Search results for pollen tubes:
Mate choice in plants
Biology /
Jun 28, 2008 |
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In flowering plants, the female reproductive organ, the pistil, comprises the stigma, style, and ovary. The stigma catches pollen shed by the male anthers. If the pollen is compatible, it will germinate and send tubes through ...
Sex life of plants reveals conflicts between the sexes
May 08, 2009 |
4 / 5 (2) |
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The pollen grains of male plants live in great competition. A grain of pollen that succeeds in manipulating the flower’s pistil can emerge victorious from the struggle. This is shown by new research from Lund University in ...
Scientists find unexpected key to flowering plants' diversity
Biology /
Jul 28, 2008 |
4.6 / 5 (19) |
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What began with an off-the-cuff curiosity eventually led Joe Williams to hang from the limbs of a tree 80 feet above the soil of northeastern Australia.
Scientists discover environmental factors linked to sex ratio of plants
Biology /
Jul 22, 2008 |
5 / 5 (2) |
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Environmental factors can transform the ratio of females to males in plant populations according to new research out of the University of Toronto.
Hold that tissue: Allergy help may be on the way
Feb 13, 2009 |
4 / 5 (1) |
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It isn’t beach weather in most of the United States right now, but it’s never too early to be thinking about spring and summer. Unfortunately, for people with allergies, today’s daydreams can turn into nightmares ...
Nothing to sneeze at: Real-time pollen forecasts
Chemistry / Analytical Chemistry
Dec 22, 2008 |
4 / 5 (2) |
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Researchers in Germany are reporting an advance toward development of technology that could make life easier for millions of people allergic to plant pollen. It could underpin the first automated, real-time ...
Biologists find unusual plant gene: abstinence by mutual consent
Biology /
Dec 20, 2007 |
3.3 / 5 (7) |
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Biologists at the University of California, San Diego have discovered a gene in plants that disrupts fertilization only when mutations in the gene are present in both the female and male reproductive cells.
Female plant 'communicates' rejection or acceptance of male
Biology /
Oct 23, 2008 |
5 / 5 (5) |
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(PhysOrg.com) -- Without eyes or ears, plants must rely on the interaction of molecules to determine appropriate mating partners and avoid inbreeding. In a new study, University of Missouri researchers have identified pollen ...
Biologists Unlock Secrets of Plants' Growing Tips
Aug 25, 2009 |
5 / 5 (6) |
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(PhysOrg.com) -- Biologist Magdalena Bezanilla and colleagues at the University of Massachusetts Amherst have used a technique they call multi-gene silencing to, for the first time, simultaneously silence nine genes in a ...
Flight of the bumble (and honey) bee
Mar 20, 2009 |
5 / 5 (2) |
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Insects such as honeybees and bumble bees are predictable in the way they move among flowers, typically moving directly from one flower to an adjacent cluster of flowers in the same row of plants. The bees' ...
Hay fever study interrogates prime suspect: pollen
Nov 02, 2007 |
4 / 5 (4) |
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A new online tool indicating pollen risk will allow people who suffer from hay fever and asthma to be more informed about air-borne organic irritants this spring. It’s part of a larger project designed to help those for whom ...
Killer bees may increase food supplies for native bees
Oct 01, 2009 |
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Aggressive African bees were accidentally released in Brazil in 1957. As "killer bees" spread northward, David Roubik, staff scientist at the Smithsonian Tropical Research Institute, began a 17-year study ...
Silencing of jumping genes in pollen
Biology /
Feb 05, 2009 |
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Scientists at the Instituto Gulbenkian de Ciência (IGC), in Portugal, are to date the only research group in the world capable of isolating the sperm cells in the pollen grain of the model plant Arabidopsis thaliana. This ...
Hay fever season peaking
Sep 03, 2007 |
4.7 / 5 (3) |
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Last month's downpour in the Midwest has triggered an increase in mold spores but dampened the U.S. pollen count -- at least temporarily.
Pollen Alert!
Sep 19, 2008 |
4 / 5 (1) |
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When you stroll through your front door in the morning, does the yellow haze coating the porch send you leaping back into the house? Can the mere word "pollen" make you start to sniffle, sneeze and reach for ...
