Search results
Results From The WOW.Com Content Network
The female counterpart to the antheridium in cryptogams is the archegonium, and in flowering plants is the gynoecium. An antheridium typically consists of sterile cells and spermatogenous tissue. The sterile cells may form a central support structure or surround the spermatogenous tissue as a protective jacket.
An archegonium (pl.: archegonia), from the Ancient Greek ἀρχή ("beginning") and γόνος ("offspring"), is a multicellular structure or organ of the gametophyte phase of certain plants, producing and containing the ovum or female gamete. The corresponding male organ is called the antheridium. The archegonium has a long neck canal or ...
The main axis of the plant, which is upright, bears a set of spirally arranged, sessile leaves having a clearly distinguishable midrib. Sporophyte of Funaria. At the apex of the main plant axis, the antheridium is borne. This is the male part of the shoot. A lateral branch from the main plant axis bears the female shoot archegonium at its meristem.
All plants within the Anthurium genus are toxic to cats, dogs, and even horses. Each part of the plant, including the root, stems, leaves, flowers, and seeds, poses a risk of toxicity. The plant contains insoluble calcium oxalate crystals, which can cause oral irritation, pain, swelling, excessive drooling, vomiting, and difficulty swallowing.
The plant itself is about 85 x 5mm. [4] It is dioicous. Dioicous is defined as a plant having the male and female reproductive organs in separate individuals. An archegonium is a multicellular reproductive organ that produces female gametes. The antheridium is the male structure that holds, creates and releases sperm.
However, not all heteromorphic gametophytes come from heterosporous plants. That is, some plants have distinct egg-producing and sperm-producing gametophytes, but these gametophytes develop from the same kind of spore inside the same sporangium; Sphaerocarpos is an example of such a plant. In seed plants, the microgametophyte is called pollen.
Each antheridium develops on a long, slender stalk made up of two rows of cells. [8] Individual colonies are often multiclonal, with male and female plants growing intermixed, indicating establishment from multiple spores. While female plants are relatively common (about 49% of shoots), male plants are less frequently found (around 10% of ...
Most plants are monoecious, with both sex organs on the same plant, but some plants (even within the same species) are dioecious, with separate male and female gametophytes. The female organs are known as archegonia (singular archegonium) and the male organs are known as antheridia (singular antheridium). Both kinds of organs develop just below ...