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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]
The term spore derives from the ancient Greek word σπορά spora, meaning "seed, sowing", related to σπόρος sporos, "sowing", and σπείρειν speirein, "to sow". In common parlance, the difference between a "spore" and a " gamete " is that a spore will germinate and develop into a sporeling , while a gamete needs to combine with ...
Starting from a plant which disperses by spores, highly complex changes are needed to produce seeds. The sporophyte has two kinds of spore-forming organs or sporangia. One kind, the megasporangium, produces only a single large spore, a megaspore. This sporangium is surrounded by sheathing layers or integuments which form the seed coat.
Runcaria, small and radially symmetrical, is an integumented megasporangium surrounded by a cupule. The megasporangium bears an unopened distal extension protruding above the mutlilobed integument. It is suspected that the extension was involved in anemophilous (wind) pollination.
X-ray and electron-beam/E-beam irradiation of food has been trialed as a quarantine treatment for fruit commodities originating from Hawaii. The US FDA ( Food and Drug Administration ), USDA APHIS ( Animal and Plant Health Inspection Service ), producers, and consumers were all accepting of the results - more thorough pest eradication and ...
Treatment with β-glucosidase causes cycasin to release methylazoxymethanol (MAM), which spontaneously decomposes to form formaldehyde and methyldiazonium. The amount of formaldehyde released is too small to induce toxicity, but methyldiazonium is a potent methylating agent. The presence of this molecule methylates DNA, causing long-term damage ...
After Cycas revoluta, this is probably the most popular cycad species in cultivation. In temperate regions, it is commonly grown as a houseplant and, in subtropical areas, as a container or bedding plant outdoors.
Myiasis (/ m aɪ. ˈ aɪ. ə. s ə s / my-EYE-ə-səss [1]), also known as flystrike or fly strike, is the parasitic infestation of the body of a live animal by fly larvae that grow inside the host while feeding on its tissue.