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A sporangium (from Late Latin, from Ancient Greek σπορά (sporá) 'seed' and ἀγγεῖον (angeîon) 'vessel'); pl.: sporangia) [1] is an enclosure in which spores are formed. [2] It can be composed of a single cell or can be multicellular .
These specialized hyphae usually show negative gravitropism and positive phototropism allowing good spore dispersal. The sporangia wall is thin and is easily destroyed by mechanical stimuli (e.g. falling raindrops, passing animals), leading to the dispersal of the ripe mitospores. The walls of these spores contain sporopollenin in some species ...
The fungus produces a thick walled structure known as a winter sporangium. It is 25-75 μm in diameter and contains 200-300 spores. Sporangia are clustered into thin-walled sori. The motile life stage, zoospore is about 0,5 μm in diameter and has one posterior flagellum.
A walled spore produced within a sporangium. [358] sporangium. pl. sporangia. A sac-like structure that produces spores endogenously. From Gr. angeion, vessel. [359] spore A reproductive structure in fungi. Can result from both sexual and asexual processes. [360] spore wall The layered wall defining a spore. Considered to have five layers.
Thick-walled resting spores of fungi produced to survive in unfavorable conditions Asomycota: Pseudohyphae, chlamydospores and blastospores of Candida yeast. Parasitic Fungal Spore Internal Spores Germinate within a host A parasitic pink fungi on a Lichen tree: External (Environmental) spores Spores released by the host to infest other hosts [7]
The sporangiospores are asexual mitospores (formed via mitosis), produced inside sporangia (thousands of spores) or sporangioles (single or few spores).They are released when mature by the disintegration of the sporangium wall, or as a whole sporangiole that separates from the sporangiophore.
The germinated zygote produces a diploid thallus with two types of sporangia: thin-walled zoosporangia and thick walled resting spores (or sporangia). The thin walled sporangia release diploid zoospores. The resting spore serves as a means of enduring unfavorable conditions. When conditions are favorable again, meiosis occurs and haploid ...
Eusporangiate ferns are vascular spore plants, whose sporangia arise from several epidermal cells and not from a single cell as in leptosporangiate ferns.Typically these ferns have reduced root systems and sporangia that produce large amounts of spores (up to 7000 spores per sporangium in Christensenia).