants, meaning they lack true vascular tissues like xylem and phloem. Instead, conduction of water and nutrients is carried out by specialized elongated parenchymatous cells called hydroids (for water) and leptoids (for food), which are structurally simple parenchyma.

The Western Himalayas is often referred to as the "gold mine of liverworts" in Indian bryology due to the pioneering studies by Shiv Ram Kashyap and the region's rich diversity of liverwort species thriving in its varied altitudinal zones and microclimates.

The sporophyte of Riccia is the simplest among bryophytes, consisting only of a capsule embedded within the gametophytic thallus. It lacks chlorophyll, a foot, and a seta, making it completely dependent on the gametophytic thallus for water, nutrients, and physical support, thus acting as a total parasite.

Sphagnum is commonly known as peat moss or bog moss because it grows in acidic bogs and accumulates over time to form peat. Peat is highly valued for its water-retaining capacity and is used as a soil conditioner, fuel, and packing material for transporting live plants.