The Fern Sporangium: A Unique Catapult | Science - AAAS
2012年3月16日 · Abstract. Various plants and fungi have evolved ingenious devices to disperse their spores. One such mechanism is the cavitation-triggered catapult of fern sporangia. The spherical sporangia enclosing the spores are equipped with a …
Sporangium - Wikipedia
In ferns, sporangia are typically found on the abaxial surface (underside) of the leaf and are densely aggregated into clusters called sori. Sori may be covered by a structure called an indusium. Some ferns have their sporangia scattered along reduced leaf segments or along (or just in from) the margin of the leaf.
21.4: Ferns (Class Polypodiopsida) - Biology LibreTexts
Each sporangium is lined by an inflated strip of cells called an annulus. When the spores have matured, the cells in the annulus begin to dry out, causing the cells to collapse and pull the sporangium open, releasing the spores.
Sporangia and Spores in the Fern Genera - Springer
2020年4月20日 · We provide full morphological descriptions of the spores and sporangia of all these taxa. We point out that the perispore structure and ornamentation and the number and the thickness of stomium cells in the sporangium clearly distinguish both genera.
Sporangium – Definition, Characteristics, Structure, Importance
2024年3月29日 · Ferns, particularly those belonging to the leprosporangiate group, have adopted an ingenious mechanism reminiscent of a catapult system to ensure the effective dispersal of their spores. Central to this mechanism is the sporangium, a specialized structure in ferns responsible for spore formation.
The fern cavitation catapult: mechanism and design principles
Ferns reproduce by means of spores that develop within a spherical sporangium (figure 1). The small size of the spores (less than 50 µm) allows them to be carried by air currents over great distances.
The Fern Sporangium: A Unique Catapult. X. Noblin,1* N. O. Rojas,2J. Westbrook,3C. Llorens,2 M. Argentina,2J. Dumais4. Spore dispersal in plants and fungi plays a critical role in the survival of species and is thus under strong selective pressure.
One such dispersal mechanism is the cavitation-triggered 17 catapult of fern sporangia. The sporangia open when dehydrating and use the stored 18 elastic energy to power a fast closure motion that ultimately ejects the spores.
The fern sporangium: an ultrafast natural catapult - ResearchGate
2012年2月1日 · We show here that the fern sporangium replaces the essential cross bar by an elegant poroelastic damping, leading to a completely autonomous, efficient device.
The Fern Sporangium: A Unique Catapult - Semantic Scholar
2012年3月16日 · High-speed observations reveal how rapid changes in cell shape powerfully eject fern spores. Various plants and fungi have evolved ingenious devices to disperse their spores. One such mechanism is the cavitation-triggered catapult of fern sporangia.