News tagged with spores
Cold plasma successful against brain cancer cells
For the first time, physicists from the Max Planck Institute for Extraterrestrial Physics (MPE), biologists and physicians demonstrated the synergistic effect of cold atmospheric plasma - a partly ionized ...
Cancer
May 23, 2013 |
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Valley fever hits 28 at Calif. solar plant sites
(AP)—Authorities are investigating a valley fever outbreak that sickened 28 workers at solar power plants under construction in Central California.
Diseases, Conditions, Syndromes
May 01, 2013 |
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Dedicated cleaning staff shown to reduce C. difficile contamination in hospital rooms
With rates and deaths associated with Clostridium difficile (C. difficile) at historically high levels, many hospitals have taken extra steps to reduce these infections. New research finds that a dedicated daily cleaning crew ...
Diseases, Conditions, Syndromes
Apr 09, 2013 |
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C. diff infection risk rises with antihistamine use to treat stomach acid, study finds
Patients receiving antihistamines to suppress stomach acid are at greater risk of infection from Clostridium difficile, or C. diff, a common cause of diarrhea, particularly in health care settings, Mayo Clinic researchers h ...
Diseases, Conditions, Syndromes
Mar 27, 2013 |
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FDA approves new drug for inhaled anthrax
Federal health officials say they approved a new injectable drug from Human Genome Sciences to treat inhalable anthrax.
Medications
Dec 14, 2012 |
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Probiotics show potential to minimize C. difficile
(Medical Xpress)—New cases of C. difficile-associated diarrhea among hospitalized patients taking antibiotics can be reduced by two-thirds with the use of probiotics, according to new research published Monday in the Annals of ...
Diseases, Conditions, Syndromes
Nov 13, 2012 |
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Neutrons help explain why antibiotics prescribed for chemotherapy cause kidney failure
Neutron scattering experiments have provided new insights into the origin of the side effects of an antifungal drug prescribed all over the world. The analysis conducted by scientists at King's College London ...
Medical research
Oct 29, 2012 |
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The Medical Minute: Fall and winter bring allergy woes, too
It's the time of year seasonal allergy sufferers anticipate relief with the first frost, ridding them of the ragweed currently plaguing their nostrils. Allergy season is almost over.
Immunology
Oct 11, 2012 |
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That may not be a cold, could be fall allergies
(HealthDay)—Many parents complain that as soon as school starts, their child inevitably catches a cold. But, while kids do swap their fair share of germs during the school day, not every runny nose stems ...
Diseases, Conditions, Syndromes
Sep 25, 2012 |
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Indoor marijuana grow operations pose healthy threat
(Medical Xpress)—Houses and other buildings used to grow marijuana indoors contain high levels of mold, which could pose a health threat to residents living there and law enforcement agents investigating them, according ...
Health
Sep 17, 2012 |
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Dangerous air quality alert issued for toxic mold
The Midwest is under an air quality alert for dangerous levels of mold. The Midwest mold count today is 60,000 – well over the 50,000 threshold that signals a dangerous air quality warning.
Health
Sep 07, 2012 |
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Hurricane Isaac could stir up allergies, asthma
(HealthDay)—Dangerous winds and flooding aren't the only hazards posed by Hurricane Isaac as it pounds Louisiana and Mississippi.
Diseases, Conditions, Syndromes
Aug 29, 2012 |
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Natural killer cells could be key to anthrax defense
One of the things that makes inhalational anthrax so worrisome for biodefense experts is how quickly a relatively small number of inhaled anthrax spores can turn into a lethal infection. By the time an anthrax victim realizes ...
Medical research
Oct 27, 2011 |
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Decade after anthrax attacks, worry over stockpile
(AP) -- Anthrax vaccine - check. Antibiotics - check. A botulism treatment - check. Smallpox vaccine - check.
Other
Sep 26, 2011 |
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Spore
In biology, a spore is a reproductive structure that is adapted for dispersal and surviving for extended periods of time in unfavorable conditions. Spores form part of the life cycles of many bacteria, plants, algae, fungi and some protozoans. A chief difference between spores and seeds as dispersal units is that spores have very little stored food resources compared with seeds.
Spores are usually haploid and unicellular and are produced by meiosis in the sporangium by the sporophyte. Once conditions are favorable, the spore can develop into a new organism using mitotic division, producing a multicellular gametophyte, which eventually goes on to produce gametes.
Two gametes fuse to create a new sporophyte. This cycle is known as alternation of generations, but a better term is "biological life cycle", as there may be more than one phase and so it cannot be a direct alternation. Haploid spores produced by mitosis (known as mitospores) are used by many fungi for asexual reproduction.
Many ferns, especially those adapted to dry conditions, produce diploid spores. This form of asexual reproduction is called apogamy. It is a form of apomixis.
Spores are the units of asexual reproduction, because a single spore develops into a new organism. By contrast, gametes are the units of sexual reproduction, as two gametes need to fuse to create a new organism.
For more information about Spore, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
