News tagged with pollen
Trapped dental 'calculus' holds clues to ancient human diets and health
Many ancient human teeth, including specimens tens of thousands of years old, still hold onto tiny pieces of food -- and even bacteria. Anthropologists are studying the tartar attached to ancient human teeth ...
Other Sciences / Archaeology & Fossils
May 31, 2012 |
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Got nectar? To hawkmoths, humidity is a cue
(Phys.org) -- Humidity emanating from a flower's nectar stores tells a moth if the flower is worth a visit, research led by a UA entomologist has discovered.
May 30, 2012 |
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Scientists discover first ever record of insect pollination from 100 million years ago
Amber from Cretaceous deposits (110-105 my) in Northern Spain has revealed the first ever record of insect pollination. Scientists have discovered in two pieces of amber several specimens of tiny insects covered ...
May 14, 2012 |
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Pollen levels are rising across Europe
When trees and plants release their pollen, millions of hay fever sufferers are affected by sneezing fits and itchy, watery eyes. Today in Germany, roughly every fourth person suffers from allergies – and this figure ...
Apr 16, 2012 |
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Pollen can protect mahogany from extinction
New research from the University of Adelaide could help protect one of the world's most globally threatened tree species - the big leaf mahogany - from extinction.
Apr 03, 2012 |
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Fossilized pollen unlocks secrets of 2,500-year-old royal garden
Researchers have long been fascinated by the secrets of Ramat Rahel, located on a hilltop above modern-day Jerusalem. The site of the only known palace dating back to the kingdom of Biblical Judah, digs have ...
Other Sciences / Archaeology & Fossils
Feb 16, 2012 |
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Flower power: How to get ahead in advertising
Some plants go to extraordinary lengths to attract pollinators. A unique collaboration between plant scientists and physicists is revealing the full extent of botanical advertising.
Feb 03, 2012 |
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Pollen research not be sniffed at
Pollen may annoy allergy sufferers in springtime but, viewed under the microscope, a pollen grain is a thing of beauty. Amazing images and facts about pollen are part of an exhibition at CSIRO Discovery in Canberra beginning ...
Nov 29, 2011 |
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Study of flower petals shows evolution at the cellular level
A new study of flower petals shows evolution in action, and contradicts more that 60 years of scientific thought.
Nov 17, 2011 |
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Researcher identifies 11 new sweat bee species
(PhysOrg.com) -- When a scientist discovers a new species, one of hardest tasks is naming it. A Cornell researcher faced this challenge many times over when he discovered 11 new U.S. sweat bee species (subgenus ...
Nov 15, 2011 |
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How does a plant survive with few mates or pollinators? A European herb has figured out its own way
In plants that rely on animals for pollination, the number of seeds they produce, or their relative fitness, is influenced by pollinator visits and the successful deposition of pollen. The number of visits ...
Nov 10, 2011 |
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Why are orchids so successful?
In terms of diversity, orchids are one of the most successful groups of flowering plants, with over 22,000 species. Both pollinating animals and mycorrhizal fungi are believed to have been important in the ...
Sep 13, 2011 |
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EU court backs angry honeymaker in GM pollen row
The presence of pollen from GM maize in honey, even in minuscule quantities, renders farm produce commercially void in the European Union, the bloc's top court said Tuesday.
Sep 06, 2011 |
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As agricultural riches waylay pollinators, an endangered tree suffers
For the conservation of species, hostile territory might sometimes have its advantages. That's according to a study of pollen flow among trees found only in remnant patches of native Chilean forest. The data show that the ...
Jul 21, 2011 |
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Team shows how the honey bee tolerates some synthetic pesticides
A new study reveals how enzymes in the honey bee gut detoxify pesticides commonly used to kill mites in the honey bee hive. This is the first study to tease out the precise molecular mechanisms that allow ...
Jul 20, 2011 |
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Pollen
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes (sperm cells). Pollen grains have a hard coat that protects the sperm cells during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the female cone of coniferous plants. When pollen lands on a compatible pistil or female cone (i.e., when pollination has occurred), it germinates and produces a pollen tube that transfers the sperm to the ovule (or female gametophyte). Individual pollen grains are small enough to require magnification to see detail.
For more information about Pollen, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
