The evolution and development of sporangia—The fundamental …
2024年10月1日 · Bryophyte archesporial initials (archesporium) will proliferate and differentiate into sporocytes that then undergo meiosis to produce spores. Recent functional studies of subclass II bHLH transcription factors in Physcomitrium patens and Marchantia polymorpha have shown that the tapetum is an ancestral plant trait even if it is not readily ...
Bryophyte | Definition, Characteristics, Structure, Examples,
2024年11月15日 · In contrast to vascular plants, the bryophyte sporophyte usually lacks a complex vascular system and produces only one spore-containing organ (sporangium) rather than many.
Bryophytes structure and reproduction - PEOI
A sporangium (capsule) :- a sporangium with a columella, spores, an operculum, peristome teeth, and a calyptra. Mosses are monosporangiate, meaning that each sporophyte produces only a single sporangium, or capsule.
Biology 2e, Biological Diversity, Seedless Plants, Bryophytes
The sporangium —the multicellular sexual reproductive structure in which meiosis produces haploid spores—is present in bryophytes and absent in the majority of algae. This is also a characteristic of land plants.
Bryophytes – Biology 2e - Thompson Rivers University
Spore mother cells in the sporangium undergo meiosis to produce haploid spores. The sporophyte has several features that protect the developing spores and aid in their dispersal. The calyptra, derived from the walls of the archegonium, covers the sporangium. A structure called the operculum is at the tip of the spore capsule.
Bryophytes | Biology for Majors II - Lumen Learning
The sporangium—the multicellular sexual reproductive structure—is present in bryophytes and absent in the majority of algae. The bryophyte embryo also remains attached to the parent plant, which protects and nourishes it.
Sporangium | biology | Britannica
Mature bryophytes have a single sporangium (spore-producing structure) on each sporophyte. The sporangium generally terminates an elongate stalk, or seta, when the sporangium is ready to shed its spores. The sporangium rupture usually involves specialized structures that enhance expulsion of the spores away from the parent gametophyte.
Evolution and development of fundamental reproductive …
The one commonality amongst all of these reproductive structures is the sporangium where the genetic material is halved. The transition to sporangium initiation and its subsequent development are essential for the production of plant genetic diversity, the completion of the plant life cycle, and the production of seeds.
Biology, Biological Diversity, Seedless Plants, Bryophytes
The sporangium—the multicellular sexual reproductive structure—is present in bryophytes and absent in the majority of algae. The bryophyte embryo also remains attached to the parent plant, which protects and nourishes it. This is a characteristic of land plants.
Step 1: Read the introductory remarks and list of characteristics of the Bryophytes (p.3) and Pteridophytes (p.8). Be mindful of which lineage lacks vasculature, which has a poorly developed cuticle, and which lineage(s) require the presence of …